pandora-kernel.git
12 years agoMerge branch 'fixes' of git://gitorious.org/linux-davinci/linux-davinci into fixes
Arnd Bergmann [Tue, 6 Dec 2011 14:20:13 +0000 (14:20 +0000)]
Merge branch 'fixes' of git://gitorious.org/linux-davinci/linux-davinci into fixes

12 years agoMerge branch 'mxs/fixes' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes
Arnd Bergmann [Tue, 6 Dec 2011 14:18:36 +0000 (14:18 +0000)]
Merge branch 'mxs/fixes' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes

12 years agoMerge branch 'fixes' of git://gitorious.org/sirfprima2-kernel/sirfprima2-kernel into...
Arnd Bergmann [Tue, 6 Dec 2011 14:17:22 +0000 (14:17 +0000)]
Merge branch 'fixes' of git://gitorious.org/sirfprima2-kernel/sirfprima2-kernel into fixes

12 years agoiommu/amd: Fix typo in kernel-parameters.txt
Sedat Dilek [Mon, 5 Dec 2011 22:08:32 +0000 (23:08 +0100)]
iommu/amd: Fix typo in kernel-parameters.txt

Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
12 years agoMerge branch 'imx/fix-irqdomain' of git://git.linaro.org/people/shawnguo/linux-2...
Arnd Bergmann [Tue, 6 Dec 2011 14:15:02 +0000 (14:15 +0000)]
Merge branch 'imx/fix-irqdomain' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes

12 years agoMerge branch 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes
Arnd Bergmann [Tue, 6 Dec 2011 14:14:06 +0000 (14:14 +0000)]
Merge branch 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes

12 years agox86/intel_mid: Kconfig select fix
Alan Cox [Tue, 6 Dec 2011 13:28:22 +0000 (13:28 +0000)]
x86/intel_mid: Kconfig select fix

If we select a symbol it should have a type declared first
otherwise in some situations the config tools get upset. They
are currently perhaps a bit too resilient which is why this
wasn't noticed initially.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/20111206132811.4041.32549.stgit@bob.linux.org.uk
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoMerge branch 'fix/asoc' into for-linus
Takashi Iwai [Tue, 6 Dec 2011 12:22:28 +0000 (13:22 +0100)]
Merge branch 'fix/asoc' into for-linus

12 years agoALSA: hda - Fix remaining VREF mute-LED NID check in post-3.1 changes
Takashi Iwai [Tue, 6 Dec 2011 12:17:23 +0000 (13:17 +0100)]
ALSA: hda - Fix remaining VREF mute-LED NID check in post-3.1 changes

Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoMerge branch 'fix/hda-idt-fix' into fix/hda
Takashi Iwai [Tue, 6 Dec 2011 12:19:25 +0000 (13:19 +0100)]
Merge branch 'fix/hda-idt-fix' into fix/hda

12 years agoALSA: hda - Fix GPIO LED setup for IDT 92HD75 codecs
Takashi Iwai [Sun, 4 Dec 2011 12:44:06 +0000 (13:44 +0100)]
ALSA: hda - Fix GPIO LED setup for IDT 92HD75 codecs

Some HP laptops with IDT 92HD75 codecs may use a GPIO > 4 for the mute
LED, but currently the driver doesn't check this properly, and confuses
the mute LED behavior.  This ended up with the silent output  on some
HP laptops due to  having another GPIO used as external amp control.

This patch fixes the problem by checking the max GPIO count and
comparing with the given value from DMI entry instead of magic fixed
value 4 and 8, and adding a new field to indicate the VREF mute-LED
behavior.

Reported-and-tested-by: Vitaliy Kulikov <Vitaliy.Kulikov@idt.com>
Cc: <stable@kernel.org> [v3.1]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoperf header: Use event_name() to get an event name
Andrew Vagin [Mon, 28 Nov 2011 09:03:29 +0000 (12:03 +0300)]
perf header: Use event_name() to get an event name

perf_evsel.name may be not initialized

Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arun Sharma <asharma@fb.com>
Cc: devel@openvz.org
Link: http://lkml.kernel.org/r/1322471015-107825-2-git-send-email-avagin@openvz.org
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
12 years agoalarmtimers: Fix time comparison
Thomas Gleixner [Mon, 5 Dec 2011 20:20:23 +0000 (21:20 +0100)]
alarmtimers: Fix time comparison

The expiry function compares the timer against current time and does
not expire the timer when the expiry time is >= now. That's wrong. If
the timer is set for now, then it must expire.

Make the condition expiry > now for breaking out the loop.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Cc: stable@kernel.org
12 years agoptp: Fix clock_getres() implementation
Thomas Gleixner [Mon, 5 Dec 2011 20:16:06 +0000 (21:16 +0100)]
ptp: Fix clock_getres() implementation

The clock_getres() function must return the resolution in the timespec
argument and return 0 for success.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Cc: stable@kernel.org
Cc: Richard Cochran <richard.cochran@omicron.at>
12 years agox86/intel_mid: Fix the Kconfig for MID selection
Alan Cox [Mon, 5 Dec 2011 23:14:39 +0000 (23:14 +0000)]
x86/intel_mid: Fix the Kconfig for MID selection

We currently fail to build on CONFIG_X86_INTEL_MID=y and
CONFIG_X86_MRST unset.

We could build all the bits to make generic MID work if you
picked MID platform alone but that's really silly. Instead use
select and two variables.

This looks a bit daft right now but once we add a Medfield
selection it'll start to look a good deal more sensible.

Reported-by: Ingo Molnar <mingo@elte.hu>
Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/20111205231433.28811.51297.stgit@bob.linux.org.uk
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoiommu/msm: Fix compile error in mach-msm/devices-iommu.c
Joerg Roedel [Tue, 6 Dec 2011 10:17:34 +0000 (11:17 +0100)]
iommu/msm: Fix compile error in mach-msm/devices-iommu.c

Fix compile error due to missing <linux/module.h> include.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
12 years agoASoC: Provide a more complete DMA driver stub
Mark Brown [Mon, 5 Dec 2011 20:50:45 +0000 (20:50 +0000)]
ASoC: Provide a more complete DMA driver stub

Allow userspace applications to do more parameter setting by providing a
more complete stub DMA driver specifying a wildcard set of formats and
channels and essentially random values for the DMA parameters. This is
required for useful runtime operation of the dummy DMA driver until we
are able to figure out how to power up links and do hw_params() from DAPM.

Sending to stable as without this the dummy driver is not terribly
useful.

Reported-by: Kyung-Kwee Ryu <Kyung-Kwee.Ryu@wolfsonmicro.com>
Tested-by: Kyung-Kwee Ryu <Kyung-Kwee.Ryu@wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
12 years agoiscsi-target: Fix hex2bin warn_unused compile message
Nicholas Bellinger [Tue, 6 Dec 2011 05:24:19 +0000 (05:24 +0000)]
iscsi-target: Fix hex2bin warn_unused compile message

Fix the following compile warning with hex2bin() usage:

drivers/target/iscsi/iscsi_target_auth.c: In function ‘chap_string_to_hex’:
drivers/target/iscsi/iscsi_target_auth.c:35: warning: ignoring return value of ‘hex2bin’, declared with attribute warn_unused_result

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Don't return an error if disabling unsupported features
Andy Grover [Wed, 30 Nov 2011 20:11:50 +0000 (12:11 -0800)]
target: Don't return an error if disabling unsupported features

If an attribute is present (but not yet supported) it should be OK
to write 0 (a no-op) to the attribute.

This is an issue because userspace should be able to save and restore all
set attribute values without error.

Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget/rd: fix or rewrite the copy routine
Sebastian Andrzej Siewior [Wed, 30 Nov 2011 09:48:30 +0000 (10:48 +0100)]
target/rd: fix or rewrite the copy routine

So the code assumes that the sg list is only a array while in reality
loopback SGL memory via scsi_cmnd into target-core may be already
chained.  This patch converts ramdisk code to use sg_miter logic from
scatterlist.h in order to properly support passthrough SGL usage with
transport_generic_map_mem_to_cmd() via loopback.

With this patch the bug goes away. However after umount/mount of the
device my files are gone. So something is still not right. After looking
at it for a while I decided to rewrite the that part of the code and now
things do work for me.

For reference:
- http://article.gmane.org/gmane.linux.scsi.target.devel/595
  the sg_next() conversion
- http://article.gmane.org/gmane.linux.scsi.target.devel/602
  the rewrite of the copy code

(nab: Fix compile warning in rd_MEMCPY)

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget/rd: simplify the page/offset computation
Sebastian Andrzej Siewior [Fri, 25 Nov 2011 21:18:45 +0000 (22:18 +0100)]
target/rd: simplify the page/offset computation

Breakout rd_MEMCPY_do_task() usage of do_div() to tmp value during
rd_request->rd_page assignment.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the unused se_dev_list
Christoph Hellwig [Tue, 29 Nov 2011 08:29:59 +0000 (03:29 -0500)]
target: remove the unused se_dev_list

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget/file: walk properly over sg list
Sebastian Andrzej Siewior [Mon, 28 Nov 2011 11:33:10 +0000 (12:33 +0100)]
target/file: walk properly over sg list

This patch changes fileio to use for_each_sg() when walking se_task->task_sg
memory passed into from loopback LLD struct scsi_cmnd scatterlist memory.

This addresses an issue where FILEIO backends with loopback where hitting the
following OOPs with mkfs.ext2:

|kernel BUG at include/linux/scatterlist.h:97!
|invalid opcode: 0000 [#1] PREEMPT SMP
|Modules linked in: sd_mod tcm_loop target_core_stgt scsi_tgt target_core_pscsi target_core_file target_core_iblock target_core_mod configfs scsi_mod
|
|Pid: 671, comm: LIO_fileio Not tainted 3.1.0-rc10+ #139 Bochs Bochs
|EIP: 0060:[<e0afd746>] EFLAGS: 00010202 CPU: 0
|EIP is at fd_do_task+0x396/0x420 [target_core_file]
| [<e0aa7884>] __transport_execute_tasks+0xd4/0x190 [target_core_mod]
| [<e0aa797c>] transport_execute_tasks+0x3c/0xf0 [target_core_mod]
|EIP: [<e0afd746>] fd_do_task+0x396/0x420 [target_core_file] SS:ESP 0068:dea47e90

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove unused struct fields
Jörn Engel [Thu, 24 Nov 2011 01:04:16 +0000 (02:04 +0100)]
target: remove unused struct fields

Some are never used, some are set but never read, dev_hoq_count is
incremented and decremented, but never read.

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix page length in emulated INQUIRY VPD page 86h
Roland Dreier [Tue, 22 Nov 2011 21:51:34 +0000 (13:51 -0800)]
target: Fix page length in emulated INQUIRY VPD page 86h

The LSB of the page length is at offset 3, not 2.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Handle 0 correctly in transport_get_sectors_6()
Roland Dreier [Tue, 22 Nov 2011 21:51:33 +0000 (13:51 -0800)]
target: Handle 0 correctly in transport_get_sectors_6()

SBC-3 says:

    A TRANSFER LENGTH field set to zero specifies that 256 logical
    blocks shall be written.  Any other value specifies the number
    of logical blocks that shall be written.

The old code was always just returning the value in the TRANSFER LENGTH
byte.  Fix this to return 256 if the byte is 0.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Don't return an error status for 0-length READ and WRITE
Roland Dreier [Tue, 22 Nov 2011 21:51:32 +0000 (13:51 -0800)]
target: Don't return an error status for 0-length READ and WRITE

IO commands with a TRANSFER LENGTH of 0 are not an error; for example,
for READ (10) and WRITE (10), SBC-3 says:

    A TRANSFER LENGTH field set to zero specifies that no logical blocks
    shall be read. This condition shall not be considered an error.

In case we have nothing to do, just complete the command with good status.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: Use kmemdup rather than duplicating its implementation
Thomas Meyer [Thu, 17 Nov 2011 22:43:40 +0000 (23:43 +0100)]
iscsi-target: Use kmemdup rather than duplicating its implementation

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: Add missing F_BIT for iscsi_tm_rsp
Nicholas Bellinger [Mon, 28 Nov 2011 06:25:14 +0000 (22:25 -0800)]
iscsi-target: Add missing F_BIT for iscsi_tm_rsp

This patch sets the missing ISCSI_FLAG_CMD_FINAL bit in
iscsit_send_task_mgt_rsp() for a struct iscsi_tm_rsp PDU.

This usage is hardcoded for all TM response PDUs in RFC-3720
section 10.6.

Reported-by: whucecil <whucecil1999@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: Fix residual count hanlding + remove iscsi_cmd->residual_count
Nicholas Bellinger [Wed, 16 Nov 2011 07:59:00 +0000 (23:59 -0800)]
iscsi-target: Fix residual count hanlding + remove iscsi_cmd->residual_count

This patch fixes iscsi-target handling of underflow where residual data is
causing an OOPs by using the incorrect iscsi_cmd_t->data_length initially
assigned in iscsit_allocate_se_cmd().  It resets iscsi_cmd_t->data_length
from se_cmd_t->data_length after transport_generic_allocate_tasks()
has been invoked in iscsit_handle_scsi_cmd() RX context, and converts
iscsi_cmd->residual_count usage to access iscsi_cmd->se_cmd.residual_count
to get the proper residual count set by target-core.

Reported-by: <lists@internyc.net>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Reject SCSI data overflow for fabrics using transport_generic_map_mem_to_cmd
Nicholas Bellinger [Wed, 16 Nov 2011 06:13:24 +0000 (22:13 -0800)]
target: Reject SCSI data overflow for fabrics using transport_generic_map_mem_to_cmd

This patch changes transport_generic_map_mem_to_cmd() to reject SCSI data
overflow and to send exception status with CHECK_CONDITION + TCM_INVALID_CDB_FIELD
for fabrics that are passing a pre-populated struct scatterlist (eg: tcm_loop
and iscsi-target) being mapped into se_cmd->t_data_sg and se_cmd->t_data_nents.

This addresses an OOPs where transport_allocate_data_tasks() would walk
the incorrect post OVERFLOW cmd->data_length value beyond the end of
the passed scatterlist.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the unused t_task_pt_sgl and t_task_pt_sgl_num se_cmd fields
Christoph Hellwig [Mon, 14 Nov 2011 16:36:31 +0000 (11:36 -0500)]
target: remove the unused t_task_pt_sgl and t_task_pt_sgl_num se_cmd fields

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the t_tasks_bidi se_cmd field
Christoph Hellwig [Mon, 14 Nov 2011 16:36:30 +0000 (11:36 -0500)]
target: remove the t_tasks_bidi se_cmd field

And use a SCF_BIDI flag instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the t_tasks_fua se_cmd field
Christoph Hellwig [Mon, 14 Nov 2011 16:36:29 +0000 (11:36 -0500)]
target: remove the t_tasks_fua se_cmd field

And use a SCF_FUA flag instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the se_ordered_node se_cmd field
Christoph Hellwig [Mon, 14 Nov 2011 16:36:28 +0000 (11:36 -0500)]
target: remove the se_ordered_node se_cmd field

We never walk ordered_cmd_list in the se_device, so remove all code related
to supporting it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the se_obj_ptr and se_orig_obj_ptr se_cmd fields
Christoph Hellwig [Mon, 14 Nov 2011 16:36:27 +0000 (11:36 -0500)]
target: remove the se_obj_ptr and se_orig_obj_ptr se_cmd fields

We already have a perfectly valid se_device pointer in the command, so
remove the mostly useless duplicates.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Drop config_item_name usage in fabric TFO->free_wwn()
Nicholas Bellinger [Sat, 12 Nov 2011 17:29:51 +0000 (09:29 -0800)]
target: Drop config_item_name usage in fabric TFO->free_wwn()

This patch removes config_item_name() informational usage of
TFO->free_wwn() treewide in loopback, tcm_fc, ib_srpt and
tcm_vhost module code.

