Jean Delvare [Mon, 24 Feb 2014 08:39:27 +0000 (09:39 +0100)]
i7core_edac: Fix PCI device reference count
commit
c0f5eeed0f4cef4f05b74883a7160e7edde58b6a upstream.
The reference count changes done by pci_get_device can be a little
misleading when the usage diverges from the most common scheme. The
reference count of the device passed as the last parameter is always
decreased, even if the function returns no new device. So if we are
going to try alternative device IDs, we must manually increment the
device reference count before each retry. If we don't, we end up
decreasing the reference count, and after a few modprobe/rmmod cycles
the PCI devices will vanish.
In other words and as Alan put it: without this fix the EDAC code
corrupts the PCI device list.
This fixes kernel bug #50491:
https://bugzilla.kernel.org/show_bug.cgi?id=50491
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Link: http://lkml.kernel.org/r/20140224093927.7659dd9d@endymion.delvare
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jan Kara [Thu, 20 Feb 2014 16:02:27 +0000 (17:02 +0100)]
quota: Fix race between dqput() and dquot_scan_active()
commit
1362f4ea20fa63688ba6026e586d9746ff13a846 upstream.
Currently last dqput() can race with dquot_scan_active() causing it to
call callback for an already deactivated dquot. The race is as follows:
CPU1 CPU2
dqput()
spin_lock(&dq_list_lock);
if (atomic_read(&dquot->dq_count) > 1) {
- not taken
if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {
spin_unlock(&dq_list_lock);
->release_dquot(dquot);
if (atomic_read(&dquot->dq_count) > 1)
- not taken
dquot_scan_active()
spin_lock(&dq_list_lock);
if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags))
- not taken
atomic_inc(&dquot->dq_count);
spin_unlock(&dq_list_lock);
- proceeds to release dquot
ret = fn(dquot, priv);
- called for inactive dquot
Fix the problem by making sure possible ->release_dquot() is finished by
the time we call the callback and new calls to it will notice reference
dquot_scan_active() has taken and bail out.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Sujith Manoharan [Fri, 14 Feb 2014 02:45:20 +0000 (08:15 +0530)]
ath9k: Fix ETSI compliance for AR9462 2.0
commit
b3050248c167871ca52cfdb2ce78aa2460249346 upstream.
The minimum CCA power threshold values have to be adjusted
for existing cards to be in compliance with new regulations.
Newer cards will make use of the values obtained from EEPROM,
support for this was added earlier. To make sure that cards
that are already in use and don't have proper values in EEPROM,
do not violate regulations, use the initvals instead.
Reported-by: Jeang Daniel <dyjeong@qca.qualcomm.com>
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Stanislaw Gruszka [Wed, 19 Feb 2014 12:15:17 +0000 (13:15 +0100)]
ath9k: protect tid->sched check
commit
21f8aaee0c62708654988ce092838aa7df4d25d8 upstream.
We check tid->sched without a lock taken on ath_tx_aggr_sleep(). That
is race condition which can result of doing list_del(&tid->list) twice
(second time with poisoned list node) and cause crash like shown below:
[424271.637220] BUG: unable to handle kernel paging request at
00100104
[424271.637328] IP: [<
f90fc072>] ath_tx_aggr_sleep+0x62/0xe0 [ath9k]
...
[424271.639953] Call Trace:
[424271.639998] [<
f90f6900>] ? ath9k_get_survey+0x110/0x110 [ath9k]
[424271.640083] [<
f90f6942>] ath9k_sta_notify+0x42/0x50 [ath9k]
[424271.640177] [<
f809cfef>] sta_ps_start+0x8f/0x1c0 [mac80211]
[424271.640258] [<
c10f730e>] ? free_compound_page+0x2e/0x40
[424271.640346] [<
f809e915>] ieee80211_rx_handlers+0x9d5/0x2340 [mac80211]
[424271.640437] [<
c112f048>] ? kmem_cache_free+0x1d8/0x1f0
[424271.640510] [<
c1345a84>] ? kfree_skbmem+0x34/0x90
[424271.640578] [<
c10fc23c>] ? put_page+0x2c/0x40
[424271.640640] [<
c1345a84>] ? kfree_skbmem+0x34/0x90
[424271.640706] [<
c1345a84>] ? kfree_skbmem+0x34/0x90
[424271.640787] [<
f809dde3>] ? ieee80211_rx_handlers_result+0x73/0x1d0 [mac80211]
[424271.640897] [<
f80a07a0>] ieee80211_prepare_and_rx_handle+0x520/0xad0 [mac80211]
[424271.641009] [<
f809e22d>] ? ieee80211_rx_handlers+0x2ed/0x2340 [mac80211]
[424271.641104] [<
c13846ce>] ? ip_output+0x7e/0xd0
[424271.641182] [<
f80a1057>] ieee80211_rx+0x307/0x7c0 [mac80211]
[424271.641266] [<
f90fa6ee>] ath_rx_tasklet+0x88e/0xf70 [ath9k]
[424271.641358] [<
f80a0f2c>] ? ieee80211_rx+0x1dc/0x7c0 [mac80211]
[424271.641445] [<
f90f82db>] ath9k_tasklet+0xcb/0x130 [ath9k]
Bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=70551
Reported-and-tested-by: Max Sydorenko <maxim.stargazer@gmail.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2:
- Adjust context
- Use spin_unlock_bh() directly]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Eric Paris [Thu, 20 Feb 2014 15:56:45 +0000 (10:56 -0500)]
SELinux: bigendian problems with filename trans rules
commit
9085a6422900092886da8c404e1c5340c4ff1cbf upstream.
When writing policy via /sys/fs/selinux/policy I wrote the type and class
of filename trans rules in CPU endian instead of little endian. On
x86_64 this works just fine, but it means that on big endian arch's like
ppc64 and s390 userspace reads the policy and converts it from
le32_to_cpu. So the values are all screwed up. Write the values in le
format like it should have been to start.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Emmanuel Grumbach [Thu, 20 Feb 2014 07:22:11 +0000 (09:22 +0200)]
mac80211: fix AP powersave TX vs. wakeup race
commit
1d147bfa64293b2723c4fec50922168658e613ba upstream.
There is a race between the TX path and the STA wakeup: while
a station is sleeping, mac80211 buffers frames until it wakes
up, then the frames are transmitted. However, the RX and TX
path are concurrent, so the packet indicating wakeup can be
processed while a packet is being transmitted.
This can lead to a situation where the buffered frames list
is emptied on the one side, while a frame is being added on
the other side, as the station is still seen as sleeping in
the TX path.
As a result, the newly added frame will not be send anytime
soon. It might be sent much later (and out of order) when the
station goes to sleep and wakes up the next time.
Additionally, it can lead to the crash below.
Fix all this by synchronising both paths with a new lock.
Both path are not fastpath since they handle PS situations.
In a later patch we'll remove the extra skb queue locks to
reduce locking overhead.
BUG: unable to handle kernel
NULL pointer dereference at
000000b0
IP: [<
ff6f1791>] ieee80211_report_used_skb+0x11/0x3e0 [mac80211]
*pde =
00000000
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
EIP: 0060:[<
ff6f1791>] EFLAGS:
00210282 CPU: 1
EIP is at ieee80211_report_used_skb+0x11/0x3e0 [mac80211]
EAX:
e5900da0 EBX:
00000000 ECX:
00000001 EDX:
00000000
ESI:
e41d00c0 EDI:
e5900da0 EBP:
ebe458e4 ESP:
ebe458b0
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0:
8005003b CR2:
000000b0 CR3:
25a78000 CR4:
000407d0
DR0:
00000000 DR1:
00000000 DR2:
00000000 DR3:
00000000
DR6:
ffff0ff0 DR7:
00000400
Process iperf (pid: 3934, ti=
ebe44000 task=
e757c0b0 task.ti=
ebe44000)
iwlwifi 0000:02:00.0: I iwl_pcie_enqueue_hcmd Sending command LQ_CMD (#4e), seq: 0x0903, 92 bytes at 3[3]:9
Stack:
e403b32c ebe458c4 00200002 00200286 e403b338 ebe458cc c10960bb e5900da0
ff76a6ec ebe458d8 00000000 e41d00c0 e5900da0 ebe458f0 ff6f1b75 e403b210
ebe4598c ff723dc1 00000000 ff76a6ec e597c978 e403b758 00000002 00000002
Call Trace:
[<
ff6f1b75>] ieee80211_free_txskb+0x15/0x20 [mac80211]
[<
ff723dc1>] invoke_tx_handlers+0x1661/0x1780 [mac80211]
[<
ff7248a5>] ieee80211_tx+0x75/0x100 [mac80211]
[<
ff7249bf>] ieee80211_xmit+0x8f/0xc0 [mac80211]
[<
ff72550e>] ieee80211_subif_start_xmit+0x4fe/0xe20 [mac80211]
[<
c149ef70>] dev_hard_start_xmit+0x450/0x950
[<
c14b9aa9>] sch_direct_xmit+0xa9/0x250
[<
c14b9c9b>] __qdisc_run+0x4b/0x150
[<
c149f732>] dev_queue_xmit+0x2c2/0xca0
Reported-by: Yaara Rozenblum <yaara.rozenblum@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
[reword commit log, use a separate lock]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Takashi Iwai [Tue, 18 Feb 2014 08:37:30 +0000 (09:37 +0100)]
ASoC: wm8770: Fix wrong number of enum items
commit
7a6c0a58dc824523966f212c76322d47c5b0e6fe upstream.
wm8770 codec driver defines ain_enum with a wrong number of items.
Use SOC_ENUM_DOUBLE_DECL() macro and it's automatically fixed.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Hans de Goede [Thu, 13 Feb 2014 15:32:51 +0000 (16:32 +0100)]
ACPI / video: Filter the _BCL table for duplicate brightness values
commit
bd8ba20597f0cfef3ef65c3fd2aa92ab23d4c8e1 upstream.
Some devices have duplicate entries in there brightness levels table, ie
on my Dell Latitude E6430 the table looks like this:
[ 3.686060] acpi backlight index 0, val 80
[ 3.686095] acpi backlight index 1, val 50
[ 3.686122] acpi backlight index 2, val 5
[ 3.686147] acpi backlight index 3, val 5
[ 3.686172] acpi backlight index 4, val 5
[ 3.686197] acpi backlight index 5, val 5
[ 3.686223] acpi backlight index 6, val 5
[ 3.686248] acpi backlight index 7, val 5
[ 3.686273] acpi backlight index 8, val 6
[ 3.686332] acpi backlight index 9, val 7
[ 3.686356] acpi backlight index 10, val 8
[ 3.686380] acpi backlight index 11, val 9
etc.
Notice that brightness values 0-5 are all mapped to 5. This means that
if userspace writes any value between 0 and 5 to the brightness sysfs attribute
and then reads it, it will always return 0, which is somewhat unexpected.
This is a problem for ie gnome-settings-daemon, which uses read-modify-write
logic when the users presses the brightness up or down keys. This is done
this way to take brightness changes from other sources into account.
On this specific laptop what happens once the brightness has been set to 0,
is that gsd reads 0, adds 5, writes 5, and on the next brightness up key press
again reads 0, so things get stuck at the lowest brightness setting.
Filtering out the duplicate table entries, makes any write to brightness
read back as the written value as one would expect, fixing this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Takashi Iwai [Tue, 18 Feb 2014 08:24:12 +0000 (09:24 +0100)]
ASoC: sta32x: Fix array access overflow
commit
025c3fa9256d4c54506b7a29dc3befac54f5c68d upstream.
Preset EQ enum of sta32x codec driver declares too many number of
items and it may lead to the access over the actual array size.
Use SOC_ENUM_SINGLE_DECL() helper and it's automatically fixed.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Guenter Roeck [Sun, 16 Feb 2014 01:54:06 +0000 (17:54 -0800)]
hwmon: (max1668) Fix writing the minimum temperature
commit
500a91571f0a5d0d3242d83802ea2fd1faccc66e upstream.
When trying to set the minimum temperature, the driver was erroneously
writing the maximum temperature into the chip.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tejun Heo [Thu, 13 Feb 2014 18:29:31 +0000 (13:29 -0500)]
cgroup: update cgroup_enable_task_cg_lists() to grab siglock
commit
532de3fc72adc2a6525c4d53c07bf81e1732083d upstream.
Currently, there's nothing preventing cgroup_enable_task_cg_lists()
from missing set PF_EXITING and race against cgroup_exit(). Depending
on the timing, cgroup_exit() may finish with the task still linked on
css_set leading to list corruption. Fix it by grabbing siglock in
cgroup_enable_task_cg_lists() so that PF_EXITING is guaranteed to be
visible.
This whole on-demand cg_list optimization is extremely fragile and has
ample possibility to lead to bugs which can cause things like
once-a-year oops during boot. I'm wondering whether the better
approach would be just adding "cgroup_disable=all" handling which
disables the whole cgroup rather than tempting fate with this
on-demand craziness.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Lai Jiangshan [Sat, 15 Feb 2014 14:02:28 +0000 (22:02 +0800)]
workqueue: ensure @task is valid across kthread_stop()
commit
5bdfff96c69a4d5ab9c49e60abf9e070ecd2acbb upstream.
