pandora-kernel.git
14 years agoMerge branches 'bkl-removal', 'cma', 'ehca', 'for-2.6.27', 'mlx4', 'mthca' and 'nes...
Roland Dreier [Thu, 24 Jul 2008 15:38:47 +0000 (08:38 -0700)]
Merge branches 'bkl-removal', 'cma', 'ehca', 'for-2.6.27', 'mlx4', 'mthca' and 'nes' into for-linus

14 years agoMAINTAINERS: Remove Glenn Streiff from NetEffect entry
Roland Dreier [Wed, 23 Jul 2008 21:20:12 +0000 (14:20 -0700)]
MAINTAINERS: Remove Glenn Streiff from NetEffect entry

Glenn is no longer at NetEffect.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agomlx4_core: Improve error message when not enough UAR pages are available
Roland Dreier [Wed, 23 Jul 2008 15:12:47 +0000 (08:12 -0700)]
mlx4_core: Improve error message when not enough UAR pages are available

If an mlx4 device with default FW (which gives a UAR BAR size of 8 MB)
is used in a system with 64 KB pages, then there are only 8192/64==128
UAR pages available.  However, the first 128 UAR pages are reserved
for use with event queue doorbells, so no UAR pages are available to
do anything else with, which means that the driver cannot work.

The current driver fails with a fairly cryptic "Failed to allocate
driver access region, aborting" message in this situation.  Fix the
driver to detect the problem earlier and print out a clearer
description of the problem and a suggestion of how to fix it (use a
new firmware image).

Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/mlx4: Add support for memory management extensions and local DMA L_Key
Roland Dreier [Wed, 23 Jul 2008 15:12:26 +0000 (08:12 -0700)]
IB/mlx4: Add support for memory management extensions and local DMA L_Key

Add support for the following operations to mlx4 when device firmware
supports them:

 - Send with invalidate and local invalidate send queue work requests;
 - Allocate/free fast register MRs;
 - Allocate/free fast register MR page lists;
 - Fast register MR send queue work requests;
 - Local DMA L_Key.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/mthca: Keep free count for MTT buddy allocator
Roland Dreier [Tue, 22 Jul 2008 21:20:05 +0000 (14:20 -0700)]
IB/mthca: Keep free count for MTT buddy allocator

MTT entries are allocated with a buddy allocator, which just keeps
bitmaps for each level of the buddy table.  However, all free space
starts out at the highest order, and small allocations start scanning
from the lowest order.  When the lowest order tables have no free
space, this can lead to scanning potentially millions of bits before
finding a free entry at a higher order.

We can avoid this by just keeping a count of how many free entries
each order has, and skipping the bitmap scan when an order is
completely empty.  This provides a nice performance boost for a
negligible increase in memory usage.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agomlx4_core: Keep free count for MTT buddy allocator
Roland Dreier [Tue, 22 Jul 2008 21:19:40 +0000 (14:19 -0700)]
mlx4_core: Keep free count for MTT buddy allocator

MTT entries are allocated with a buddy allocator, which just keeps
bitmaps for each level of the buddy table.  However, all free space
starts out at the highest order, and small allocations start scanning
from the lowest order.  When the lowest order tables have no free
space, this can lead to scanning potentially millions of bits before
finding a free entry at a higher order.

We can avoid this by just keeping a count of how many free entries
each order has, and skipping the bitmap scan when an order is
completely empty.  This provides a nice performance boost for a
negligible increase in memory usage.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agomlx4_code: Add missing FW status return code
Jack Morgenstein [Tue, 22 Jul 2008 21:19:39 +0000 (14:19 -0700)]
mlx4_code: Add missing FW status return code

Add ICM_ERROR firmware status code.  In mapping to errnos, -ENFILE
seems closest.

This is in preparation for providing more detailed log info using
mlx4_err() in low-level driver when a non-zero status is returned.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/mlx4: Rename struct mlx4_lso_seg to mlx4_wqe_lso_seg
Roland Dreier [Tue, 22 Jul 2008 21:19:39 +0000 (14:19 -0700)]
IB/mlx4: Rename struct mlx4_lso_seg to mlx4_wqe_lso_seg

Make the struct name consistent with other WQE segment struct types
defined in <linux/mlx4/qp.h>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agomlx4_core: Add module parameter to enable QoS support
Jack Morgenstein [Tue, 22 Jul 2008 21:19:37 +0000 (14:19 -0700)]
mlx4_core: Add module parameter to enable QoS support

Add a module parameter "enable_qos" to mlx4_core.  If this param is
set, enable support for QoS in the INIT_HCA command.  By default, the
parameter is set to 0 (disabled).

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoRDMA/iwcm: Remove IB_ACCESS_LOCAL_WRITE from remote QP attributes
Dotan Barak [Tue, 22 Jul 2008 21:18:34 +0000 (14:18 -0700)]
RDMA/iwcm: Remove IB_ACCESS_LOCAL_WRITE from remote QP attributes

Remove IB_ACCESS_LOCAL_WRITE from qp.qp_access_flags because this
attribute is only used to set remote permissions.