Using v4 target_core_fabric_configfs.c logic, a fabric call for
config_item_name() in TFO->drop_wwn() context returns NULL as
target_fabric_drop_wwn() invoking config_item_put() ->
config_group_put() will release fabric_port->port_wwn.wwn_group
before the last config_item_put() -> TFO->drop_wwn() is
invoked.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Get rid of unused se_cmd_cache
Roland Dreier [Thu, 10 Nov 2011 19:22:47 +0000 (11:22 -0800)]
target: Get rid of unused se_cmd_cache

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Avoid compiler warnings about signed one-bit bitfields
Bart Van Assche [Tue, 8 Nov 2011 19:46:29 +0000 (20:46 +0100)]
target: Avoid compiler warnings about signed one-bit bitfields

Convert to unsigned bit fields for active I/O shutdown fields.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Improve system responsivity during I/O
Bart Van Assche [Sun, 6 Nov 2011 17:37:23 +0000 (18:37 +0100)]
target: Improve system responsivity during I/O

While testing ib_srpt I noticed that the target system became
rather unresponsive during intensive I/O. The patch below made
my target system responsive again during I/O without decreasing
performance.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: Fix sess allocation leak in iscsi_login_zero_tsih_s1
Nicholas Bellinger [Fri, 4 Nov 2011 18:36:38 +0000 (11:36 -0700)]
iscsi-target: Fix sess allocation leak in iscsi_login_zero_tsih_s1

This patch adds missing kfree() for an allocation in iscsi_login_zero_tsih_s1()
code, and make transport_init_session() check for IS_ERR() returns.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Address legacy PYX_TRANSPORT_* return code breakage
Nicholas Bellinger [Fri, 4 Nov 2011 09:36:16 +0000 (02:36 -0700)]
target: Address legacy PYX_TRANSPORT_* return code breakage

This patch removes legacy usage of PYX_TRANSPORT_* return codes in a number
of locations and addresses cases where transport_generic_request_failure()
was returning the incorrect sense upon CHECK_CONDITION status after the
v3.1 converson to use errno return codes.

This includes the conversion of transport_generic_request_failure() to
process cmd->scsi_sense_reason and handle extra TCM_RESERVATION_CONFLICT
before calling transport_send_check_condition_and_sense() to queue up
response status.  It also drops PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES legacy
usgae, and returns TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE w/ a response
for these cases.

transport_generic_allocate_tasks(), transport_generic_new_cmd(), backend
SCF_SCSI_DATA_SG_IO_CDB ->do_task(), and emulated ->execute_task() have
all been updated to set se_cmd->scsi_sense_reason and return errno codes
universally upon failure.  This includes cmd->scsi_sense_reason assignment
in target_core_alua.c, target_core_pr.c and target_core_cdb.c emulation code.

Finally it updates fabric modules to remove the legacy usage, and for
TFO->new_cmd_map() callers forwards return values outside of fabric code.
iscsi-target has also been updated to remove a handful of special cases
related to the cleanup and signaling QUEUE_FULL handling w/ ft_write_pending()

(v2: Drop extra SCF_SCSI_CDB_EXCEPTION check during failure from
     transport_generic_new_cmd, and re-add missing task->task_error_status
     assignment in transport_complete_task)

Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agopasemi_mac: Fix building as module
Ben Hutchings [Mon, 5 Dec 2011 19:44:22 +0000 (19:44 +0000)]
pasemi_mac: Fix building as module

Commit ded19addf9c937d83b9bfb4d73a836732569041b ('pasemic_mac*: Move
the PA Semi driver') inadvertently split pasemi_mac into two separate
modules with unresolved symbols.  Change it back into a single module.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonetback: Fix alert message.
Wei Liu [Mon, 5 Dec 2011 06:57:44 +0000 (06:57 +0000)]
netback: Fix alert message.

The original message in netback_init was 'kthread_run() fails', which should be
'kthread_create() fails'.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86
Linus Torvalds [Tue, 6 Dec 2011 01:27:55 +0000 (17:27 -0800)]
Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86

* 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86:
  toshiba_acpi: Fix machines that don't support HCI_SYSTEM_EVENT

12 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 6 Dec 2011 00:54:15 +0000 (16:54 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  intr_remapping: Fix section mismatch in ir_dev_scope_init()
  intel-iommu: Fix section mismatch in dmar_parse_rmrr_atsr_dev()
  x86, amd: Fix up numa_node information for AMD CPU family 15h model 0-0fh northbridge functions
  x86, AMD: Correct align_va_addr documentation
  x86/rtc, mrst: Don't register a platform RTC device for for Intel MID platforms
  x86/mrst: Battery fixes
  x86/paravirt: PTE updates in k(un)map_atomic need to be synchronous, regardless of lazy_mmu mode
  x86: Fix "Acer Aspire 1" reboot hang
  x86/mtrr: Resolve inconsistency with Intel processor manual
  x86: Document rdmsr_safe restrictions
  x86, microcode: Fix the failure path of microcode update driver init code
  Add TAINT_FIRMWARE_WORKAROUND on MTRR fixup
  x86/mpparse: Account for bus types other than ISA and PCI
  x86, mrst: Change the pmic_gpio device type to IPC
  mrst: Added some platform data for the SFI translations
  x86,mrst: Power control commands update
  x86/reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot
  x86, UV: Fix UV2 hub part number
  x86: Add user_mode_vm check in stack_overflow_check

12 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 6 Dec 2011 00:54:00 +0000 (16:54 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Fix loss of notification with multi-event
  perf, x86: Force IBS LVT offset assignment for family 10h
  perf, x86: Disable PEBS on SandyBridge chips
  trace_events_filter: Use rcu_assign_pointer() when setting ftrace_event_call->filter
  perf session: Fix crash with invalid CPU list
  perf python: Fix undefined symbol problem
  perf/x86: Enable raw event access to Intel offcore events
  perf: Don't use -ENOSPC for out of PMU resources
  perf: Do not set task_ctx pointer in cpuctx if there are no events in the context
  perf/x86: Fix PEBS instruction unwind
  oprofile, x86: Fix crash when unloading module (nmi timer mode)
  oprofile: Fix crash when unloading module (hr timer mode)

12 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 6 Dec 2011 00:53:43 +0000 (16:53 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clockevents: Set noop handler in clockevents_exchange_device()
  tick-broadcast: Stop active broadcast device when replacing it
  clocksource: Fix bug with max_deferment margin calculation
  rtc: Fix some bugs that allowed accumulating time drift in suspend/resume
  rtc: Disable the alarm in the hardware