When a kworker should die, the kworkre is notified through WORKER_DIE
flag instead of kthread_should_stop(). This, IIRC, is primarily to
keep the test synchronized inside worker_pool lock. WORKER_DIE is
first set while holding pool->lock, the lock is dropped and
kthread_stop() is called.
Unfortunately, this means that there's a slight chance that the target
kworker may see WORKER_DIE before kthread_stop() finishes and exits
and frees the target task before or during kthread_stop().
Fix it by pinning the target task before setting WORKER_DIE and
putting it after kthread_stop() is done.
tj: Improved patch description and comment. Moved pinning above
WORKER_DIE for better signify what it's protecting.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Aleksander Morgado [Wed, 12 Feb 2014 15:04:45 +0000 (16:04 +0100)]
USB: serial: option: blacklist interface 4 for Cinterion PHS8 and PXS8
commit
12df84d4a80278a5b1abfec3206795291da52fc9 upstream.
This interface is to be handled by the qmi_wwan driver.
CC: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com>
CC: Christian Schmiedl <christian.schmiedl@gemalto.com>
CC: Nicolaus Colberg <nicolaus.colberg@gemalto.com>
CC: David McCullough <david.mccullough@accelecon.com>
Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alan Stern [Thu, 13 Feb 2014 20:49:17 +0000 (15:49 -0500)]
USB: EHCI: add delay during suspend to prevent erroneous wakeups
commit
3e8d6d85adedc59115a564c0a54b36e42087c4d9 upstream.
High-speed USB connections revert back to full-speed signalling when
the device goes into suspend. This takes several milliseconds, and
during that time it's not possible to tell reliably whether the device
has been disconnected.
On some platforms, the Wake-On-Disconnect circuitry gets confused
during this intermediate state. It generates a false wakeup signal,
which can prevent the controller from going to sleep.
To avoid this problem, this patch adds a 5-ms delay to the
ehci_bus_suspend() routine if any ports have to switch over to
full-speed signalling. (Actually, the delay was already present for
devices using a particular kind of PHY power management; the patch
merely causes the delay to be used more widely.)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Peter Chen <Peter.Chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2:
- Adjust context
- s/has_tdi_phy_lpm/has_hostpc/
- Always re-lock ehci->lock after the sleep]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Levente Kurusa [Tue, 18 Feb 2014 15:22:17 +0000 (10:22 -0500)]
ahci: disable NCQ on Samsung pci-e SSDs on macbooks
commit
67809f85d31eac600f6b28defa5386c9d2a13b1d upstream.
Samsung's pci-e SSDs with device ID 0x1600 which are found on some
macbooks time out on NCQ commands. Blacklist NCQ on the device so
that the affected machines can at least boot.
Original-patch-by: Levente Kurusa <levex@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=60731
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Vinayak Kale [Wed, 12 Feb 2014 06:30:01 +0000 (07:30 +0100)]
ARM: 7957/1: add DSB after icache flush in __flush_icache_all()
commit
39544ac9df20f73e49fc6b9ac19ff533388c82c0 upstream.
Add DSB after icache flush to complete the cache maintenance operation.
Signed-off-by: Vinayak Kale <vkale@apm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Chen Gang [Sat, 1 Feb 2014 12:35:54 +0000 (20:35 +0800)]
avr32: Makefile: add '-D__linux__' flag for gcc-4.4.7 use
commit
8d80390cfc9434d5aa4fb9e5f9768a66b30cb8a6 upstream.
For avr32 cross compiler, do not define '__linux__' internally, so it
will cause issue with allmodconfig.
The related error:
CC [M] fs/coda/psdev.o
In file included from include/linux/coda.h:64,
from fs/coda/psdev.c:45:
include/uapi/linux/coda.h:221: error: expected specifier-qualifier-list before 'u_quad_t'
The related toolchain version (which only download, not re-compile):
[root@gchen linux-next]# /upstream/toolchain/download/avr32-gnu-toolchain-linux_x86/bin/avr32-gcc -v
Using built-in specs.
Target: avr32
Configured with: /data2/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/src/gcc/configure --target=avr32 --host=i686-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86 --enable-languages=c,c++ --disable-nls --disable-libssp --disable-libstdcxx-pch --with-dwarf2 --enable-version-specific-runtime-libs --disable-shared --enable-doc --with-mpfr-lib=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86/lib --with-mpfr-include=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86/include --with-gmp=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86 --with-mpc=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86 --enable-__cxa_atexit --disable-shared --with-newlib --with-pkgversion=AVR_32_bit_GNU_Toolchain_3.4.2_435 --with-bugurl=http://www
.atmel.com/avr
Thread model: single
gcc version 4.4.7 (AVR_32_bit_GNU_Toolchain_3.4.2_435)
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Acked-by: Hans-Christian Egtvedt <hegtvedt@cisco.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Gortmaker [Fri, 10 Jan 2014 14:29:39 +0000 (09:29 -0500)]
avr32: fix missing module.h causing build failure in mimc200/fram.c
commit
5745d6a41a4f4aec29e2ccd591c6fb09ed73a955 upstream.
Causing this:
In file included from arch/avr32/boards/mimc200/fram.c:13:
include/linux/miscdevice.h:51: error: field 'list' has incomplete type
include/linux/miscdevice.h:55: error: expected specifier-qualifier-list before 'mode_t'
arch/avr32/boards/mimc200/fram.c:42: error: 'THIS_MODULE' undeclared here (not in a function)
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Clemens Ladisch [Sun, 16 Feb 2014 16:11:10 +0000 (17:11 +0100)]
ALSA: usb-audio: work around KEF X300A firmware bug
commit
624aef494f86ed0c58056361c06347ad62b26806 upstream.
When the driver tries to access Function Unit 10, the KEF X300A
speakers' firmware apparently locks up, making even PCM streaming
impossible. Work around this by ignoring this FU.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Linus Walleij [Thu, 13 Feb 2014 09:39:01 +0000 (10:39 +0100)]
dma: ste_dma40: don't dereference free:d descriptor
commit
e9baa9d9d520fb0e24cca671e430689de2d4a4b2 upstream.
It appears that in the DMA40 driver the DMA tasklet will very
often dereference memory for a descriptor just free:d from the
DMA40 slab. Nothing happens because no other part of the driver
has yet had a chance to claim this memory, but it's really
nasty to dereference free:d memory, so let's check the flag
before the descriptor is free and store it in a bool variable.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Theodore Ts'o [Mon, 17 Feb 2014 00:29:32 +0000 (19:29 -0500)]
ext4: don't leave i_crtime.tv_sec uninitialized
commit
19ea80603715d473600cd993b9987bc97d042e02 upstream.
If the i_crtime field is not present in the inode, don't leave the
field uninitialized.
Fixes:
ef7f38359 ("ext4: Add nanosecond timestamps")
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Tested-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Bjorn Helgaas [Fri, 14 Feb 2014 20:48:16 +0000 (13:48 -0700)]
PCI: Enable INTx if BIOS left them disabled
commit
1f42db786b14a31bf807fc41ee5583a00c08fcb1 upstream.
Some firmware leaves the Interrupt Disable bit set even if the device uses
INTx interrupts. Clear Interrupt Disable so we get those interrupts.
Based on the report mentioned below, if the user selects the "EHCI only"
option in the Intel Baytrail BIOS, the EHCI device is handed off to the OS
with the PCI_COMMAND_INTX_DISABLE bit set.
Link: http://lkml.kernel.org/r/20140114181721.GC12126@xanatos
Link: https://bugzilla.kernel.org/show_bug.cgi?id=70601
Reported-by: Chris Cheng <chris.cheng@atrustcorp.com>
Reported-and-tested-by: Jamie Chen <jamie.chen@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Borislav Petkov [Wed, 12 Feb 2014 17:15:00 +0000 (18:15 +0100)]
EDAC: Correct workqueue setup path
commit
cb6ef42e516cb8948f15e4b70dc03af8020050a2 upstream.
We're using edac_mc_workq_setup() both on the init path, when
we load an edac driver and when we change the polling period
(edac_mc_reset_delay_period) through /sys/.../edac_mc_poll_msec.
On that second path we don't need to init the workqueue which has been
initialized already.
Thanks to Tejun for workqueue insights.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1391457913-881-1-git-send-email-prarit@redhat.com
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mike Marciniszyn [Wed, 12 Feb 2014 16:54:15 +0000 (11:54 -0500)]
IB/qib: Add missing serdes init sequence
commit
2f75e12c4457a9b3d042c0a0d748fa198dc2ffaf upstream.
Research has shown that commit
a77fcf895046 ("IB/qib: Use a single
txselect module parameter for serdes tuning") missed a key serdes init
sequence.
This patch add that sequence.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Stanislaw Gruszka [Mon, 10 Feb 2014 21:38:28 +0000 (22:38 +0100)]
rtl8187: fix regression on MIPS without coherent DMA
commit
b6213e413a4e0c66548153516b074df14f9d08e0 upstream.
This patch fixes regression caused by commit
a16dad77634 "MIPS: Fix
potencial corruption". That commit fixes one corruption scenario in
cost of adding another one, which actually start to cause crashes
on Yeeloong laptop when rtl8187 driver is used.
For correct DMA read operation on machines without DMA coherence, kernel
have to invalidate cache, such it will refill later with new data that
device wrote to memory, when that data is needed to process. We can only
invalidate full cache line. Hence when cache line includes both dma
buffer and some other data (written in cache, but not yet in main
memory), the other data can not hit memory due to invalidation. That
happen on rtl8187 where struct rtl8187_priv fields are located just
before and after small buffers that are passed to USB layer and DMA
is performed on them.
To fix the problem we align buffers and reserve space after them to make
them match cache line.
This patch does not resolve all possible MIPS problems entirely, for
that we have to assure that we always map cache aligned buffers for DMA,
what can be complex or even not possible. But patch fixes visible and
reproducible regression and seems other possible corruptions do not
happen in practice, since Yeeloong laptop works stable without rtl8187
driver.
Bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=54391
Reported-by: Petr Pisar <petr.pisar@atlas.cz>
Bisected-by: Tom Li <biergaizi2009@gmail.com>
Reported-and-tested-by: Tom Li <biergaizi2009@gmail.com>
Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Acked-by: Larry Finger <Larry.Finger@lwfinger.next>
Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ralf Baechle [Sat, 9 Jun 2012 19:48:47 +0000 (20:48 +0100)]
MIPS: Fix potencial corruption
commit
a16dad7763420a3b46cff1e703a9070827796cfc upstream.
Normally r4k_dma_cache_inv should only ever be called with cacheline
aligned addresses. If however, it isn't there is the theoretical
possibility of data corruption. There is no correct way of handling this
and anyway, it should only happen if the DMA API is used incorrectly
so drop
There is a different corruption scenario with these CACHE instructions
removed but again there is no way of handling this correctly and it can
be triggered only through incorrect use of the DMA API.
So just get rid of the complexity.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: James Rodriguez <jamesr@juniper.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Olivier Langlois [Sat, 1 Feb 2014 06:11:09 +0000 (01:11 -0500)]
rtlwifi: rtl8192ce: Fix too long disable of IRQs
commit
f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 upstream.
rtl8192ce is disabling for too long the local interrupts during hw initiatialisation when performing scans
The observable symptoms in dmesg can be:
- underruns from ALSA playback
- clock freezes (tstamps do not change for several dmesg entries until irqs are finaly reenabled):
[ 250.817669] rtlwifi:rtl_op_config():<0-0-0> 0x100
[ 250.817685] rtl8192ce:_rtl92ce_phy_set_rf_power_state():<0-1-0> IPS Set eRf nic enable
[ 250.817732] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.817796] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.817910] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818024] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818139] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818253] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818367] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818472] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818472] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818472] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818472] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
18051d59:11
[ 250.818472] rtl8192ce:_rtl92ce_init_mac():<0-1-0> reg0xec:
98053f15:10
[ 250.818472] rtl8192ce:rtl92ce_sw_led_on():<0-1-0> LedAddr:4E ledpin=1
[ 250.818472] rtl8192c_common:rtl92c_download_fw():<0-1-0> Firmware Version(49), Signature(0x88c1),Size(32)
[ 250.818472] rtl8192ce:rtl92ce_enable_hw_security_config():<0-1-0> PairwiseEncAlgorithm = 0 GroupEncAlgorithm = 0
[ 250.818472] rtl8192ce:rtl92ce_enable_hw_security_config():<0-1-0> The SECR-value cc
[ 250.818472] rtl8192c_common:rtl92c_dm_check_txpower_tracking_thermal_meter():<0-1-0> Schedule TxPowerTracking direct call!!