Signed-off-by: Dotan Barak <dotanba@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIPoIB: Include err code in trace message for ib_sa_path_rec_get() failures
Or Gerlitz [Tue, 22 Jul 2008 21:18:34 +0000 (14:18 -0700)]
IPoIB: Include err code in trace message for ib_sa_path_rec_get() failures

Print the return code of ib_sa_path_rec_get() if it fails to help
debug errors.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/sa_query: Check if sm_ah is NULL in ib_sa_remove_one()
Ralph Campbell [Tue, 22 Jul 2008 21:18:33 +0000 (14:18 -0700)]
IB/sa_query: Check if sm_ah is NULL in ib_sa_remove_one()

If update_sm_ah() fails, it leaves the port's sm_ah as NULL.  Then if
the device or module is removed, ib_sa_remove_one() will dereference a
NULL pointer when it calls kref_put().  Fix this by testing if sm_ah
is NULL before dropping the reference.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/ehca: Release mutex in error path of alloc_small_queue_page()
Julia Lawall [Tue, 22 Jul 2008 21:18:10 +0000 (14:18 -0700)]
IB/ehca: Release mutex in error path of alloc_small_queue_page()

The pd->lock mutex is released on a successful return, so it should be
released on an error return as well.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
expression l;
@@

mutex_lock(l);
... when != mutex_unlock(l)
    when any
    when strict
(
if (...) { ... when != mutex_unlock(l)
+   mutex_unlock(l);
    return ...;
}
|
mutex_unlock(l);
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/ehca: Use default value for Local CA ACK Delay if FW returns 0
Joachim Fenkes [Tue, 22 Jul 2008 21:18:08 +0000 (14:18 -0700)]
IB/ehca: Use default value for Local CA ACK Delay if FW returns 0

Some firmware versions report a Local CA ACK Delay of 0.  In that
case, return a more sensible default value of 12 (-> 16 msec) instead.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/ehca: Filter PATH_MIG events if QP was never armed
Joachim Fenkes [Tue, 22 Jul 2008 21:18:07 +0000 (14:18 -0700)]
IB/ehca: Filter PATH_MIG events if QP was never armed

Certain firmware versions sometimes cause spurious PATH_MIG events to
occur during QP creation.  Filter these events by making sure PATH_MIG
events are only handed down when they actually make sense (i.e. when
the QP has been armed at least once).

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoIB/iser: Add support for RDMA_CM_EVENT_ADDR_CHANGE event
Or Gerlitz [Tue, 22 Jul 2008 21:16:21 +0000 (14:16 -0700)]
IB/iser: Add support for RDMA_CM_EVENT_ADDR_CHANGE event

Enhance iser to act upon notification on network stack changes that
make its RDMA connection unaligned with the link used by the stack for
the <src,dst> IPs used to establish the connection.

When RDMA_CM_EVENT_ADDR_CHANGE arrives, just disconnect the
connection, assuming that the user space iscsid daemon will reconnect,
and the new connection will be aligned with the IP stack.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoRDMA/cma: Add RDMA_CM_EVENT_TIMEWAIT_EXIT event
Amir Vadai [Tue, 22 Jul 2008 21:14:23 +0000 (14:14 -0700)]
RDMA/cma: Add RDMA_CM_EVENT_TIMEWAIT_EXIT event

Consumers that want to re-use their QPs in new connections need to
know when the QP has exited the timewait state.  Report the timewait
event through the rdma_cm.

Signed-off-by: Amir Vadai <amirv@mellanox.co.il>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agoRDMA/cma: Add RDMA_CM_EVENT_ADDR_CHANGE event
Or Gerlitz [Tue, 22 Jul 2008 21:14:22 +0000 (14:14 -0700)]
RDMA/cma: Add RDMA_CM_EVENT_ADDR_CHANGE event

Add an RDMA_CM_EVENT_ADDR_CHANGE event can be used by rdma-cm
consumers that wish to have their RDMA sessions always use the same
links (eg <hca/port>) as the IP stack does.  In the current code, this
does not happen when bonding is used and fail-over happened but the IB
link used by an already existing session is operating fine.

Use the netevent notification for sensing that a change has happened
in the IP stack, then scan the rdma-cm ID list to see if there is an
ID that is "misaligned" with respect to the IP stack, and deliver
RDMA_CM_EVENT_ADDR_CHANGE for this ID.  The consumer can act on the
event or just ignore it.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
14 years agomarkers: fix duplicate modpost entry
Mathieu Desnoyers [Mon, 21 Jul 2008 21:21:38 +0000 (14:21 -0700)]
markers: fix duplicate modpost entry

When a kernel was rebuilt, the previous Module.markers was not cleared.
It caused markers with different format strings to appear as duplicates
when a markers was changed.  This problem is present since
scripts/mod/modpost.c started to generate Module.markers, commit
b2e3e658b344c6bcfb8fb694100ab2f2b5b2edb0

It therefore applies to 2.6.25, 2.6.26 and linux-next.