12 years agoMerge branches 'core-urgent-for-linus' and 'irq-urgent-for-linus' of git://git.kernel...
Linus Torvalds [Tue, 6 Dec 2011 00:51:21 +0000 (16:51 -0800)]
Merge branches 'core-urgent-for-linus' and 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  slab, lockdep: Fix silly bug

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Fix race condition when stopping the irq thread

12 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 6 Dec 2011 00:50:24 +0000 (16:50 -0800)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched, x86: Avoid unnecessary overflow in sched_clock
  sched: Fix buglet in return_cfs_rq_runtime()
  sched: Avoid SMT siblings in select_idle_sibling() if possible
  sched: Set the command name of the idle tasks in SMP kernels
  sched, rt: Provide means of disabling cross-cpu bandwidth sharing
  sched: Document wait_for_completion_*() return values
  sched_fair: Fix a typo in the comment describing update_sd_lb_stats
  sched: Add a comment to effective_load() since it's a pain

12 years agoMerge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
Linus Torvalds [Mon, 5 Dec 2011 23:35:16 +0000 (15:35 -0800)]
Merge branch 'for-linus' of git://git390.marist.edu/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] ap: Setup timer for sending messages after reset.
  [S390] cio: fix chsc_chp_vary
  [S390] cio: provide fake irb for transport mode IO
  [S390] cio: disallow driver io for known to be broken paths
  [S390] hibernate: directly trigger subchannel evaluation
  [S390] remove reset of system call restart on psw changes
  [S390] add missing .set function for NT_S390_LAST_BREAK regset
  [S390] fix page change underindication in pgste_update_all
  [S390] ptrace inferior call interactions with TIF_SYSCALL
  [S390] kdump: Replace is_kdump_kernel() with OLDMEM_BASE check

12 years agor8169: fix Rx index race between FIFO overflow recovery and NAPI handler.
françois romieu [Sun, 4 Dec 2011 20:30:52 +0000 (20:30 +0000)]
r8169: fix Rx index race between FIFO overflow recovery and NAPI handler.

Since 92fc43b4159b518f5baae57301f26d770b0834c9, rtl8169_tx_timeout ends up
resetting Rx and Tx indexes and thus racing with the NAPI handler via
-> rtl8169_hw_reset
   -> rtl_hw_reset
      -> rtl8169_init_ring_indexes

What about returning to the original state ?

rtl_hw_reset is only used by rtl8169_hw_reset and rtl8169_init_one.

The latter does not need rtl8169_init_ring_indexes because the indexes
still contain their original values from the newly allocated network
device private data area (i.e. 0).

rtl8169_hw_reset is used by:
1. rtl8169_down
   Helper for rtl8169_close. rtl8169_open explicitely inits the indexes
   anyway.
2. rtl8169_pcierr_interrupt
   Indexes are set by rtl8169_reinit_task.
3. rtl8169_interrupt
   rtl8169_hw_reset is needed when the device goes down. See 1.
4. rtl_shutdown
   System shutdown handler. Indexes are irrelevant.
5. rtl8169_reset_task
   Indexes must be set before rtl_hw_start is called.
6. rtl8169_tx_timeout
   Indexes should not be set. This is the job of rtl8169_reset_task anyway.

The removal of rtl8169_hw_reset in rtl8169_tx_timeout and its move in
rtl8169_reset_task do not change the analysis.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: hayeswang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agor8169: Rx FIFO overflow fixes.
françois romieu [Sun, 4 Dec 2011 20:30:45 +0000 (20:30 +0000)]
r8169: Rx FIFO overflow fixes.

Realtek has specified that the post 8168c gigabit chips and the post
8105e fast ethernet chips recover automatically from a Rx FIFO overflow.
The driver does not need to clear the RxFIFOOver bit of IntrStatus and
it should rather avoid messing it.

The implementation deserves some explanation:
1. events outside of the intr_event bit mask are now ignored. It enforces
   a no-processing policy for the events that either should not be there
   or should be ignored.

2. RxFIFOOver was already ignored in rtl_cfg_infos[RTL_CFG_1] for the
   whole 8168 line of chips with two exceptions:
   - RTL_GIGA_MAC_VER_22 since b5ba6d12bdac21bc0620a5089e0f24e362645efd
     ("use RxFIFO overflow workaround for 8168c chipset.").
     This one should now be correctly handled.
   - RTL_GIGA_MAC_VER_11 (8168b) which requires a different Rx FIFO
     overflow processing.

   Though it does not conform to Realtek suggestion above, the updated
   driver includes no change for RTL_GIGA_MAC_VER_12 and RTL_GIGA_MAC_VER_17.
   Both are 8168b. RTL_GIGA_MAC_VER_12 is common and a bit old so I'd rather
   wait for experimental evidence that the change suggested by Realtek really
   helps or does not hurt in unexpected ways.

   Removed case statements in rtl8169_interrupt are only 8168 relevant.

3. RxFIFOOver is masked for post 8105e 810x chips, namely the sole 8105e
   (RTL_GIGA_MAC_VER_30) itself.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: hayeswang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agogpio: fix a build failure on KS8695 GPIO
Linus Walleij [Mon, 5 Dec 2011 13:47:48 +0000 (14:47 +0100)]
gpio: fix a build failure on KS8695 GPIO

I screwed up by compiling that driver for the machine rather
than the arch. Correcting this fixes the build error.

Cc: Grant Likely <grant.likely@secretlab.ca>
Reported-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoASoC: Remove references to corgi and spitz from machine driver document
Mark Brown [Mon, 5 Dec 2011 18:27:25 +0000 (18:27 +0000)]
ASoC: Remove references to corgi and spitz from machine driver document

They're not currently actively worked on, the hardware being rather
obsolete by now.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
12 years agoftrace: Fix hash record accounting bug
Steven Rostedt [Sat, 5 Nov 2011 00:32:39 +0000 (20:32 -0400)]
ftrace: Fix hash record accounting bug

If the set_ftrace_filter is cleared by writing just whitespace to
it, then the filter hash refcounts will be decremented but not
updated. This causes two bugs:

1) No functions will be enabled for tracing when they all should be

2) If the users clears the set_ftrace_filter twice, it will crash ftrace:

------------[ cut here ]------------
WARNING: at /home/rostedt/work/git/linux-trace.git/kernel/trace/ftrace.c:1384 __ftrace_hash_rec_update.part.27+0x157/0x1a7()
Modules linked in:
Pid: 2330, comm: bash Not tainted 3.1.0-test+ #32
Call Trace:
 [<ffffffff81051828>] warn_slowpath_common+0x83/0x9b
 [<ffffffff8105185a>] warn_slowpath_null+0x1a/0x1c
 [<ffffffff810ba362>] __ftrace_hash_rec_update.part.27+0x157/0x1a7
 [<ffffffff810ba6e8>] ? ftrace_regex_release+0xa7/0x10f
 [<ffffffff8111bdfe>] ? kfree+0xe5/0x115
 [<ffffffff810ba51e>] ftrace_hash_move+0x2e/0x151
 [<ffffffff810ba6fb>] ftrace_regex_release+0xba/0x10f
 [<ffffffff8112e49a>] fput+0xfd/0x1c2
 [<ffffffff8112b54c>] filp_close+0x6d/0x78
 [<ffffffff8113a92d>] sys_dup3+0x197/0x1c1
 [<ffffffff8113a9a6>] sys_dup2+0x4f/0x54
 [<ffffffff8150cac2>] system_call_fastpath+0x16/0x1b
---[ end trace 77a3a7ee73794a02 ]---

Link: http://lkml.kernel.org/r/20111101141420.GA4918@debian
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agoperf: Fix parsing of __print_flags() in TP_printk()
Steven Rostedt [Fri, 4 Nov 2011 20:32:25 +0000 (16:32 -0400)]
perf: Fix parsing of __print_flags() in TP_printk()

A update is made to the sched:sched_switch event that adds some
logic to the first parameter of the __print_flags() that shows the
state of tasks. This change cause perf to fail parsing the flags.