[ 250.818472] rtl8192c_common:rtl92c_dm_txpower_tracking_callback_thermalmeter():<0-1-0> rtl92c_dm_txpower_tracking_callback_thermalmeter
[ 250.818472] rtl8192c_common:rtl92c_dm_txpower_tracking_callback_thermalmeter():<0-1-0> Readback Thermal Meter = 0xe pre thermal meter 0xf eeprom_thermalmeter 0xf
[ 250.818472] rtl8192c_common:rtl92c_dm_txpower_tracking_callback_thermalmeter():<0-1-0> Initial pathA ele_d reg0xc80 = 0x40000000, ofdm_index=0xc
[ 250.818472] rtl8192c_common:rtl92c_dm_txpower_tracking_callback_thermalmeter():<0-1-0> Initial reg0xa24 = 0x90e1317, cck_index=0xc, ch14 0
[ 250.818472] rtl8192c_common:rtl92c_dm_txpower_tracking_callback_thermalmeter():<0-1-0> Readback Thermal Meter = 0xe pre thermal meter 0xf eeprom_thermalmeter 0xf delta 0x1 delta_lck 0x0 delta_iqk 0x0
[ 250.818472] rtl8192c_common:rtl92c_dm_txpower_tracking_callback_thermalmeter():<0-1-0> <===
[ 250.818472] rtl8192c_common:rtl92c_dm_initialize_txpower_tracking_thermalmeter():<0-1-0> pMgntInfo->txpower_tracking = 1
[ 250.818472] rtl8192ce:rtl92ce_led_control():<0-1-0> ledaction 3
[ 250.818472] rtl8192ce:rtl92ce_sw_led_on():<0-1-0> LedAddr:4E ledpin=1
[ 250.818472] rtlwifi:rtl_ips_nic_on():<0-1-0> before spin_unlock_irqrestore
[ 251.154656] PCM: Lost interrupts? [Q]-0 (stream=0, delta=15903, new_hw_ptr=293408, old_hw_ptr=277505)
The exact code flow that causes that is:
1. wpa_supplicant send a start_scan request to the nl80211 driver
2. mac80211 module call rtl_op_config with IEEE80211_CONF_CHANGE_IDLE
3. rtl_ips_nic_on is called which disable local irqs
4. rtl92c_phy_set_rf_power_state() is called
5. rtl_ps_enable_nic() is called and hw_init()is executed and then the interrupts on the device are enabled
A good solution could be to refactor the code to avoid calling rtl92ce_hw_init() with the irqs disabled
but a quick and dirty solution that has proven to work is
to reenable the irqs during the function rtl92ce_hw_init().
I think that it is safe doing so since the device interrupt will only be enabled after the init function succeed.
Signed-off-by: Olivier Langlois <olivier@trillion01.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
NeilBrown [Fri, 7 Feb 2014 06:10:26 +0000 (17:10 +1100)]
lockd: send correct lock when granting a delayed lock.
commit
2ec197db1a56c9269d75e965f14c344b58b2a4f6 upstream.
If an NFS client attempts to get a lock (using NLM) and the lock is
not available, the server will remember the request and when the lock
becomes available it will send a GRANT request to the client to
provide the lock.
If the client already held an adjacent lock, the GRANT callback will
report the union of the existing and new locks, which can confuse the
client.
This happens because __posix_lock_file (called by vfs_lock_file)
updates the passed-in file_lock structure when adjacent or
over-lapping locks are found.
To avoid this problem we take a copy of the two fields that can
be changed (fl_start and fl_end) before the call and restore them
afterwards.
An alternate would be to allocate a 'struct file_lock', initialise it,
use locks_copy_lock() to take a copy, then locks_release_private()
after the vfs_lock_file() call. But that is a lot more work.
Reported-by: Olaf Kirch <okir@suse.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
--
v1 had a couple of issues (large on-stack struct and didn't really work properly).
This version is much better tested.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jani Nikula [Tue, 11 Feb 2014 09:52:05 +0000 (11:52 +0200)]
drm/i915/dp: add native aux defer retry limit
commit
f51a44b9a6c4982cc25bfb3727de9bb893621ebc upstream.
Retrying indefinitely places too much trust on the aux implementation of
the sink devices.
Reported-by: Daniel Martin <consume.noise@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71267
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Theodore Ts'o <tytso@mit.edu>
Tested-by: Sree Harsha Totakura <freedesktop@h.totakura.in>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jani Nikula [Tue, 11 Feb 2014 09:52:04 +0000 (11:52 +0200)]
drm/i915/dp: increase native aux defer retry timeout
commit
04eada25d1f72efdecd32d702706594f81de65d5 upstream.
Give more slack to sink devices before retrying on native aux
defer. AFAICT the 100 us timeout was not based on the DP spec.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Steven Noonan [Thu, 13 Feb 2014 07:01:07 +0000 (23:01 -0800)]
compiler/gcc4: Make quirk for asm_volatile_goto() unconditional
commit
a9f180345f5378ac87d80ed0bea55ba421d83859 upstream.
I started noticing problems with KVM guest destruction on Linux
3.12+, where guest memory wasn't being cleaned up. I bisected it
down to the commit introducing the new 'asm goto'-based atomics,
and found this quirk was later applied to those.
Unfortunately, even with GCC 4.8.2 (which ostensibly fixed the
known 'asm goto' bug) I am still getting some kind of
miscompilation. If I enable the asm_volatile_goto quirk for my
compiler, KVM guests are destroyed correctly and the memory is
cleaned up.
So make the quirk unconditional for now, until bug is found
and fixed.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Noonan <steven@uplinklabs.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/1392274867-15236-1-git-send-email-steven@uplinklabs.net
Link: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Oleg Nesterov [Wed, 5 Feb 2014 22:12:45 +0000 (03:42 +0530)]
md/raid5: Fix CPU hotplug callback registration
commit
789b5e0315284463617e106baad360cb9e8db3ac upstream.
Subsystems that want to register CPU hotplug callbacks, as well as perform
initialization for the CPUs that are already online, often do it as shown
below:
get_online_cpus();
for_each_online_cpu(cpu)
init_cpu(cpu);
register_cpu_notifier(&foobar_cpu_notifier);
put_online_cpus();
This is wrong, since it is prone to ABBA deadlocks involving the
cpu_add_remove_lock and the cpu_hotplug.lock (when running concurrently
with CPU hotplug operations).
Interestingly, the raid5 code can actually prevent double initialization and
hence can use the following simplified form of callback registration:
register_cpu_notifier(&foobar_cpu_notifier);
get_online_cpus();
for_each_online_cpu(cpu)
init_cpu(cpu);
put_online_cpus();
A hotplug operation that occurs between registering the notifier and calling
get_online_cpus(), won't disrupt anything, because the code takes care to
perform the memory allocations only once.
So reorganize the code in raid5 this way to fix the deadlock with callback
registration.
Cc: linux-raid@vger.kernel.org
Fixes:
36d1c6476be51101778882897b315bd928c8c7b5
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
[Srivatsa: Fixed the unregister_cpu_notifier() deadlock, added the
free_scratch_buffer() helper to condense code further and wrote the changelog.]
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jens Axboe [Wed, 12 Feb 2014 16:34:01 +0000 (09:34 -0700)]
block: add cond_resched() to potentially long running ioctl discard loop
commit
c8123f8c9cb517403b51aa41c3c46ff5e10b2c17 upstream.
When mkfs issues a full device discard and the device only
supports discards of a smallish size, we can loop in
blkdev_issue_discard() for a long time. If preempt isn't enabled,
this can turn into a softlock situation and the kernel will
start complaining.
Add an explicit cond_resched() at the end of the loop to avoid
that.
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Raymond Wanyoike [Sun, 9 Feb 2014 08:59:46 +0000 (11:59 +0300)]
usb: option: blacklist ZTE MF667 net interface
commit
3635c7e2d59f7861afa6fa5e87e2a58860ff514d upstream.
Interface #5 of 19d2:1270 is a net interface which has been submitted to the
qmi_wwan driver so consequently remove it from the option driver.
Signed-off-by: Raymond Wanyoike <raymond.wanyoike@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ville Syrjälä [Tue, 11 Feb 2014 17:52:06 +0000 (19:52 +0200)]
drm/i915: Prevent MI_DISPLAY_FLIP straddling two cachelines on IVB
commit
f66fab8e1cd6b3127ba4c5c0d11539fbe1de1e36 upstream.
According to BSpec the entire MI_DISPLAY_FLIP packet must be contained
in a single cacheline. Make sure that happens.
v2: Use intel_ring_begin_cacheline_safe()
v3: Use intel_ring_cacheline_align() (Chris)
Cc: Bjoern C <lkml@call-home.ch>
Cc: Alexandru DAMIAN <alexandru.damian@intel.com>
Cc: Enrico Tagliavini <enrico.tagliavini@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74053
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ville Syrjälä [Tue, 11 Feb 2014 17:52:05 +0000 (19:52 +0200)]
drm/i915: Add intel_ring_cachline_align()
commit
753b1ad4a281b0663329409d410243e91825c323 upstream.
intel_ring_cachline_align() emits MI_NOOPs until the ring tail is
aligned to a cacheline boundary.
Cc: Bjoern C <lkml@call-home.ch>
Cc: Alexandru DAMIAN <alexandru.damian@intel.com>
Cc: Enrico Tagliavini <enrico.tagliavini@gmail.com>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Steven Rostedt (Red Hat) [Tue, 11 Feb 2014 18:38:54 +0000 (13:38 -0500)]
ring-buffer: Fix first commit on sub-buffer having non-zero delta
commit
d651aa1d68a2f0a7ee65697b04c6a92f8c0a12f2 upstream.
Each sub-buffer (buffer page) has a full 64 bit timestamp. The events on
that page use a 27 bit delta against that timestamp in order to save on
bits written to the ring buffer. If the time between events is larger than
what the 27 bits can hold, a "time extend" event is added to hold the
entire 64 bit timestamp again and the events after that hold a delta from
that timestamp.
As a "time extend" is always paired with an event, it is logical to just
allocate the event with the time extend, to make things a bit more efficient.
Unfortunately, when the pairing code was written, it removed the "delta = 0"
from the first commit on a page, causing the events on the page to be
slightly skewed.
Fixes:
69d1b839f7ee "ring-buffer: Bind time extend and data events together"
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
David Vrabel [Mon, 10 Feb 2014 13:54:02 +0000 (13:54 +0000)]
xen: install xen/gntdev.h and xen/gntalloc.h
commit
564eb714f5f09ac733c26860d5f0831f213fbdf1 upstream.
xen/gntdev.h and xen/gntalloc.h both provide userspace ABIs so they
should be installed.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
[bwh: Backported to 3.2: no renaming is required]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Trond Myklebust [Tue, 11 Feb 2014 14:15:54 +0000 (09:15 -0500)]
SUNRPC: Fix races in xs_nospace()
commit
06ea0bfe6e6043cb56a78935a19f6f8ebc636226 upstream.
When a send failure occurs due to the socket being out of buffer space,
we call xs_nospace() in order to have the RPC task wait until the
socket has drained enough to make it worth while trying again.
The current patch fixes a race in which the socket is drained before
we get round to setting up the machinery in xs_nospace(), and which
is reported to cause hangs.
Link: http://lkml.kernel.org/r/20140210170315.33dfc621@notabene.brown
Fixes:
a9a6b52ee1ba (SUNRPC: Don't start the retransmission timer...)
Reported-by: Neil Brown <neilb@suse.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Eric W. Biederman [Mon, 10 Feb 2014 22:25:41 +0000 (14:25 -0800)]
fs/file.c:fdtable: avoid triggering OOMs from alloc_fdmem
commit
96c7a2ff21501691587e1ae969b83cbec8b78e08 upstream.
Recently due to a spike in connections per second memcached on 3
separate boxes triggered the OOM killer from accept. At the time the
OOM killer was triggered there was 4GB out of 36GB free in zone 1. The
problem was that alloc_fdtable was allocating an order 3 page (32KiB) to
hold a bitmap, and there was sufficient fragmentation that the largest
page available was 8KiB.
I find the logic that PAGE_ALLOC_COSTLY_ORDER can't fail pretty dubious
but I do agree that order 3 allocations are very likely to succeed.
There are always pathologies where order > 0 allocations can fail when
there are copious amounts of free memory available. Using the pigeon
hole principle it is easy to show that it requires 1 page more than 50%
of the pages being free to guarantee an order 1 (8KiB) allocation will
succeed, 1 page more than 75% of the pages being free to guarantee an
order 2 (16KiB) allocation will succeed and 1 page more than 87.5% of
the pages being free to guarantee an order 3 allocate will succeed.
A server churning memory with a lot of small requests and replies like
memcached is a common case that if anything can will skew the odds
against large pages being available.
Therefore let's not give external applications a practical way to kill
linux server applications, and specify __GFP_NORETRY to the kmalloc in
alloc_fdmem. Unless I am misreading the code and by the time the code
reaches should_alloc_retry in __alloc_pages_slowpath (where
__GFP_NORETRY becomes signification). We have already tried everything
reasonable to allocate a page and the only thing left to do is wait. So
not waiting and falling back to vmalloc immediately seems like the
reasonable thing to do even if there wasn't a chance of triggering the
OOM killer.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Cong Wang <cwang@twopensource.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Will Deacon [Fri, 7 Feb 2014 18:12:32 +0000 (19:12 +0100)]
ARM: 7955/1: spinlock: ensure we have a compiler barrier before sev
commit
7c8746a9eb287642deaad0e7c2cdf482dce5e4be upstream.
When unlocking a spinlock, we require the following, strictly ordered
sequence of events:
<barrier> /* dmb */
<unlock>
<barrier> /* dsb */
<sev>
Whilst the code does indeed reflect this in terms of the architecture,
the final <barrier> + <sev> have been contracted into a single inline
asm without a "memory" clobber, therefore the compiler is at liberty to
reorder the unlock to the end of the above sequence. In such a case,
a waiting CPU may be woken up before the lock has been unlocked, leading
to extremely poor performance.
This patch reworks the dsb_sev() function to make use of the dsb()
macro and ensure ordering against the unlock.
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[bwh: Backported to 3.2: 'ishst' variant is not used here]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Will Deacon [Fri, 7 Feb 2014 18:12:20 +0000 (19:12 +0100)]
ARM: 7953/1: mm: ensure TLB invalidation is complete before enabling MMU
commit
bae0ca2bc550d1ec6a118fb8f2696f18c4da3d8e upstream.
During __v{6,7}_setup, we invalidate the TLBs since we are about to
enable the MMU on return to head.S. Unfortunately, without a subsequent
dsb instruction, the invalidation is not guaranteed to have completed by
the time we write to the sctlr, potentially exposing us to junk/stale
translations cached in the TLB.
This patch reworks the init functions so that the dsb used to ensure
completion of cache/predictor maintenance is also used to ensure
completion of the TLB invalidation.
Reported-by: Albin Tonnerre <Albin.Tonnerre@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jan Moskyto Matejka [Fri, 7 Feb 2014 18:15:11 +0000 (19:15 +0100)]
Modpost: fixed USB alias generation for ranges including 0x9 and 0xA
commit
03b56329f9bb5a1cb73d7dc659d529a9a9bf3acc upstream.
Commit
afe2dab4f6 ("USB: add hex/bcd detection to usb modalias generation")
changed the routine that generates alias ranges. Before that change, only
digits 0-9 were supported; the commit tried to fix the case when the range
includes higher values than 0x9.
Unfortunately, the commit didn't fix the case when the range includes both
0x9 and 0xA, meaning that the final range must look like [x-9A-y] where
x <= 0x9 and y >= 0xA -- instead the [x-9A-x] range was produced.
Modprobe doesn't complain as it sees no difference between no-match and
bad-pattern results of fnmatch().
Fixing this simple bug to fix the aliases.
Also changing the hardcoded beginning of the range to uppercase as all the
other letters are also uppercase in the device version numbers.
Fortunately, this affects only the dvb-usb-dib0700 module, AFAIK.
Signed-off-by: Jan Moskyto Matejka <mq@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
David Vrabel [Tue, 4 Feb 2014 18:53:56 +0000 (18:53 +0000)]
xen-blkfront: handle backend CLOSED without CLOSING
commit
3661371701e714f0cea4120f6a365340858fb4e4 upstream.
Backend drivers shouldn't transistion to CLOSED unless the frontend is
CLOSED. If a backend does transition to CLOSED too soon then the
frontend may not see the CLOSING state and will not properly shutdown.
So, treat an unexpected backend CLOSED state the same as CLOSING.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
H Hartley Sweeten [Wed, 5 Feb 2014 21:59:53 +0000 (14:59 -0700)]
staging: comedi: adv_pci1710: fix analog output readback value
commit
1e85c1ea1ff2a60659e790ef8ec76c7339445841 upstream.
The last value written to a analog output channel is cached in the
private data of this driver for readback.
Currently, the wrong value is cached in the (*insn_write) functions.
The current code stores the data[n] value for readback afer the loop
has written all the values. At this time 'n' points past the end of
the data array.
Fix the functions by using a local variable to hold the data being
written to the analog output channel. This variable is then used
after the loop is complete to store the readback value. The current
value is retrieved before the loop in case no values are actually
written..
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Lars Poeschel [Tue, 7 Jan 2014 12:34:37 +0000 (13:34 +0100)]
tty: n_gsm: Fix for modems with brk in modem status control
commit
3ac06b905655b3ef2fd2196bab36e4587e1e4e4f upstream.
3GPP TS 07.10 states in section 5.4.6.3.7:
"The length byte contains the value 2 or 3 ... depending on the break
signal." The break byte is optional and if it is sent, the length is
3. In fact the driver was not able to work with modems that send this
break byte in their modem status control message. If the modem just
sends the break byte if it is really set, then weird things might
happen.
The code for deconding the modem status to the internal linux
presentation in gsm_process_modem has already a big comment about
this 2 or 3 byte length thing and it is already able to decode the
brk, but the code calling the gsm_process_modem function in
gsm_control_modem does not encode it and hand it over the right way.
This patch fixes this.
Without this fix if the modem sends the brk byte in it's modem status
control message the driver will hang when opening a muxed channel.
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Bolle [Tue, 4 Feb 2014 22:23:12 +0000 (23:23 +0100)]
raw: test against runtime value of max_raw_minors
commit
5bbb2ae3d6f896f8d2082d1eceb6131c2420b7cf upstream.
bind_get() checks the device number it is called with. It uses
MAX_RAW_MINORS for the upper bound. But MAX_RAW_MINORS is set at compile
time while the actual number of raw devices can be set at runtime. This
means the test can either be too strict or too lenient. And if the test
ends up being too lenient bind_get() might try to access memory beyond
what was allocated for "raw_devices".
So check against the runtime value (max_raw_minors) in this function.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
K. Y. Srinivasan [Thu, 16 Jan 2014 19:59:58 +0000 (11:59 -0800)]
Drivers: hv: vmbus: Don't timeout during the initial connection with host
commit
269f979467cf49f2ea8132316c1f00f8c9678f7c upstream.
When the guest attempts to connect with the host when there may already be a
connection with the host (as would be the case during the kdump/kexec path),
it is difficult to guarantee timely response from the host. Starting with
WS2012 R2, the host supports this ability to re-connect with the host
(explicitly to support kexec). Prior to responding to the guest, the host
needs to ensure that device states based on the previous connection to
the host have been properly torn down. This may introduce unbounded delays.
To deal with this issue, don't do a timed wait during the initial connect
with the host.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
KOSAKI Motohiro [Thu, 6 Feb 2014 20:04:28 +0000 (12:04 -0800)]
mm: __set_page_dirty uses spin_lock_irqsave instead of spin_lock_irq
commit
227d53b397a32a7614667b3ecaf1d89902fb6c12 upstream.
To use spin_{un}lock_irq is dangerous if caller disabled interrupt.
During aio buffer migration, we have a possibility to see the following
call stack.
aio_migratepage [disable interrupt]
migrate_page_copy
clear_page_dirty_for_io
set_page_dirty
__set_page_dirty_buffers
__set_page_dirty
spin_lock_irq
This mean, current aio migration is a deadlockable. spin_lock_irqsave
is a safer alternative and we should use it.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reported-by: David Rientjes rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
KOSAKI Motohiro [Thu, 6 Feb 2014 20:04:24 +0000 (12:04 -0800)]
mm: __set_page_dirty_nobuffers() uses spin_lock_irqsave() instead of spin_lock_irq()
commit
a85d9df1ea1d23682a0ed1e100e6965006595d06 upstream.
During aio stress test, we observed the following lockdep warning. This
mean AIO+numa_balancing is currently deadlockable.
The problem is, aio_migratepage disable interrupt, but
__set_page_dirty_nobuffers unintentionally enable it again.
Generally, all helper function should use spin_lock_irqsave() instead of
spin_lock_irq() because they don't know caller at all.
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(&ctx->completion_lock)->rlock);
<Interrupt>
lock(&(&ctx->completion_lock)->rlock);
*** DEADLOCK ***
dump_stack+0x19/0x1b
print_usage_bug+0x1f7/0x208
mark_lock+0x21d/0x2a0
mark_held_locks+0xb9/0x140
trace_hardirqs_on_caller+0x105/0x1d0
trace_hardirqs_on+0xd/0x10
_raw_spin_unlock_irq+0x2c/0x50
__set_page_dirty_nobuffers+0x8c/0xf0
migrate_page_copy+0x434/0x540
aio_migratepage+0xb1/0x140
move_to_new_page+0x7d/0x230
migrate_pages+0x5e5/0x700
migrate_misplaced_page+0xbc/0xf0
do_numa_page+0x102/0x190
handle_pte_fault+0x241/0x970
handle_mm_fault+0x265/0x370
__do_page_fault+0x172/0x5a0
do_page_fault+0x1a/0x70
page_fault+0x28/0x30
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Weijie Yang [Thu, 6 Feb 2014 20:04:23 +0000 (12:04 -0800)]
mm/swap: fix race on swap_info reuse between swapoff and swapon
commit
f893ab41e4dae2fe8991faf5d86d029068d1ef3a upstream.
swapoff clear swap_info's SWP_USED flag prematurely and free its
resources after that. A concurrent swapon will reuse this swap_info
while its previous resources are not cleared completely.
These late freed resources are:
- p->percpu_cluster
- swap_cgroup_ctrl[type]
- block_device setting
- inode->i_flags &= ~S_SWAPFILE
This patch clears the SWP_USED flag after all its resources are freed,
so that swapon can reuse this swap_info by alloc_swap_info() safely.
[akpm@linux-foundation.org: tidy up code comment]
Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Peter Oberparleiter [Thu, 6 Feb 2014 14:58:20 +0000 (15:58 +0100)]
x86, hweight: Fix BUG when booting with CONFIG_GCOV_PROFILE_ALL=y
commit
6583327c4dd55acbbf2a6f25e775b28b3abf9a42 upstream.
Commit
d61931d89b, "x86: Add optimized popcnt variants" introduced
compile flag -fcall-saved-rdi for lib/hweight.c. When combined with
options -fprofile-arcs and -O2, this flag causes gcc to generate
broken constructor code. As a result, a 64 bit x86 kernel compiled
with CONFIG_GCOV_PROFILE_ALL=y prints message "gcov: could not create
file" and runs into sproadic BUGs during boot.
The gcc people indicate that these kinds of problems are endemic when
using ad hoc calling conventions. It is therefore best to treat any
file compiled with ad hoc calling conventions as an isolated
environment and avoid things like profiling or coverage analysis,
since those subsystems assume a "normal" calling conventions.
This patch avoids the bug by excluding lib/hweight.o from coverage
profiling.
Reported-by: Meelis Roos <mroos@linux.ee>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/52F3A30C.7050205@linux.vnet.ibm.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Fri, 24 Jan 2014 21:41:36 +0000 (16:41 -0500)]
time: Fix overflow when HZ is smaller than 60
commit
80d767d770fd9c697e434fd080c2db7b5c60c6dd upstream.
When compiling for the IA-64 ski emulator, HZ is set to 32 because the
emulation is slow and we don't want to waste too many cycles processing
timers. Alpha also has an option to set HZ to 32.
This causes integer underflow in
kernel/time/jiffies.c:
kernel/time/jiffies.c:66:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
.mult = NSEC_PER_JIFFY << JIFFIES_SHIFT, /* details above */
^
This patch reduces the JIFFIES_SHIFT value to avoid the overflow.
Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Link: http://lkml.kernel.org/r/alpine.LRH.2.02.1401241639100.23871@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Johannes Berg [Fri, 31 Jan 2014 23:16:23 +0000 (00:16 +0100)]
mac80211: fix fragmentation code, particularly for encryption
commit
338f977f4eb441e69bb9a46eaa0ac715c931a67f upstream.
The "new" fragmentation code (since my rewrite almost 5 years ago)
erroneously sets skb->len rather than using skb_trim() to adjust
the length of the first fragment after copying out all the others.
This leaves the skb tail pointer pointing to after where the data
originally ended, and thus causes the encryption MIC to be written
at that point, rather than where it belongs: immediately after the
data.
The impact of this is that if software encryption is done, then
a) encryption doesn't work for the first fragment, the connection
becomes unusable as the first fragment will never be properly
verified at the receiver, the MIC is practically guaranteed to
be wrong
b) we leak up to 8 bytes of plaintext (!) of the packet out into
the air
This is only mitigated by the fact that many devices are capable
of doing encryption in hardware, in which case this can't happen
as the tail pointer is irrelevant in that case. Additionally,
fragmentation is not used very frequently and would normally have
to be configured manually.
Fix this by using skb_trim() properly.
Fixes:
2de8e0d999b8 ("mac80211: rewrite fragmentation")
Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ulrich Hahn [Sun, 2 Feb 2014 13:42:52 +0000 (14:42 +0100)]
USB: ftdi_sio: add Tagsys RFID Reader IDs
commit
76f24e3f39a1a94bab0d54e98899d64abcd9f69c upstream.
Adding two more IDs to the ftdi_sio usb serial driver.
It now connects Tagsys RFID readers.
There might be more IDs out there for other Tagsys models.