A simple fix is needed to have the parser be able to process ops
within the argument.

Cc: stable@vger.kernel.org
Reported-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agojump_label: jump_label_inc may return before the code is patched
Gleb Natapov [Tue, 18 Oct 2011 17:55:51 +0000 (19:55 +0200)]
jump_label: jump_label_inc may return before the code is patched

If cpu A calls jump_label_inc() just after atomic_add_return() is
called by cpu B, atomic_inc_not_zero() will return value greater then
zero and jump_label_inc() will return to a caller before jump_label_update()
finishes its job on cpu B.

Link: http://lkml.kernel.org/r/20111018175551.GH17571@redhat.com
Cc: stable@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agoftrace: Remove force undef config value left for testing
Steven Rostedt [Fri, 4 Nov 2011 14:45:23 +0000 (10:45 -0400)]
ftrace: Remove force undef config value left for testing

A forced undef of a config value was used for testing and was
accidently left in during the final commit. This causes x86 to
run slower than needed while running function tracing as well
as causes the function graph selftest to fail when DYNMAIC_FTRACE
is not set. This is because the code in MCOUNT expects the ftrace
code to be processed with the config value set that happened to
be forced not set.

The forced config option was left in by:
    commit 6331c28c962561aee59e5a493b7556a4bb585957
    ftrace: Fix dynamic selftest failure on some archs

Link: http://lkml.kernel.org/r/20111102150255.GA6973@debian
Cc: stable@vger.kernel.org
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agotracing: Restore system filter behavior
Li Zefan [Tue, 1 Nov 2011 01:09:35 +0000 (09:09 +0800)]
tracing: Restore system filter behavior

Though not all events have field 'prev_pid', it was allowed to do this:

  # echo 'prev_pid == 100' > events/sched/filter

but commit 75b8e98263fdb0bfbdeba60d4db463259f1fe8a2 (tracing/filter: Swap
entire filter of events) broke it without any reason.

Link: http://lkml.kernel.org/r/4EAF46CF.8040408@cn.fujitsu.com
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agotracing: fix event_subsystem ref counting
Ilya Dryomov [Mon, 31 Oct 2011 09:07:42 +0000 (11:07 +0200)]
tracing: fix event_subsystem ref counting

Fix a bug introduced by e9dbfae5, which prevents event_subsystem from
ever being released.

Ref_count was added to keep track of subsystem users, not for counting
events.  Subsystem is created with ref_count = 1, so there is no need to
increment it for every event, we have nr_events for that.  Fix this by
touching ref_count only when we actually have a new user -
subsystem_open().

Cc: stable@vger.kernel.org
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Link: http://lkml.kernel.org/r/1320052062-7846-1-git-send-email-idryomov@gmail.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agoMerge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville...
David S. Miller [Mon, 5 Dec 2011 18:23:14 +0000 (13:23 -0500)]
Merge branch 'for-davem' of git://git./linux/kernel/git/linville/wireless

12 years agoipv4: Fix peer validation on cached lookup.
David S. Miller [Mon, 5 Dec 2011 18:21:42 +0000 (13:21 -0500)]
ipv4: Fix peer validation on cached lookup.

If ipv4_valdiate_peer() fails during a cached entry lookup,
we'll NULL derer since the loop iterator assumes rth is not
NULL.

Letting this be handled as a failure is just bogus, so just make it
not fail.  If we have trouble getting a non-NULL neighbour for the
redirected gateway, just restore the original gateway and continue.

The very next use of this cached route will try again.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agotoshiba_acpi: Fix machines that don't support HCI_SYSTEM_EVENT
Seth Forshee [Wed, 16 Nov 2011 23:37:45 +0000 (17:37 -0600)]
toshiba_acpi: Fix machines that don't support HCI_SYSTEM_EVENT

The Satellite C670-10V generates notifications for hotkeys but does
not support HCI_SYSTEM_EVENT. As a result when a hotkey is pressed
it gets stuck in an infinite loop in toshiba_acpi_notify. To fix
this, detect whether or not HCI_SYSTEM_EVENT is supported up-front
and don't try to read system events if it isn't supported. In
addition, limit the number of retries when reading HCI_SYSTEM_EVENT
fails so that this loop cannot run unbounded.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
12 years agoARM: OMAP1: recalculate loops per jiffy after dpll1 reprogram
Janusz Krzysztofik [Thu, 1 Dec 2011 20:13:02 +0000 (21:13 +0100)]
ARM: OMAP1: recalculate loops per jiffy after dpll1 reprogram

Otherwise timing is inaccurate, resulting in devices which depend on it,
like omap-keypad, broken.

Tested on Amstrad Delta.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
[tony@atomide.com: removed comment referencing a development branch]
Signed-off-by: Tony Lindgren <tony@atomide.com>
12 years agointr_remapping: Fix section mismatch in ir_dev_scope_init()
Sergey Senozhatsky [Wed, 26 Oct 2011 16:15:07 +0000 (19:15 +0300)]
intr_remapping: Fix section mismatch in ir_dev_scope_init()

Fix:

 Section mismatch in reference from the function
 ir_dev_scope_init() to the function
 .init.text:dmar_dev_scope_init() The function
 ir_dev_scope_init() references the function __init dmar_dev_scope_init().

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Youquan Song <youquan.song@intel.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Link: http://lkml.kernel.org/r/20111026161507.GB10103@swordfish
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agointel-iommu: Fix section mismatch in dmar_parse_rmrr_atsr_dev()
Sergey Senozhatsky [Wed, 26 Oct 2011 15:45:39 +0000 (18:45 +0300)]
intel-iommu: Fix section mismatch in dmar_parse_rmrr_atsr_dev()

dmar_parse_rmrr_atsr_dev() calls rmrr_parse_dev() and
atsr_parse_dev() which are both marked as __init.

Section mismatch in reference from the function
dmar_parse_rmrr_atsr_dev() to the function
.init.text:dmar_parse_dev_scope() The function
dmar_parse_rmrr_atsr_dev() references the function __init
dmar_parse_dev_scope().

Section mismatch in reference from the function
dmar_parse_rmrr_atsr_dev() to the function
.init.text:dmar_parse_dev_scope() The function
dmar_parse_rmrr_atsr_dev() references the function __init
dmar_parse_dev_scope().

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: iommu@lists.linux-foundation.org
Cc: Joerg Roedel <joerg.roedel@amd.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Link: http://lkml.kernel.org/r/20111026154539.GA10103@swordfish
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86, amd: Fix up numa_node information for AMD CPU family 15h model 0-0fh northbridge...
Andreas Herrmann [Fri, 2 Dec 2011 07:21:43 +0000 (08:21 +0100)]
x86, amd: Fix up numa_node information for AMD CPU family 15h model 0-0fh northbridge functions

I've received complaints that the numa_node attribute for family
15h model 00-0fh (e.g. Interlagos) northbridge functions shows
-1 instead of the proper node ID.

Correct this with attached quirks (similar to quirks for other
AMD CPU families used in multi-socket systems).