Signed-off-by: Ulrich Hahn <uhahn@eanco.de>
Cc: Johan Hovold <johan@hovold.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Stephen Smalley [Thu, 30 Jan 2014 16:26:59 +0000 (11:26 -0500)]
SELinux: Fix kernel BUG on empty security contexts.
commit
2172fa709ab32ca60e86179dc67d0857be8e2c98 upstream.
Setting an empty security context (length=0) on a file will
lead to incorrectly dereferencing the type and other fields
of the security context structure, yielding a kernel BUG.
As a zero-length security context is never valid, just reject
all such security contexts whether coming from userspace
via setxattr or coming from the filesystem upon a getxattr
request by SELinux.
Setting a security context value (empty or otherwise) unknown to
SELinux in the first place is only possible for a root process
(CAP_MAC_ADMIN), and, if running SELinux in enforcing mode, only
if the corresponding SELinux mac_admin permission is also granted
to the domain by policy. In Fedora policies, this is only allowed for
specific domains such as livecd for setting down security contexts
that are not defined in the build host policy.
Reproducer:
su
setenforce 0
touch foo
setfattr -n security.selinux foo
Caveat:
Relabeling or removing foo after doing the above may not be possible
without booting with SELinux disabled. Any subsequent access to foo
after doing the above will also trigger the BUG.
BUG output from Matthew Thode:
[ 473.893141] ------------[ cut here ]------------
[ 473.962110] kernel BUG at security/selinux/ss/services.c:654!
[ 473.995314] invalid opcode: 0000 [#6] SMP
[ 474.027196] Modules linked in:
[ 474.058118] CPU: 0 PID: 8138 Comm: ls Tainted: G D I
3.13.0-grsec #1
[ 474.116637] Hardware name: Supermicro X8ST3/X8ST3, BIOS 2.0
07/29/10
[ 474.149768] task:
ffff8805f50cd010 ti:
ffff8805f50cd488 task.ti:
ffff8805f50cd488
[ 474.183707] RIP: 0010:[<
ffffffff814681c7>] [<
ffffffff814681c7>]
context_struct_compute_av+0xce/0x308
[ 474.219954] RSP: 0018:
ffff8805c0ac3c38 EFLAGS:
00010246
[ 474.252253] RAX:
0000000000000000 RBX:
ffff8805c0ac3d94 RCX:
0000000000000100
[ 474.287018] RDX:
ffff8805e8aac000 RSI:
00000000ffffffff RDI:
ffff8805e8aaa000
[ 474.321199] RBP:
ffff8805c0ac3cb8 R08:
0000000000000010 R09:
0000000000000006
[ 474.357446] R10:
0000000000000000 R11:
ffff8805c567a000 R12:
0000000000000006
[ 474.419191] R13:
ffff8805c2b74e88 R14:
00000000000001da R15:
0000000000000000
[ 474.453816] FS:
00007f2e75220800(0000) GS:
ffff88061fc00000(0000)
knlGS:
0000000000000000
[ 474.489254] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 474.522215] CR2:
00007f2e74716090 CR3:
00000005c085e000 CR4:
00000000000207f0
[ 474.556058] Stack:
[ 474.584325]
ffff8805c0ac3c98 ffffffff811b549b ffff8805c0ac3c98
ffff8805f1190a40
[ 474.618913]
ffff8805a6202f08 ffff8805c2b74e88 00068800d0464990
ffff8805e8aac860
[ 474.653955]
ffff8805c0ac3cb8 000700068113833a ffff880606c75060
ffff8805c0ac3d94
[ 474.690461] Call Trace:
[ 474.723779] [<
ffffffff811b549b>] ? lookup_fast+0x1cd/0x22a
[ 474.778049] [<
ffffffff81468824>] security_compute_av+0xf4/0x20b
[ 474.811398] [<
ffffffff8196f419>] avc_compute_av+0x2a/0x179
[ 474.843813] [<
ffffffff8145727b>] avc_has_perm+0x45/0xf4
[ 474.875694] [<
ffffffff81457d0e>] inode_has_perm+0x2a/0x31
[ 474.907370] [<
ffffffff81457e76>] selinux_inode_getattr+0x3c/0x3e
[ 474.938726] [<
ffffffff81455cf6>] security_inode_getattr+0x1b/0x22
[ 474.970036] [<
ffffffff811b057d>] vfs_getattr+0x19/0x2d
[ 475.000618] [<
ffffffff811b05e5>] vfs_fstatat+0x54/0x91
[ 475.030402] [<
ffffffff811b063b>] vfs_lstat+0x19/0x1b
[ 475.061097] [<
ffffffff811b077e>] SyS_newlstat+0x15/0x30
[ 475.094595] [<
ffffffff8113c5c1>] ? __audit_syscall_entry+0xa1/0xc3
[ 475.148405] [<
ffffffff8197791e>] system_call_fastpath+0x16/0x1b
[ 475.179201] Code: 00 48 85 c0 48 89 45 b8 75 02 0f 0b 48 8b 45 a0 48
8b 3d 45 d0 b6 00 8b 40 08 89 c6 ff ce e8 d1 b0 06 00 48 85 c0 49 89 c7
75 02 <0f> 0b 48 8b 45 b8 4c 8b 28 eb 1e 49 8d 7d 08 be 80 01 00 00 e8
[ 475.255884] RIP [<
ffffffff814681c7>]
context_struct_compute_av+0xce/0x308
[ 475.296120] RSP <
ffff8805c0ac3c38>
[ 475.328734] ---[ end trace
f076482e9d754adc ]---
Reported-by: Matthew Thode <mthode@mthode.org>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Kleber Sacilotto de Souza [Mon, 3 Feb 2014 15:31:03 +0000 (13:31 -0200)]
of: fix PCI bus match for PCIe slots
commit
14e2abb732e485ee57d9d5b2cb8884652238e5c1 upstream.
On IBM pseries systems the device_type device-tree property of a PCIe
bridge contains the string "pciex". The of_bus_pci_match() function was
looking only for "pci" on this property, so in such cases the bus
matching code was falling back to the default bus, causing problems on
functions that should be using "assigned-addresses" for region address
translation. This patch fixes the problem by also looking for "pciex" on
the PCI bus match function.
v2: added comment
Signed-off-by: Kleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Benjamin Herrenschmidt [Wed, 3 Jul 2013 06:01:10 +0000 (16:01 +1000)]
of: Fix address decoding on Bimini and js2x machines
commit
6dd18e4684f3d188277bbbc27545248487472108 upstream.
Commit:
e38c0a1fbc5803cbacdaac0557c70ac8ca5152e7
of/address: Handle #address-cells > 2 specially
broke real time clock access on Bimini, js2x, and similar powerpc
machines using the "maple" platform. That code was indirectly relying
on the old (broken) behaviour of the translation for the hypertransport
to ISA bridge.
This fixes it by treating hypertransport as a PCI bus
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Takashi Iwai [Mon, 3 Feb 2014 08:56:13 +0000 (09:56 +0100)]
ALSA: hda/realtek - Avoid invalid COEFs for ALC271X
commit
d3c56568f43807135f2c2a09582a69f809f0d8b7 upstream.
We've seen often problems after suspend/resume on Acer Aspire One
AO725 with ALC271X codec as reported in kernel bugzilla, and it turned
out that some COEFs doesn't work and triggers the codec communication
stall.
Since these magic COEF setups are specific to ALC269VB for some PLL
configurations, the machine works even without these manual
adjustment. So, let's simply avoid applying them for ALC271X.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=52181
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[bwh: Backported to 3.2: return 0]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alan Stern [Thu, 30 Jan 2014 15:43:22 +0000 (10:43 -0500)]
usb-storage: enable multi-LUN scanning when needed
commit
823d12c95c666fa7ab7dad208d735f6bc6afabdc upstream.
People sometimes create their own custom-configured kernels and forget
to enable CONFIG_SCSI_MULTI_LUN. This causes problems when they plug
in a USB storage device (such as a card reader) with more than one
LUN.
Fortunately, we can tell fairly easily when a storage device claims to
have more than one LUN. When that happens, this patch asks the SCSI
layer to probe all the LUNs automatically, regardless of the config
setting.
The patch also updates the Kconfig help text for usb-storage,
explaining that CONFIG_SCSI_MULTI_LUN may be necessary.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Thomas Raschbacher <lordvan@lordvan.com>
CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
CC: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2:
- Adjust context
- slave_alloc() already has a us_data pointer]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alan Stern [Tue, 21 Jan 2014 15:38:45 +0000 (10:38 -0500)]
usb-storage: add unusual-devs entry for BlackBerry 9000
commit
c5637e5119c43452a00e27c274356b072263ecbb upstream.
This patch adds an unusual-devs entry for the BlackBerry 9000. This
fixes Bugzilla #22442.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Moritz Moeller-Herrmann <moritz-kernel@moeller-herrmann.de>
Tested-by: Moritz Moeller-Herrmann <moritz-kernel@moeller-herrmann.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alan Stern [Thu, 30 Jan 2014 15:20:29 +0000 (10:20 -0500)]
usb-storage: restrict bcdDevice range for Super Top in Cypress ATACB
commit
a9c143c82608bee2a36410caa56d82cd86bdc7fa upstream.
The Cypress ATACB unusual-devs entry for the Super Top SATA bridge
causes problems. Although it was originally reported only for
bcdDevice = 0x160, its range was much larger. This resulted in a bug
report for bcdDevice 0x220, so the range was capped at 0x219. Now
Milan reports errors with bcdDevice 0x150.
Therefore this patch restricts the range to just 0x160.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Milan Svoboda <milan.svoboda@centrum.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Bjørn Mork [Tue, 14 Jan 2014 17:56:54 +0000 (18:56 +0100)]
usb: ftdi_sio: add Mindstorms EV3 console adapter
commit
67847baee056892dc35efb9c3fd05ae7f075588c upstream.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Sujith Manoharan [Tue, 4 Feb 2014 03:07:53 +0000 (08:37 +0530)]
ath9k: Do not support PowerSave by default
commit
8298383c2cd5a6d0639f1bb1781fba181bd20154 upstream.
Even though we make sure PowerSave is not enabled by default
by disabling the flag, WIPHY_FLAG_PS_ON_BY_DEFAULT on init,
PS could be enabled by userspace based on various factors
like battery usage etc. Since PS in ath9k is just broken
and has been untested for years, remove support for it, but
allow a user to explicitly enable it using a module parameter.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Oleksij Rempel [Thu, 30 Jan 2014 08:14:53 +0000 (09:14 +0100)]
ath9k_htc: Do not support PowerSave by default
commit
6bca610d97b6139a1d7598b8009da9d339daa50f upstream.
It is a copy/paste of patch provided by Sujith for ath9k.
"Even though we make sure PowerSave is not enabled by default
by disabling the flag, WIPHY_FLAG_PS_ON_BY_DEFAULT on init,
PS could be enabled by userspace based on various factors
like battery usage etc. Since PS in ath9k is just broken
and has been untested for years, remove support for it, but
allow a user to explicitly enable it using a module parameter."
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Michael Holzheu [Thu, 30 Jan 2014 15:14:02 +0000 (16:14 +0100)]
s390/dump: Fix dump memory detection
commit
d7736ff5be31edaa4fe5ab62810c64529a24b149 upstream.
Dumps created by kdump or zfcpdump can contain invalid memory holes when
dumping z/VM systems that have memory pressure.
For example:
# zgetdump -i /proc/vmcore.
Memory map:
0000000000000000 -
0000000000bfffff (12 MB)
0000000000e00000 -
00000000014fffff (7 MB)
000000000bd00000 -
00000000f3bfffff (3711 MB)
The memory detection function find_memory_chunks() issues tprot to
find valid memory chunks. In case of CMM it can happen that pages are
marked as unstable via set_page_unstable() in arch_free_page().
If z/VM has released that pages, tprot returns -EFAULT and indicates
a memory hole.
So fix this and switch off CMM in case of kdump or zfcpdump.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dave Jones [Thu, 30 Jan 2014 03:17:09 +0000 (00:17 -0300)]
mxl111sf: Fix compile when CONFIG_DVB_USB_MXL111SF is unset
commit
13e1b87c986100169b0695aeb26970943665eda9 upstream.
Fix the following build error:
drivers/media/usb/dvb-usb-v2/
mxl111sf-tuner.h:72:9: error: expected ‘;’, ‘,’ or ‘)’ before ‘struct’
struct mxl111sf_tuner_config *cfg)
Signed-off-by: Dave Jones <davej@fedoraproject.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tejun Heo [Mon, 3 Feb 2014 15:42:07 +0000 (10:42 -0500)]
sata_sil: apply MOD15WRITE quirk to TOSHIBA MK2561GSYN
commit
9f9c47f00ce99329b1a82e2ac4f70f0fe3db549c upstream.
It's a bit odd to see a newer device showing mod15write; however, the
reported behavior is highly consistent and other factors which could
contribute seem to have been verified well enough. Also, both
sata_sil itself and the drive are fairly outdated at this point making
the risk of this change fairly low. It is possible, probably likely,
that other drive models in the same family have the same problem;
however, for now, let's just add the specific model which was tested.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: matson <lists-matsonpa@luxsci.me>
References: http://lkml.kernel.org/g/
201401211912.s0LJCk7F015058@rs103.luxsci.com
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Krzysztof Kozlowski [Thu, 30 Jan 2014 13:32:45 +0000 (14:32 +0100)]
power: max17040: Fix NULL pointer dereference when there is no platform_data
commit
ac323d8d807060f7c95a685a9fe861e7b6300993 upstream.
Fix NULL pointer dereference of "chip->pdata" if platform_data was not
supplied to the driver.
The driver during probe stored the pointer to the platform_data:
chip->pdata = client->dev.platform_data;
Later it was dereferenced in max17040_get_online() and
max17040_get_status().
If platform_data was not supplied, the NULL pointer exception would
happen:
[ 6.626094] Unable to handle kernel of a at virtual address
00000000
[ 6.628557] pgd =
c0004000
[ 6.632868] [
00000000] *pgd=
66262564
[ 6.634636] Unable to handle kernel paging request at virtual address
e6262000
[ 6.642014] pgd =
de468000
[ 6.644700] [
e6262000] *pgd=
00000000
[ 6.648265] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 6.653552] Modules linked in:
[ 6.656598] CPU: 0 PID: 31 Comm: kworker/0:1 Not tainted 3.10.14-02717-gc58b4b4 #505
[ 6.664334] Workqueue: events max17040_work
[ 6.668488] task:
dfa11b80 ti:
df9f6000 task.ti:
df9f6000
[ 6.673873] PC is at show_pte+0x80/0xb8
[ 6.677687] LR is at show_pte+0x3c/0xb8
[ 6.681503] pc : [<
c001b7b8>] lr : [<
c001b774>] psr:
600f0113
[ 6.681503] sp :
df9f7d58 ip :
600f0113 fp :
00000009
[ 6.692965] r10:
00000000 r9 :
00000000 r8 :
dfa11b80
[ 6.698171] r7 :
df9f7ea0 r6 :
e6262000 r5 :
00000000 r4 :
00000000
[ 6.704680] r3 :
00000000 r2 :
e6262000 r1 :
600f0193 r0 :
c05b3750
[ 6.711194] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 6.718485] Control:
10c53c7d Table:
5e46806a DAC:
00000015
[ 6.724218] Process kworker/0:1 (pid: 31, stack limit = 0xdf9f6238)
[ 6.730465] Stack: (0xdf9f7d58 to 0xdf9f8000)
[ 6.914325] [<
c001b7b8>] (show_pte+0x80/0xb8) from [<
c047107c>] (__do_kernel_fault.part.9+0x44/0x74)
[ 6.923425] [<
c047107c>] (__do_kernel_fault.part.9+0x44/0x74) from [<
c001bb7c>] (do_page_fault+0x2c4/0x360)
[ 6.933144] [<
c001bb7c>] (do_page_fault+0x2c4/0x360) from [<
c0008400>] (do_DataAbort+0x34/0x9c)
[ 6.941825] [<
c0008400>] (do_DataAbort+0x34/0x9c) from [<
c000e5d8>] (__dabt_svc+0x38/0x60)
[ 6.950058] Exception stack(0xdf9f7ea0 to 0xdf9f7ee8)
[ 6.955099] 7ea0:
df0c1790 00000000 00000002 00000000 df0c1794 df0c1790 df0c1790 00000042
[ 6.963271] 7ec0:
df0c1794 00000001 00000000 00000009 00000000 df9f7ee8 c0306268 c0306270
[ 6.971419] 7ee0:
a00f0113 ffffffff
[ 6.974902] [<
c000e5d8>] (__dabt_svc+0x38/0x60) from [<
c0306270>] (max17040_work+0x8c/0x144)
[ 6.983317] [<
c0306270>] (max17040_work+0x8c/0x144) from [<
c003f364>] (process_one_work+0x138/0x440)
[ 6.992429] [<
c003f364>] (process_one_work+0x138/0x440) from [<
c003fa64>] (worker_thread+0x134/0x3b8)
[ 7.001628] [<
c003fa64>] (worker_thread+0x134/0x3b8) from [<
c00454bc>] (kthread+0xa4/0xb0)
[ 7.009875] [<
c00454bc>] (kthread+0xa4/0xb0) from [<
c000eb28>] (ret_from_fork+0x14/0x2c)
[ 7.017943] Code:
e1a03005 e2422480 e0826104 e59f002c (
e7922104)
[ 7.024017] ---[ end trace
73bc7006b9cc5c79 ]---
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes:
c6f4a42de60b981dd210de01cd3e575835e3158e
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 23 Jan 2014 04:04:33 +0000 (23:04 -0500)]
alpha: fix broken network checksum
commit
0ef38d70d4118b2ce1a538d14357be5ff9dc2bbd upstream.
The patch
3ddc5b46a8e90f3c9251338b60191d0a804b0d92 breaks networking on
alpha (there is a follow-up fix
5cfe8f1ba5eebe6f4b6e5858cdb1a5be4f3272a6,
but networking is still broken even with the second patch).
The patch
3ddc5b46a8e90f3c9251338b60191d0a804b0d92 makes
csum_partial_copy_from_user check the pointer with access_ok. However,
csum_partial_copy_from_user is called also from csum_partial_copy_nocheck
and csum_partial_copy_nocheck is called on kernel pointers and it is
supposed not to check pointer validity.
This bug results in ssh session hangs if the system is loaded and bulk
data are printed to ssh terminal.
This patch fixes csum_partial_copy_nocheck to call set_fs(KERNEL_DS), so
that access_ok in csum_partial_copy_from_user accepts kernel-space
addresses.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Denis V. Lunev [Thu, 30 Jan 2014 11:20:30 +0000 (15:20 +0400)]
ata: enable quirk from jmicron JMB350 for JMB394
commit
efb9e0f4f43780f0ae0c6428d66bd03e805c7539 upstream.
Without the patch the kernel generates the following error.
ata11.15: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
ata11.15: Port Multiplier vendor mismatch '0x197b' != '0x123'
ata11.15: PMP revalidation failed (errno=-19)
ata11.15: failed to recover PMP after 5 tries, giving up
This patch helps to bypass this error and the device becomes
functional.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: <linux-ide@vger.kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
David Rientjes [Thu, 30 Jan 2014 23:46:11 +0000 (15:46 -0800)]
mm, oom: base root bonus on current usage
commit
778c14affaf94a9e4953179d3e13a544ccce7707 upstream.
A 3% of system memory bonus is sometimes too excessive in comparison to
other processes.
With commit
a63d83f427fb ("oom: badness heuristic rewrite"), the OOM
killer tries to avoid killing privileged tasks by subtracting 3% of
overall memory (system or cgroup) from their per-task consumption. But
as a result, all root tasks that consume less than 3% of overall memory
are considered equal, and so it only takes 33+ privileged tasks pushing
the system out of memory for the OOM killer to do something stupid and
kill dhclient or other root-owned processes. For example, on a 32G
machine it can't tell the difference between the 1M agetty and the 10G
fork bomb member.
The changelog describes this 3% boost as the equivalent to the global
overcommit limit being 3% higher for privileged tasks, but this is not
the same as discounting 3% of overall memory from _every privileged task
individually_ during OOM selection.
Replace the 3% of system memory bonus with a 3% of current memory usage
bonus.
By giving root tasks a bonus that is proportional to their actual size,
they remain comparable even when relatively small. In the example
above, the OOM killer will discount the 1M agetty's 256 badness points
down to 179, and the 10G fork bomb's 262144 points down to 183500 points
and make the right choice, instead of discounting both to 0 and killing
agetty because it's first in the task list.
Signed-off-by: David Rientjes <rientjes@google.com>
Reported-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.2: existing code changes 'points' directly rather
than using 'adj' variable]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Harald Freudenberger [Wed, 22 Jan 2014 12:01:33 +0000 (13:01 +0100)]
crypto: s390 - fix des and des3_ede ctr concurrency issue
commit
ee97dc7db4cbda33e4241c2d85b42d1835bc8a35 upstream.
In s390 des and 3des ctr mode there is one preallocated page
used to speed up the en/decryption. This page is not protected
against concurrent usage and thus there is a potential of data
corruption with multiple threads.
The fix introduces locking/unlocking the ctr page and a slower
fallback solution at concurrency situations.
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Harald Freudenberger [Wed, 22 Jan 2014 12:00:04 +0000 (13:00 +0100)]
crypto: s390 - fix des and des3_ede cbc concurrency issue
commit
adc3fcf1552b6e406d172fd9690bbd1395053d13 upstream.
In s390 des and des3_ede cbc mode the iv value is not protected
against concurrency access and modifications from another running
en/decrypt operation which is using the very same tfm struct
instance. This fix copies the iv to the local stack before
the crypto operation and stores the value back when done.
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Harald Freudenberger [Thu, 16 Jan 2014 15:01:11 +0000 (16:01 +0100)]
crypto: s390 - fix concurrency issue in aes-ctr mode
commit
0519e9ad89e5cd6e6b08398f57c6a71d9580564c upstream.
The aes-ctr mode uses one preallocated page without any concurrency
protection. When multiple threads run aes-ctr encryption or decryption
this can lead to data corruption.
The patch introduces locking for the page and a fallback solution with
slower en/decryption performance in concurrency situations.
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jan Glauber [Fri, 26 Oct 2012 13:06:12 +0000 (15:06 +0200)]
s390/crypto: Don't panic after crypto instruction failures
commit
36eb2caa7bace31b7868a57f77cb148e58d1c9f9 upstream.
Remove the BUG_ON's that check for failure or incomplete
results of the s390 hardware crypto instructions.
Rather report the errors as -EIO to the crypto layer.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Andy Grover [Sat, 25 Jan 2014 00:18:54 +0000 (16:18 -0800)]
target/iscsi: Fix network portal creation race
commit
ee291e63293146db64668e8d65eb35c97e8324f4 upstream.
When creating network portals rapidly, such as when restoring a
configuration, LIO's code to reuse existing portals can return a false
negative if the thread hasn't run yet and set np_thread_state to
ISCSI_NP_THREAD_ACTIVE. This causes an error in the network stack
when attempting to bind to the same address/port.
This patch sets NP_THREAD_ACTIVE before the np is placed on g_np_list,
so even if the thread hasn't run yet, iscsit_get_np will return the
existing np.
Also, convert np_lock -> np_mutex + hold across adding new net portal
to g_np_list to prevent a race where two threads may attempt to create
the same network portal, resulting in one of them failing.
(nab: Add missing mutex_unlocks in iscsit_add_np failure paths)
(DanC: Fix incorrect spin_unlock -> spin_unlock_bh)
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dan Carpenter [Wed, 29 Jan 2014 13:16:39 +0000 (16:16 +0300)]
KVM: return an error code in kvm_vm_ioctl_register_coalesced_mmio()
commit
aac5c4226e7136c331ed384c25d5560204da10a0 upstream.
If kvm_io_bus_register_dev() fails then it returns success but it should
return an error code.
I also did a little cleanup like removing an impossible NULL test.
Fixes:
2b3c246a682c ('KVM: Make coalesced mmio use a device per zone')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alex Deucher [Mon, 27 Jan 2014 23:29:35 +0000 (18:29 -0500)]
drm/radeon/DCE4+: clear bios scratch dpms bit (v2)
commit
6802d4bad83f50081b2788698570218aaff8d10e upstream.
The BlankCrtc table in some DCE8 boards has some
logic shortcuts for the vbios when this bit is set.
Clear it for driver use.
v2: fix typo
Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=73420
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Chris Mason [Fri, 10 Jan 2014 01:28:00 +0000 (17:28 -0800)]
Btrfs: setup inode location during btrfs_init_inode_locked
commit
90d3e592e99b8e374ead2b45148abf506493a959 upstream.
We have a race during inode init because the BTRFS_I(inode)->location is setup
after the inode hash table lock is dropped. btrfs_find_actor uses the location
field, so our search might not find an existing inode in the hash table if we
race with the inode init code.
This commit changes things to setup the location field sooner. Also the find actor now
uses only the location objectid to match inodes. For inode hashing, we just
need a unique and stable test, it doesn't have to reflect the inode numbers we
show to userland.
Signed-off-by: Chris Mason <clm@fb.com>
[bwh: Backported to 3.2:
- No hashval in btrfs_iget_locked()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Mackerras [Sat, 18 Jan 2014 10:14:47 +0000 (21:14 +1100)]
powerpc: Make sure "cache" directory is removed when offlining cpu
commit
91b973f90c1220d71923e7efe1e61f5329806380 upstream.
The code in remove_cache_dir() is supposed to remove the "cache"
subdirectory from the sysfs directory for a CPU when that CPU is
being offlined. It tries to do this by calling kobject_put() on
the kobject for the subdirectory. However, the subdirectory only
gets removed once the last reference goes away, and the reference
being put here may well not be the last reference. That means
that the "cache" subdirectory may still exist when the offlining
operation has finished. If the same CPU subsequently gets onlined,
the code tries to add a new "cache" subdirectory. If the old
subdirectory has not yet been removed, we get a WARN_ON in the
sysfs code, with stack trace, and an error message printed on the
console. Further, we ultimately end up with an online cpu with no
"cache" subdirectory.