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Frank Arnold <frank.arnold@amd.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/20111202072143.GA31916@alberich.amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86, AMD: Correct align_va_addr documentation
Borislav Petkov [Mon, 21 Nov 2011 11:10:19 +0000 (12:10 +0100)]
x86, AMD: Correct align_va_addr documentation

Commit dfb09f9b7ab0 ("x86, amd: Avoid cache aliasing penalties
on AMD family 15h") introduced a kernel command line parameter
called 'align_va_addr' which still refers to arguments used in
an earlier version of the patch and which got changed without
updating the documentation. Correct that omission.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Frank Arnold <frank.arnold@amd.com>
Link: http://lkml.kernel.org/r/1321873819-29541-1-git-send-email-bp@amd64.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoperf stat: Failure with "Operation not supported"
Anton Blanchard [Thu, 1 Dec 2011 22:38:33 +0000 (09:38 +1100)]
perf stat: Failure with "Operation not supported"

perf stat is failing on PowerPC:

  Error: open_counter returned with 95 (Operation not supported). /bin/dmesg may provide additional information.

  Fatal: Not all events could be opened.

commit 370faf1dd046 (perf stat: Fail softly on unsupported events)
added a check for failure returning ENOENT, but the POWER backend
returns EOPNOTSUPP. It looks like alpha, blackfin and mips do the
same.

With the patch applied, things work as expected:

 Performance counter stats for '/bin/true':

          0.362176 task-clock                #    0.623 CPUs utilized
                 0 context-switches          #    0.000 M/sec
                 0 CPU-migrations            #    0.000 M/sec
                28 page-faults               #    0.077 M/sec
         1,677,020 cycles                    #    4.630 GHz
   <not supported> stalled-cycles-frontend
   <not supported> stalled-cycles-backend
           431,220 instructions              #    0.26  insns per cycle
           101,889 branches                  #  281.325 M/sec
             4,145 branch-misses             #    4.07% of all branches

       0.000581361 seconds time elapsed

Cc: <stable@kernel.org> # 3.0+
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20111202093833.5fef7226@kryten
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
12 years agox86/rtc, mrst: Don't register a platform RTC device for for Intel MID platforms
Mathias Nyman [Tue, 15 Nov 2011 22:46:52 +0000 (14:46 -0800)]
x86/rtc, mrst: Don't register a platform RTC device for for Intel MID platforms

Intel MID x86 platforms have a memory mapped virtual RTC
instead.  No MID platform have the default ports (and
accessing them may do weird stuff).

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: feng.tang@intel.com
Cc: Feng Tang <feng.tang@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86/mrst: Battery fixes
Major Lee [Tue, 15 Nov 2011 23:31:23 +0000 (15:31 -0800)]
x86/mrst: Battery fixes

When DCDC input line over current detecting, PMIC will change
charging current automatically.  Logging event is enough.

Signed-off-by: Major Lee <major_lee@wistron.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
[fix build]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86/paravirt: PTE updates in k(un)map_atomic need to be synchronous, regardless of...
Konrad Rzeszutek Wilk [Tue, 15 Nov 2011 22:49:09 +0000 (14:49 -0800)]
x86/paravirt: PTE updates in k(un)map_atomic need to be synchronous, regardless of lazy_mmu mode

Fix an outstanding issue that has been reported since 2.6.37.
Under a heavy loaded machine processing "fork()" calls could
crash with:

BUG: unable to handle kernel paging request at f573fc8c
IP: [<c01abc54>] swap_count_continued+0x104/0x180
*pdpt = 000000002a3b9027 *pde = 0000000001bed067 *pte = 0000000000000000 Oops: 0000 [#1] SMP
Modules linked in:
Pid: 1638, comm: apache2 Not tainted 3.0.4-linode37 #1
EIP: 0061:[<c01abc54>] EFLAGS: 00210246 CPU: 3
EIP is at swap_count_continued+0x104/0x180
.. snip..
Call Trace:
 [<c01ac222>] ? __swap_duplicate+0xc2/0x160
 [<c01040f7>] ? pte_mfn_to_pfn+0x87/0xe0
 [<c01ac2e4>] ? swap_duplicate+0x14/0x40
 [<c01a0a6b>] ? copy_pte_range+0x45b/0x500
 [<c01a0ca5>] ? copy_page_range+0x195/0x200
 [<c01328c6>] ? dup_mmap+0x1c6/0x2c0
 [<c0132cf8>] ? dup_mm+0xa8/0x130
 [<c013376a>] ? copy_process+0x98a/0xb30
 [<c013395f>] ? do_fork+0x4f/0x280
 [<c01573b3>] ? getnstimeofday+0x43/0x100
 [<c010f770>] ? sys_clone+0x30/0x40
 [<c06c048d>] ? ptregs_clone+0x15/0x48
 [<c06bfb71>] ? syscall_call+0x7/0xb

The problem is that in copy_page_range() we turn lazy mode on,
and then in swap_entry_free() we call swap_count_continued()
which ends up in:

         map = kmap_atomic(page, KM_USER0) + offset;

and then later we touch *map.

Since we are running in batched mode (lazy) we don't actually
set up the PTE mappings and the kmap_atomic is not done
synchronously and ends up trying to dereference a page that has
not been set.

Looking at kmap_atomic_prot_pfn(), it uses
'arch_flush_lazy_mmu_mode' and doing the same in
kmap_atomic_prot() and __kunmap_atomic() makes the problem go
away.

Interestingly, commit b8bcfe997e4615 ("x86/paravirt: remove lazy
mode in interrupts") removed part of this to fix an interrupt
issue - but it went to far and did not consider this scenario.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Mon, 5 Dec 2011 16:05:44 +0000 (11:05 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless into for-davem

12 years agoMerge branch 'ucode' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp into...
Ingo Molnar [Mon, 5 Dec 2011 15:38:51 +0000 (16:38 +0100)]
Merge branch 'ucode' of git://git./linux/kernel/git/bp/bp into x86/urgent

12 years agox86: Fix "Acer Aspire 1" reboot hang
Peter Chubb [Mon, 5 Dec 2011 13:53:53 +0000 (16:53 +0300)]
x86: Fix "Acer Aspire 1" reboot hang

Looks like on some Acer Aspire 1s with older bioses, reboot via bios
fails.  It works on my machine, (with BIOS version 0.3310) but
not on some others (BIOS version 0.3309).

There's a log of problems at:

  https://bbs.archlinux.org/viewtopic.php?id=124136

This patch adds a different callback to the reboot quirk table,
to allow rebooting via keybaord controller.

Reported-by: Uroš Vampl <mobile.leecher@gmail.com>
Tested-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/1323093233-9481-1-git-send-email-anarsoul@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86/mtrr: Resolve inconsistency with Intel processor manual
Ajaykumar Hotchandani [Fri, 11 Nov 2011 13:01:57 +0000 (18:31 +0530)]
x86/mtrr: Resolve inconsistency with Intel processor manual

Following is from Notes of section 11.5.3 of Intel processor
manual available at:

  http://www.intel.com/Assets/PDF/manual/325384.pdf

For the Pentium 4 and Intel Xeon processors, after the sequence of
steps given above has been executed, the cache lines containing the
code between the end of the WBINVD instruction and before the
MTRRS have actually been disabled may be retained in the cache
hierarchy. Here, to remove code from the cache completely, a
second WBINVD instruction must be executed after the MTRRs have
been disabled.

This patch provides resolution for that.

Ideally, I will like to make changes only for Pentium 4 and Xeon
processors. But, I am not finding easier way to do it.
And, extra wbinvd() instruction does not hurt much for other
processors.

Signed-off-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Link: http://lkml.kernel.org/r/4EBD1CC5.3030008@oracle.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoMerge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/roste...
Ingo Molnar [Mon, 5 Dec 2011 13:34:00 +0000 (14:34 +0100)]
Merge branch 'tip/perf/urgent' of git://git./linux/kernel/git/rostedt/linux-trace into perf/urgent

12 years agox86: Document rdmsr_safe restrictions
Borislav Petkov [Mon, 5 Dec 2011 13:28:37 +0000 (14:28 +0100)]
x86: Document rdmsr_safe restrictions

Recently, I got bitten by using rdmsr_safe too early in the boot
process. Document its shortcomings for future reference.

Link: http://lkml.kernel.org/r/4ED5B70F.606@lwfinger.net
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
12 years agox86, microcode: Fix the failure path of microcode update driver init code
Srivatsa S. Bhat [Mon, 7 Nov 2011 12:35:32 +0000 (18:05 +0530)]
x86, microcode: Fix the failure path of microcode update driver init code

The microcode update driver's initialization code does not handle
failures correctly. This patch fixes this issue.

Signed-off-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20111107123530.12164.31227.stgit@srivatsabhat.in.ibm.com
Link: http://lkml.kernel.org/r/4ED8E2270200007800065120@nat28.tlf.novell.com
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
12 years agoAdd TAINT_FIRMWARE_WORKAROUND on MTRR fixup
Prarit Bhargava [Tue, 18 Oct 2011 17:24:10 +0000 (13:24 -0400)]
Add TAINT_FIRMWARE_WORKAROUND on MTRR fixup

TAINT_FIRMWARE_WORKAROUND should be set when an MTRR fixup
is done.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/1318958650-12447-1-git-send-email-prarit@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86/mpparse: Account for bus types other than ISA and PCI
Bjorn Helgaas [Sun, 25 Sep 2011 21:29:00 +0000 (15:29 -0600)]
x86/mpparse: Account for bus types other than ISA and PCI

In commit f8924e770e04 ("x86: unify mp_bus_info"), the 32-bit
and 64-bit versions of MP_bus_info were rearranged to match each
other better.  Unfortunately it introduced a regression: prior
to that change we used to always set the mp_bus_not_pci bit,
then clear it if we found a PCI bus.  After it, we set
mp_bus_not_pci for ISA buses, clear it for PCI buses, and leave
it alone otherwise.

In the cases of ISA and PCI, there's not much difference.  But
ISA is not the only non-PCI bus, so it's better to always set
mp_bus_not_pci and clear it only for PCI.

Without this change, Dan's Dell PowerEdge 4200 panics on boot
with a log indicating interrupt routing trouble unless the
"noapic" option is supplied.  With this change, the machine
boots reliably without "noapic".

Fixes http://bugs.debian.org/586494

Reported-bisected-and-tested-by: Dan McGrath <troubledaemon@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org # 2.6.26+
Cc: Dan McGrath <troubledaemon@gmail.com>
Cc: Alexey Starikovskiy <aystarik@gmail.com>
[jrnieder@gmail.com: clarified commit message]
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Link: http://lkml.kernel.org/r/20111122215000.GA9151@elie.hsd1.il.comcast.net
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86, mrst: Change the pmic_gpio device type to IPC
Feng Tang [Wed, 16 Nov 2011 18:32:34 +0000 (18:32 +0000)]
x86, mrst: Change the pmic_gpio device type to IPC

In latest firmware's SFI tables, pmic_gpio has been set to
IPC type of device, so we need handle it too.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agomrst: Added some platform data for the SFI translations
Jekyll Lai [Wed, 16 Nov 2011 18:01:20 +0000 (18:01 +0000)]
mrst: Added some platform data for the SFI translations

Add SFI glue for the following devices:

tca6416: a gpio expander compatible with max7315
mpu3050: gyro sensor

Both of these actual drivers are already upstream

Signed-off-by: Jekyll Lai <jekyll_lai@wistron.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86,mrst: Power control commands update
Jacob Pan [Wed, 16 Nov 2011 16:07:22 +0000 (16:07 +0000)]
x86,mrst: Power control commands update

On the Intel MID devices SCU commands are issued to manage power
off and the like. We need to issue different ones for
non-Lincroft based devices.

Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86/reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot
Rafael J. Wysocki [Tue, 15 Nov 2011 23:19:51 +0000 (00:19 +0100)]
x86/reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot

Dell OptiPlex 990 is known to require PCI reboot, so add it to
the reboot blacklist in pci_reboot_dmi_table[].

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Link: http://lkml.kernel.org/r/201111160019.51303.rjw@sisk.pl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoARM: davinci: dm365 evm: align nand partition table to u-boot
Shankarmurthy,Akshay [Wed, 9 Nov 2011 12:25:20 +0000 (17:55 +0530)]
ARM: davinci: dm365 evm: align nand partition table to u-boot

Current partition information maintained in kernel does not match with
u-boot, this leads to corruption of u-boot env when we update uImage
from kernel. Patch fixes it to match with u-boot partition information.

Signed-off-by: Shankarmurthy,Akshay <akshay.s@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
12 years agoARM: davinci: da850 evm: change audio edma event queue to EVENTQ_0
Manjunathappa, Prakash [Thu, 10 Nov 2011 06:13:21 +0000 (11:43 +0530)]
ARM: davinci: da850 evm: change audio edma event queue to EVENTQ_0

On OMAP-L138 platform, EDMA event queue 0 should be used for audio
transfers so that they are not starved by video data moving on event queue 1.

Commit 48519f0ae03bc7e86b3dc93e56f1334d53803770 (ASoC: davinci: let platform
data define edma queue numbers) had a side-effect of changing this behavior
by making the driver actually honor the platform data passed.

Fix this now by passing event queue 0 as the queue to be used for audio
transfers.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Cc: <stable@vger.kernel.org> # v2.6.36.x and above
12 years agoARM: davinci: dm646x evm: wrong register used in setup_vpif_input_channel_mode
Hans Verkuil [Mon, 14 Nov 2011 18:20:49 +0000 (19:20 +0100)]
ARM: davinci: dm646x evm: wrong register used in setup_vpif_input_channel_mode

The function setup_vpif_input_channel_mode() used the VSCLKDIS register
instead of VIDCLKCTL. This meant that when in HD mode videoport channel 0
used a different clock from channel 1.

Clearly a copy-and-paste error.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Cc: stable@kernel.org
12 years agoARM: davinci: dm646x does not have a DSP domain
Sekhar Nori [Mon, 14 Nov 2011 20:12:08 +0000 (01:42 +0530)]
ARM: davinci: dm646x does not have a DSP domain

Fix the incorrect classification of DSP clock into a
seperate DSP domain on DM646x.

Per the reference guide (http://www.ti.com/lit/ug/spruep9e/spruep9e.pdf)
there is only one "AlwaysON" power domain on DM6467.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
12 years agoARM: davinci: psc: fix incorrect offsets
Murali Karicheri [Mon, 14 Nov 2011 20:12:07 +0000 (01:42 +0530)]
ARM: davinci: psc: fix incorrect offsets

Seperate PDSTAT and PDCTL registers are defined for
domain 0 and domain 1 where as the code always reads
the domain 0 PDSTAT register and domain 1 PDCTL register.

Fix this issue. While at it, introduce usage of macros
for register masks to improve readability.

Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
12 years agoARM: davinci: psc: fix incorrect mask
Murali Karicheri [Mon, 14 Nov 2011 20:12:06 +0000 (01:42 +0530)]
ARM: davinci: psc: fix incorrect mask

There are 5 LSB bits defined in PDSTAT and the code
currently uses a mask of 1 bit to check the status.

Use a proper mask per the hardware specification.
While at it, use a #define for the mask to improve
readability.

Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
12 years agox86, UV: Fix UV2 hub part number
Jack Steiner [Tue, 29 Nov 2011 21:00:58 +0000 (15:00 -0600)]
x86, UV: Fix UV2 hub part number

There was a mixup when the SGI UV2 hub chip was sent to be
fabricated, and it ended up with the wrong part number in the
HRP_NODE_ID mmr. Future versions of the chip will (may) have the
correct part number. Change the UV infrastructure to recognize
both part numbers as valid IDs of a UV2 hub chip.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/20111129210058.GA20452@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agox86: Add user_mode_vm check in stack_overflow_check
Mitsuo Hayasaka [Tue, 29 Nov 2011 06:08:21 +0000 (15:08 +0900)]
x86: Add user_mode_vm check in stack_overflow_check

The kernel stack overflow is checked in stack_overflow_check(),
which may wrongly detect the overflow if the stack pointer in
user space points to the kernel stack intentionally or
accidentally. So, the actual overflow is never detected after
this misdetection because WARN_ONCE() is used on the detection
of it.

This patch adds user-mode-vm checking before it to avoid this
problem and bails out early if the user stack is used.

Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com>
Cc: yrl.pp-manager.tt@hitachi.com
Cc: Randy Dunlap <rdunlap@xenotime.net>
Link: http://lkml.kernel.org/r/20111129060821.11076.55315.stgit@ltc219.sdl.hitachi.co.jp
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
12 years agoMerge branch 'perf/urgent' of git://github.com/acmel/linux into perf/urgent
Ingo Molnar [Mon, 5 Dec 2011 09:32:39 +0000 (10:32 +0100)]
Merge branch 'perf/urgent' of git://github.com/acmel/linux into perf/urgent

12 years agoslab, lockdep: Fix silly bug
Peter Zijlstra [Mon, 28 Nov 2011 20:12:40 +0000 (21:12 +0100)]
slab, lockdep: Fix silly bug

Commit 30765b92 ("slab, lockdep: Annotate the locks before using
them") moves the init_lock_keys() call from after g_cpucache_up =
FULL, to before it. And overlooks the fact that init_node_lock_keys()
tests for it and ignores everything !FULL.

Introduce a LATE stage and change the lockdep test to be <LATE.

Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoperf: Fix loss of notification with multi-event
Peter Zijlstra [Sat, 26 Nov 2011 01:47:31 +0000 (02:47 +0100)]
perf: Fix loss of notification with multi-event

When you do:
        $ perf record -e cycles,cycles,cycles noploop 10

You expect about 10,000 samples for each event, i.e., 10s at
1000samples/sec. However, this is not what's happening. You
get much fewer samples, maybe 3700 samples/event:

$ perf report -D | tail -15
Aggregated stats:
           TOTAL events:      10998
            MMAP events:         66
            COMM events:          2
          SAMPLE events:      10930
cycles stats:
           TOTAL events:       3644
          SAMPLE events:       3644
cycles stats:
           TOTAL events:       3642
          SAMPLE events:       3642
cycles stats:
           TOTAL events:       3644
          SAMPLE events:       3644

On a Intel Nehalem or even AMD64, there are 4 counters capable
of measuring cycles, so there is plenty of space to measure those
events without multiplexing (even with the NMI watchdog active).
And even with multiplexing, we'd expect roughly the same number
of samples per event.

The root of the problem was that when the event that caused the buffer
to become full was not the first event passed on the cmdline, the user
notification would get lost. The notification was sent to the file
descriptor of the overflowed event but the perf tool was not polling
on it.  The perf tool aggregates all samples into a single buffer,
i.e., the buffer of the first event. Consequently, it assumes
notifications for any event will come via that descriptor.

The seemingly straight forward solution of moving the waitq into the
ringbuffer object doesn't work because of life-time issues. One could
perf_event_set_output() on a fd that you're also blocking on and cause
the old rb object to be freed while its waitq would still be
referenced by the blocked thread -> FAIL.

Therefore link all events to the ringbuffer and broadcast the wakeup
from the ringbuffer object to all possible events that could be waited
upon. This is rather ugly, and we're open to better solutions but it
works for now.

Reported-by: Stephane Eranian <eranian@google.com>
Finished-by: Stephane Eranian <eranian@google.com>
Reviewed-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20111126014731.GA7030@quad
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoperf, x86: Force IBS LVT offset assignment for family 10h
Robert Richter [Tue, 8 Nov 2011 18:20:44 +0000 (19:20 +0100)]
perf, x86: Force IBS LVT offset assignment for family 10h

On AMD family 10h we see firmware bug messages like the following:

 [Firmware Bug]: cpu 6, try to use APIC500 (LVT offset 0) for vector 0x10400, but the register is already in use for vector 0xf9 on another cpu
 [Firmware Bug]: cpu 6, IBS interrupt offset 0 not available (MSRC001103A=0x0000000000000100)
 [Firmware Bug]: using offset 1 for IBS interrupts
 [Firmware Bug]: workaround enabled for IBS LVT offset
 perf: AMD IBS detected (0x00000007)

We always see this, since the offsets are not assigned by the BIOS for
this family. Force LVT offset assignment in this case. If the OS
assignment fails, fallback to BIOS settings and try to setup this.

The fallback to BIOS settings weakens the family check since
force_ibs_eilvt_setup() may fail e.g. in case of virtual machines.
But setup may still succeed if BIOS offsets are correct.

Other families don't have a workaround implemented that assigns LVT
offsets. It's ok, to drop calling force_ibs_eilvt_setup() for that
families.

With the patch the [Firmware Bug] messages vanish. We see now:

 IBS: LVT offset 1 assigned
 perf: AMD IBS detected (0x00000007)

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20111109162225.GO12451@erda.amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoperf, x86: Disable PEBS on SandyBridge chips
Peter Zijlstra [Tue, 15 Nov 2011 09:51:15 +0000 (10:51 +0100)]
perf, x86: Disable PEBS on SandyBridge chips

Cc: Stephane Eranian <eranian@google.com>
Cc: stable@kernel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoASoC: Make SND_SOC_MX27VIS_AIC32X4 depend on I2C
Axel Lin [Sun, 4 Dec 2011 08:11:16 +0000 (16:11 +0800)]
ASoC: Make SND_SOC_MX27VIS_AIC32X4 depend on I2C

SND_SOC_MX27VIS_AIC32X4 selects SND_SOC_TLV320AIC32X4,
but SND_SOC_TLV320AIC32X4 needs CONFIG_I2C.
So we need to make SND_SOC_MX27VIS_AIC32X4 depend on I2C.
otherwise I got below build error if CONFIG_I2C is not selected.

  CC      sound/soc/codecs/tlv320aic32x4.o
sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_read':
sound/soc/codecs/tlv320aic32x4.c:323: error: implicit declaration of function 'i2c_smbus_read_byte_data'
sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_probe':
sound/soc/codecs/tlv320aic32x4.c:641: error: 'i2c_master_send' undeclared (first use in this function)
sound/soc/codecs/tlv320aic32x4.c:641: error: (Each undeclared identifier is reported only once
sound/soc/codecs/tlv320aic32x4.c:641: error: for each function it appears in.)
sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_modinit':
sound/soc/codecs/tlv320aic32x4.c:763: error: implicit declaration of function 'i2c_add_driver'
sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_exit':
sound/soc/codecs/tlv320aic32x4.c:774: error: implicit declaration of function 'i2c_del_driver'
make[3]: *** [sound/soc/codecs/tlv320aic32x4.o] Error 1
make[2]: *** [sound/soc/codecs] Error 2
make[1]: *** [sound/soc] Error 2
make: *** [sound] Error 2

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>