This fixes it by doing an explicit kobject_del() at the point where
we want the subdirectory to go away. kobject_del() removes the sysfs
directory even though the object still exists in memory. The object
will get freed at some point in the future. A subsequent onlining
operation can create a new sysfs directory, even if the old object
still exists in memory, without causing any problems.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mark Brown [Mon, 27 Jan 2014 00:32:14 +0000 (00:32 +0000)]
ACPI / init: Flag use of ACPI and ACPI idioms for power supplies to regulator API
commit
49a12877d2777cadcb838981c3c4f5a424aef310 upstream.
There is currently no facility in ACPI to express the hookup of voltage
regulators, the expectation is that the regulators that exist in the
system will be handled transparently by firmware if they need software
control at all. This means that if for some reason the regulator API is
enabled on such a system it should assume that any supplies that devices
need are provided by the system at all relevant times without any software
intervention.
Tell the regulator core to make this assumption by calling
regulator_has_full_constraints(). Do this as soon as we know we are using
ACPI so that the information is available to the regulator core as early
as possible. This will cause the regulator core to pretend that there is
an always on regulator supplying any supply that is requested but that has
not otherwise been mapped which is the behaviour expected on a system with
ACPI.
Should the ability to specify regulators be added in future revisions of
ACPI then once we have support for ACPI mappings in the kernel the same
assumptions will apply. It is also likely that systems will default to a
mode of operation which does not require any interpretation of these
mappings in order to be compatible with existing operating system releases
so it should remain safe to make these assumptions even if the mappings
exist but are not supported by the kernel.
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
David Sterba [Wed, 15 Jan 2014 17:15:52 +0000 (18:15 +0100)]
btrfs: restrict snapshotting to own subvolumes
commit
d024206133ce21936b3d5780359afc00247655b7 upstream.
Currently, any user can snapshot any subvolume if the path is accessible and
thus indirectly create and keep files he does not own under his direcotries.
This is not possible with traditional directories.
In security context, a user can snapshot root filesystem and pin any
potentially buggy binaries, even if the updates are applied.
All the snapshots are visible to the administrator, so it's possible to
verify if there are suspicious snapshots.
Another more practical problem is that any user can pin the space used
by eg. root and cause ENOSPC.
Original report:
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/484786
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
[bwh: Backported to 3.2:
- Adjust context
- Use the same cleanup code for success and error cases, as done
upstream in commit
ecd188159efa
('switch btrfs_ioctl_snap_create_transid() to fget_light()')]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Wang Shilong [Tue, 7 Jan 2014 09:26:58 +0000 (17:26 +0800)]
Btrfs: handle EAGAIN case properly in btrfs_drop_snapshot()
commit
90515e7f5d7d24cbb2a4038a3f1b5cfa2921aa17 upstream.
We may return early in btrfs_drop_snapshot(), we shouldn't
call btrfs_std_err() for this case, fix it.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mihai Caraman [Thu, 9 Jan 2014 15:01:05 +0000 (17:01 +0200)]
KVM: PPC: e500: Fix bad address type in deliver_tlb_misss()
commit
70713fe315ed14cd1bb07d1a7f33e973d136ae3d upstream.
Use gva_t instead of unsigned int for eaddr in deliver_tlb_miss().
Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Shane Huang [Wed, 22 Jan 2014 22:05:46 +0000 (14:05 -0800)]
i2c: piix4: Add support for AMD ML and CZ SMBus changes
commit
032f708bc4f6da868ec49dac48ddf3670d8035d3 upstream.
The locations of SMBus register base address and enablement bit are changed
from AMD ML, which need this patch to be supported.
Signed-off-by: Shane Huang <shane.huang@amd.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
[bwh: Backported to 3.2:
- Adjust context
- Aux bus support is not included]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ZHAO Gang [Fri, 17 Jan 2014 16:17:38 +0000 (00:17 +0800)]
b43: fix the wrong assignment of status.freq in b43_rx()
commit
64e5acb09ca6b50c97299cff9ef51299470b29f2 upstream.
Use the right function to update frequency value.
If rx skb is probe response or beacon, the wrong frequency value can
cause problem that bss info can't be updated when it should be.
Fixes:
8318d78a44d4 ("cfg80211 API for channels/bitrates, mac80211
and driver conversion")
Signed-off-by: ZHAO Gang <gamerh2o@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Boaz Harrosh [Thu, 21 Nov 2013 15:58:08 +0000 (17:58 +0200)]
ore: Fix wrong math in allocation of per device BIO
commit
aad560b7f63b495f48a7232fd086c5913a676e6f upstream.
At IO preparation we calculate the max pages at each device and
allocate a BIO per device of that size. The calculation was wrong
on some unaligned corner cases offset/length combination and would
make prepare return with -ENOMEM. This would be bad for pnfs-objects
that would in that case IO through MDS. And fatal for exofs were it
would fail writes with EIO.
Fix it by doing the proper math, that will work in all cases. (I
ran a test with all possible offset/length combinations this time
round).
Also when reading we do not need to allocate for the parity units
since we jump over them.
Also lower the max_io_length to take into account the parity pages
so not to allocate BIOs bigger than PAGE_SIZE
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ira Weiny [Wed, 18 Dec 2013 16:41:37 +0000 (08:41 -0800)]
IB/qib: Fix QP check when looping back to/from QP1
commit
6e0ea9e6cbcead7fa8c76e3e3b9de4a50c5131c5 upstream.
The GSI QP type is compatible with and should be allowed to send data
to/from any UD QP. This was found when testing ibacm on the same node
as an SA.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Miklos Szeredi [Wed, 22 Jan 2014 18:36:57 +0000 (19:36 +0100)]
fuse: fix pipe_buf_operations
commit
28a625cbc2a14f17b83e47ef907b2658576a32aa upstream.
Having this struct in module memory could Oops when if the module is
unloaded while the buffer still persists in a pipe.
Since sock_pipe_buf_ops is essentially the same as fuse_dev_pipe_buf_steal
merge them into nosteal_pipe_buf_ops (this is the same as
default_pipe_buf_ops except stealing the page from the buffer is not
allowed).
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alex Williamson [Tue, 21 Jan 2014 23:48:18 +0000 (15:48 -0800)]
intel-iommu: fix off-by-one in pagetable freeing
commit
08336fd218e087cc4fcc458e6b6dcafe8702b098 upstream.
dma_pte_free_level() has an off-by-one error when checking whether a pte
is completely covered by a range. Take for example the case of
attempting to free pfn 0x0 - 0x1ff, ie. 512 entries covering the first
2M superpage.
The level_size() is 0x200 and we test:
static void dma_pte_free_level(...
...
if (!(0 > 0 || 0x1ff < 0 + 0x200)) {
...
}
Clearly the 2nd test is true, which means we fail to take the branch to
clear and free the pagetable entry. As a result, we're leaking
pagetables and failing to install new pages over the range.
This was found with a PCI device assigned to a QEMU guest using vfio-pci
without a VGA device present. The first 1M of guest address space is
mapped with various combinations of 4K pages, but eventually the range
is entirely freed and replaced with a 2M contiguous mapping.
intel-iommu errors out with something like:
ERROR: DMA PTE for vPFN 0x0 already set (to
5c2b8003 not
849c00083)
In this case
5c2b8003 is the pointer to the previous leaf page that was
neither freed nor cleared and
849c00083 is the superpage entry that
we're trying to replace it with.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Takashi Iwai [Mon, 13 Jan 2014 11:32:44 +0000 (12:32 +0100)]
hp_accel: Add a new PnP ID HPQ6007 for new HP laptops
commit
b0ad4ff35d479a46a3b995a299db9aeb097acfce upstream.
The DriveGuard chips on the new HP laptops are with a new PnP ID
"HPQ6007". It should be compatible with older chips.
Acked-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alex Deucher [Thu, 16 Jan 2014 23:11:47 +0000 (18:11 -0500)]
drm/radeon: set the full cache bit for fences on r7xx+
commit
d45b964a22cad962d3ede1eba8d24f5cee7b2a92 upstream.
Needed to properly flush the read caches for fences.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[bwh: Backported to 3.2:
- Adjust context
- s/\bring\b/rdev/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alex Deucher [Mon, 13 Jan 2014 21:47:05 +0000 (16:47 -0500)]
drm/radeon: disable ss on DP for DCE3.x
commit
d8e24525094200601236fa64a54cf73e3d682f2e upstream.
Seems to cause problems with certain DP monitors.
Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=40699
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[bwh: Backported to 3.2: s/radeon_crtc->//]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Josh Triplett [Wed, 21 Aug 2013 00:20:14 +0000 (17:20 -0700)]
turbostat: Use GCC's CPUID functions to support PIC
commit
2b92865e648ce04a39fda4f903784a5d01ecb0dc upstream.
turbostat uses inline assembly to call cpuid. On 32-bit x86, on systems
that have certain security features enabled by default that make -fPIC
the default, this causes a build error:
turbostat.c: In function ‘check_cpuid’:
turbostat.c:1906:2: error: PIC register clobbered by ‘ebx’ in ‘asm’
asm("cpuid" : "=a" (fms), "=c" (ecx), "=d" (edx) : "a" (1) : "ebx");
^
GCC provides a header cpuid.h, containing a __get_cpuid function that
works with both PIC and non-PIC. (On PIC, it saves and restores ebx
around the cpuid instruction.) Use that instead.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Aisheng Dong [Mon, 23 Dec 2013 11:13:04 +0000 (19:13 +0800)]
mmc: sdhci: fix lockdep error in tuning routine
commit
2b35bd83467df6f8284b9148d6f768148c3a5e5f upstream.
The sdhci_execute_tuning routine gets lock separately by
disable_irq(host->irq);
spin_lock(&host->lock);
It will cause the following lockdep error message since the &host->lock
could also be got in irq context.
Use spin_lock_irqsave/spin_unlock_restore instead to get rid of
this error message.
[ INFO: inconsistent lock state ]
3.13.0-rc1+ #287 Not tainted
---------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
kworker/u2:1/33 [HC0[0]:SC0[0]:HE1:SE1] takes:
(&(&host->lock)->rlock){?.-...}, at: [<
8045f7f4>] sdhci_execute_tuning+0x4c/0x710
{IN-HARDIRQ-W} state was registered at:
[<
8005f030>] mark_lock+0x140/0x6ac
[<
80060760>] __lock_acquire+0xb30/0x1cbc
[<
800620d0>] lock_acquire+0x70/0x84
[<
8061d1c8>] _raw_spin_lock+0x30/0x40
[<
804605cc>] sdhci_irq+0x24/0xa68
[<
8006b1d4>] handle_irq_event_percpu+0x54/0x18c
[<
8006b350>] handle_irq_event+0x44/0x64
[<
8006e50c>] handle_fasteoi_irq+0xa0/0x170
[<
8006a8f0>] generic_handle_irq+0x30/0x44
[<
8000f238>] handle_IRQ+0x54/0xbc
[<
8000864c>] gic_handle_irq+0x30/0x64
[<
80013024>] __irq_svc+0x44/0x5c
[<
80329bf4>] dev_vprintk_emit+0x50/0x58
[<
80329c24>] dev_printk_emit+0x28/0x30
[<
80329fec>] __dev_printk+0x4c/0x90
[<
8032a180>] dev_err+0x3c/0x48
[<
802dd4f0>] _regulator_get+0x158/0x1cc
[<
802dd5b4>] regulator_get_optional+0x18/0x1c
[<
80461df4>] sdhci_add_host+0x42c/0xbd8
[<
80464820>] sdhci_esdhc_imx_probe+0x378/0x67c
[<
8032ee88>] platform_drv_probe+0x20/0x50
[<
8032d48c>] driver_probe_device+0x118/0x234
[<
8032d690>] __driver_attach+0x9c/0xa0
[<
8032b89c>] bus_for_each_dev+0x68/0x9c
[<
8032cf44>] driver_attach+0x20/0x28
[<
8032cbc8>] bus_add_driver+0x148/0x1f4
[<
8032dce0>] driver_register+0x80/0x100
[<
8032ee54>] __platform_driver_register+0x50/0x64
[<
8084b094>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<
80008980>] do_one_initcall+0x108/0x16c
[<
8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<
80611b28>] kernel_init+0x10/0x120
[<
8000e9c8>] ret_from_fork+0x14/0x2c
irq event stamp: 805
hardirqs last enabled at (805): [<
8061d43c>] _raw_spin_unlock_irqrestore+0x38/0x4c
hardirqs last disabled at (804): [<
8061d2c8>] _raw_spin_lock_irqsave+0x24/0x54
softirqs last enabled at (570): [<
8002b824>] __do_softirq+0x1c4/0x290
softirqs last disabled at (561): [<
8002bcf4>] irq_exit+0xb4/0x10c
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(&host->lock)->rlock);
<Interrupt>
lock(&(&host->lock)->rlock);
*** DEADLOCK ***
2 locks held by kworker/u2:1/33:
#0: (kmmcd){.+.+..}, at: [<
8003db18>] process_one_work+0x128/0x468
#1: ((&(&host->detect)->work)){+.+...}, at: [<
8003db18>] process_one_work+0x128/0x468
stack backtrace:
CPU: 0 PID: 33 Comm: kworker/u2:1 Not tainted 3.13.0-rc1+ #287
Workqueue: kmmcd mmc_rescan
Backtrace:
[<
80012160>] (dump_backtrace+0x0/0x10c) from [<
80012438>] (show_stack+0x18/0x1c)
r6:
bfad0900 r5:
00000000 r4:
8088ecc8 r3:
bfad0900
[<
80012420>] (show_stack+0x0/0x1c) from [<
806169ec>] (dump_stack+0x84/0x9c)
[<
80616968>] (dump_stack+0x0/0x9c) from [<
806147b4>] (print_usage_bug+0x260/0x2d0)
r5:
8076ba88 r4:
80977410
[<
80614554>] (print_usage_bug+0x0/0x2d0) from [<
8005f0d0>] (mark_lock+0x1e0/0x6ac)
r9:
8005e678 r8:
00000000 r7:
bfad0900 r6:
00001015 r5:
bfad0cd0
r4:
00000002
[<
8005eef0>] (mark_lock+0x0/0x6ac) from [<
80060234>] (__lock_acquire+0x604/0x1cbc)
[<
8005fc30>] (__lock_acquire+0x0/0x1cbc) from [<
800620d0>] (lock_acquire+0x70/0x84)
[<
80062060>] (lock_acquire+0x0/0x84) from [<
8061d1c8>] (_raw_spin_lock+0x30/0x40)
r7:
00000000 r6:
bfb63000 r5:
00000000 r4:
bfb60568
[<
8061d198>] (_raw_spin_lock+0x0/0x40) from [<
8045f7f4>] (sdhci_execute_tuning+0x4c/0x710)
r4:
bfb60000
[<
8045f7a8>] (sdhci_execute_tuning+0x0/0x710) from [<
80453454>] (mmc_sd_init_card+0x5f8/0x660)
[<
80452e5c>] (mmc_sd_init_card+0x0/0x660) from [<
80453748>] (mmc_attach_sd+0xb4/0x180)
r9:
bf92d400 r8:
8065f364 r7:
00061a80 r6:
bfb60000 r5:
8065f358
r4:
bfb60000
[<
80453694>] (mmc_attach_sd+0x0/0x180) from [<
8044d9f8>] (mmc_rescan+0x284/0x2f0)
r5:
8065f358 r4:
bfb602f8
[<
8044d774>] (mmc_rescan+0x0/0x2f0) from [<
8003db94>] (process_one_work+0x1a4/0x468)
r8:
00000000 r7:
bfb55eb0 r6:
bf80dc00 r5:
bfb602f8 r4:
bfb35980
r3:
8044d774
[<
8003d9f0>] (process_one_work+0x0/0x468) from [<
8003e850>] (worker_thread+0x118/0x3e0)
[<
8003e738>] (worker_thread+0x0/0x3e0) from [<
80044de0>] (kthread+0xd4/0xf0)
[<
80044d0c>] (kthread+0x0/0xf0) from [<
8000e9c8>] (ret_from_fork+0x14/0x2c)
r7:
00000000 r6:
00000000 r5:
80044d0c r4:
bfb37b40
Signed-off-by: Dong Aisheng <b29396@freescale.com>
Signed-off-by: Chris Ball <chris@printf.net>
[bwh: Backported to 3.2:
- Adjust context
- There's no platform_execute_tuning hook]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tejun Heo [Thu, 16 Jan 2014 14:47:17 +0000 (09:47 -0500)]
libata: disable LPM for some WD SATA-I devices
commit
ecd75ad514d73efc1bbcc5f10a13566c3ace5f53 upstream.
For some reason, some early WD drives spin up and down drives
erratically when the link is put into slumber mode which can reduce
the life expectancy of the device significantly. Unfortunately, we
don't have full list of devices and given the nature of the issue it'd
be better to err on the side of false positives than the other way
around. Let's disable LPM on all WD devices which match one of the
known problematic model prefixes and are SATA-I.
As horkage list doesn't support matching SATA capabilities, this is
implemented as two horkages - WD_BROKEN_LPM and NOLPM. The former is
set for the known prefixes and sets the latter if the matched device
is SATA-I.
Note that this isn't optimal as this disables all LPM operations and
partial link power state reportedly works fine on these; however, the
way LPM is implemented in libata makes it difficult to precisely map
libata LPM setting to specific link power state. Well, these devices
are already fairly outdated. Let's just disable whole LPM for now.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-tested-by: Nikos Barkas <levelwol@gmail.com>
Reported-and-tested-by: Ioannis Barkas <risc4all@yahoo.com>
References: https://bugzilla.kernel.org/show_bug.cgi?id=57211
[bwh: Backported to 3.2:
- Adjust context
- Use literal 76 instead of ATA_ID_SATA_CAPABILITY]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Prarit Bhargava [Mon, 13 Jan 2014 11:51:01 +0000 (06:51 -0500)]
x86: Add check for number of available vectors before CPU down
commit
da6139e49c7cb0f4251265cb5243b8d220adb48d upstream.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64791
When a cpu is downed on a system, the irqs on the cpu are assigned to
other cpus. It is possible, however, that when a cpu is downed there
aren't enough free vectors on the remaining cpus to account for the
vectors from the cpu that is being downed.
This results in an interesting "overflow" condition where irqs are
"assigned" to a CPU but are not handled.
For example, when downing cpus on a 1-64 logical processor system:
<snip>
[ 232.021745] smpboot: CPU 61 is now offline
[ 238.480275] smpboot: CPU 62 is now offline
[ 245.991080] ------------[ cut here ]------------
[ 245.996270] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:264 dev_watchdog+0x246/0x250()
[ 246.005688] NETDEV WATCHDOG: p786p1 (ixgbe): transmit queue 0 timed out
[ 246.013070] Modules linked in: lockd sunrpc iTCO_wdt iTCO_vendor_support sb_edac ixgbe microcode e1000e pcspkr joydev edac_core lpc_ich ioatdma ptp mdio mfd_core i2c_i801 dca pps_core i2c_core wmi acpi_cpufreq isci libsas scsi_transport_sas
[ 246.037633] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.12.0+ #14
[ 246.044451] Hardware name: Intel Corporation S4600LH ........../SVRBD-ROW_T, BIOS SE5C600.86B.01.08.0003.
022620131521 02/26/2013
[ 246.057371]
0000000000000009 ffff88081fa03d40 ffffffff8164fbf6 ffff88081fa0ee48
[ 246.065728]
ffff88081fa03d90 ffff88081fa03d80 ffffffff81054ecc ffff88081fa13040
[ 246.074073]
0000000000000000 ffff88200cce0000 0000000000000040 0000000000000000
[ 246.082430] Call Trace:
[ 246.085174] <IRQ> [<
ffffffff8164fbf6>] dump_stack+0x46/0x58
[ 246.091633] [<
ffffffff81054ecc>] warn_slowpath_common+0x8c/0xc0
[ 246.098352] [<
ffffffff81054fb6>] warn_slowpath_fmt+0x46/0x50
[ 246.104786] [<
ffffffff815710d6>] dev_watchdog+0x246/0x250
[ 246.110923] [<
ffffffff81570e90>] ? dev_deactivate_queue.constprop.31+0x80/0x80
[ 246.119097] [<
ffffffff8106092a>] call_timer_fn+0x3a/0x110
[ 246.125224] [<
ffffffff8106280f>] ? update_process_times+0x6f/0x80
[ 246.132137] [<
ffffffff81570e90>] ? dev_deactivate_queue.constprop.31+0x80/0x80
[ 246.140308] [<
ffffffff81061db0>] run_timer_softirq+0x1f0/0x2a0
[ 246.146933] [<
ffffffff81059a80>] __do_softirq+0xe0/0x220
[ 246.152976] [<
ffffffff8165fedc>] call_softirq+0x1c/0x30
[ 246.158920] [<
ffffffff810045f5>] do_softirq+0x55/0x90
[ 246.164670] [<
ffffffff81059d35>] irq_exit+0xa5/0xb0
[ 246.170227] [<
ffffffff8166062a>] smp_apic_timer_interrupt+0x4a/0x60
[ 246.177324] [<
ffffffff8165f40a>] apic_timer_interrupt+0x6a/0x70
[ 246.184041] <EOI> [<
ffffffff81505a1b>] ? cpuidle_enter_state+0x5b/0xe0
[ 246.191559] [<
ffffffff81505a17>] ? cpuidle_enter_state+0x57/0xe0
[ 246.198374] [<
ffffffff81505b5d>] cpuidle_idle_call+0xbd/0x200
[ 246.204900] [<
ffffffff8100b7ae>] arch_cpu_idle+0xe/0x30
[ 246.210846] [<
ffffffff810a47b0>] cpu_startup_entry+0xd0/0x250
[ 246.217371] [<
ffffffff81646b47>] rest_init+0x77/0x80
[ 246.223028] [<
ffffffff81d09e8e>] start_kernel+0x3ee/0x3fb
[ 246.229165] [<
ffffffff81d0989f>] ? repair_env_string+0x5e/0x5e
[ 246.235787] [<
ffffffff81d095a5>] x86_64_start_reservations+0x2a/0x2c
[ 246.242990] [<
ffffffff81d0969f>] x86_64_start_kernel+0xf8/0xfc
[ 246.249610] ---[ end trace
fb74fdef54d79039 ]---
[ 246.254807] ixgbe 0000:c2:00.0 p786p1: initiating reset due to tx timeout
[ 246.262489] ixgbe 0000:c2:00.0 p786p1: Reset adapter
Last login: Mon Nov 11 08:35:14 from 10.18.17.119
[root@(none) ~]# [ 246.792676] ixgbe 0000:c2:00.0 p786p1: detected SFP+: 5
[ 249.231598] ixgbe 0000:c2:00.0 p786p1: NIC Link is Up 10 Gbps, Flow Control: RX/TX
[ 246.792676] ixgbe 0000:c2:00.0 p786p1: detected SFP+: 5
[ 249.231598] ixgbe 0000:c2:00.0 p786p1: NIC Link is Up 10 Gbps, Flow Control: RX/TX
(last lines keep repeating. ixgbe driver is dead until module reload.)
If the downed cpu has more vectors than are free on the remaining cpus on the
system, it is possible that some vectors are "orphaned" even though they are
assigned to a cpu. In this case, since the ixgbe driver had a watchdog, the
watchdog fired and notified that something was wrong.
This patch adds a function, check_vectors(), to compare the number of vectors
on the CPU going down and compares it to the number of vectors available on
the system. If there aren't enough vectors for the CPU to go down, an
error is returned and propogated back to userspace.
v2: Do not need to look at percpu irqs
v3: Need to check affinity to prevent counting of MSIs in IOAPIC Lowest
Priority Mode
v4: Additional changes suggested by Gong Chen.
v5/v6/v7/v8: Updated comment text
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Link: http://lkml.kernel.org/r/1389613861-3853-1-git-send-email-prarit@redhat.com
Reviewed-by: Gong Chen <gong.chen@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: Yang Zhang <yang.z.zhang@Intel.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Janet Morgan <janet.morgan@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Ruiv Wang <ruiv.wang@gmail.com>
Cc: Gong Chen <gong.chen@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
NeilBrown [Wed, 15 Jan 2014 22:35:38 +0000 (09:35 +1100)]
md/raid5: fix long-standing problem with bitmap handling on write failure.
commit
9f97e4b128d2ea90a5f5063ea0ee3b0911f4c669 upstream.
Before a write starts we set a bit in the write-intent bitmap.
When the write completes we clear that bit if the write was successful
to all devices. However if the write wasn't fully successful we
should not clear the bit. If the faulty drive is subsequently
re-added, the fact that the bit is still set ensure that we will
re-write the data that is missing.
This logic is mediated by the STRIPE_DEGRADED flag - we only clear the
bitmap bit when this flag is not set.
Currently we correctly set the flag if a write starts when some
devices are failed or missing. But we do *not* set the flag if some
device failed during the write attempt.
This is wrong and can result in clearing the bit inappropriately.
So: set the flag when a write fails.
This bug has been present since bitmaps were introduces, so the fix is
suitable for any -stable kernel.
Reported-by: Ethan Wilson <ethan.wilson@shiftmail.org>
Signed-off-by: NeilBrown <neilb@suse.de>
[bwh: Backported to 3.2: adjust context, indentation]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Marcelo Tosatti [Mon, 6 Jan 2014 14:00:02 +0000 (12:00 -0200)]
KVM: x86: limit PIT timer frequency
commit
9ed96e87c5748de4c2807ef17e81287c7304186c upstream.
Limit PIT timer frequency similarly to the limit applied by
LAPIC timer.
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[bwh: Backported to 3.2:
- Adjust context
- s/ps->period/pt->period/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>