I merely merged the patches from Roland, Wenji and Takashi here.

Credits to
Roland McGrath <roland@redhat.com>
Wenji Huang <wenji.huang@oracle.com>
and
Takashi Nishiie <t-nishiie@np.css.fujitsu.com>

for providing the individual fixes.

- Changelog :
  - Integrated Takashi's Makefile modification to clear Module.markers upon
    make clean.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Roland McGrath <roland@redhat.com>
Cc: Wenji Huang <wenji.huang@oracle.com>
Cc: Takashi Nishiie <t-nishiie@np.css.fujitsu.com>
Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoFix build on COMPAT platforms when CONFIG_EPOLL is disabled
Atsushi Nemoto [Mon, 21 Jul 2008 21:21:37 +0000 (14:21 -0700)]
Fix build on COMPAT platforms when CONFIG_EPOLL is disabled

Add missing cond_syscall() entry for compat_sys_epoll_pwait.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agotpm: MAINTAINERS whitespace fix and email addresses addition
Rajiv Andrade [Mon, 21 Jul 2008 21:21:37 +0000 (14:21 -0700)]
tpm: MAINTAINERS whitespace fix and email addresses addition

Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoproc: fix /proc/*/pagemap some more
Alexey Dobriyan [Mon, 21 Jul 2008 21:21:36 +0000 (14:21 -0700)]
proc: fix /proc/*/pagemap some more

struct pagemap_walk was placed on stack, some hooks are initialized, the
rest (->pgd_entry, ->pud_entry, ->pte_entry) are valid but junk.

Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Vegard Nossum" <vegard.nossum@gmail.com>
Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agocpusets: fix wrong domain attr updates
Miao Xie [Mon, 21 Jul 2008 21:21:35 +0000 (14:21 -0700)]
cpusets: fix wrong domain attr updates

Fix wrong domain attr updates, or we will always update the first sched
domain attr.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org> [2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agogpio: pcf857x: add lock and handle more chips
David Brownell [Mon, 21 Jul 2008 21:21:34 +0000 (14:21 -0700)]
gpio: pcf857x: add lock and handle more chips

Two small updates to the pcf857x driver: (a) the max732[89] chips are
also second sources for the pcf8574/a, and (b) add a mutex to prevent
trashing the cached state.  Adding the lock is effectively a bugfix,
although it seems unlikely that anyone would have run into the issue it
protects against.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agogpio: gpio driver for max7301 SPI GPIO expander
Juergen Beisert [Mon, 21 Jul 2008 21:21:34 +0000 (14:21 -0700)]
gpio: gpio driver for max7301 SPI GPIO expander

Maxim's MAX7301 is an SPI GPIO expander with 28 GPIOs.  Note: MAX7301's
interrupt feature is not supported yet.

[akpm@linux-foundation.org: coding-style fixes]
[g.liakhovetski@pengutronix.de: Fix inaccuracies in comments, check spi_setup()
return code, mask off high byte in max7301_read()]
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoexecve filename: document and export via auxiliary vector
John Reiser [Mon, 21 Jul 2008 21:21:32 +0000 (14:21 -0700)]
execve filename: document and export via auxiliary vector

The Linux kernel puts the filename argument of execve() into the new
address space.  Many developers are surprised to learn this.  Those who
know and could use it, object "But it's not documented."

Those who want to use it dislike the expression
  (char *)(1+ strlen(env[-1+ n_env]) + env[-1+ n_env])
because it requires locating the last original environment variable,
and assumes that the filename follows the characters.

This patch documents the insertion of the filename, and makes it easier
to find by adding a new tag AT_EXECFN in the ElfXX_auxv_t; see <elf.h>.

In many cases readlink("/proc/self/exe",) gives the same answer.  But if
all the original pages get unmapped, then the kernel erases the symlink
for /proc/self/exe.  This can happen when a program decompressor does a
good job of cleaning up after uncompressing directly to memory, so that
the address space of the target program looks the same as if compression
had never happened.  One example is http://upx.sourceforge.net .

One notable use of the underlying concept (what path containED the
executable) is glibc expanding $ORIGIN in DT_RUNPATH.  In practice for
the near term, it may be a good idea for user-mode code to use both
/proc/self/exe and AT_EXECFN as fall-back methods for each other.
/proc/self/exe can fail due to unmapping, AT_EXECFN can fail because it
won't be present on non-new systems.  The auxvec or {AT_EXECFN}.d_val
also can get overwritten, although in nearly all cases this would be the
result of a bug.

The runtime cost is one NEW_AUX_ENT using two words of stack space.  The
underlying value is maintained already as bprm->exec; setup_arg_pages()
in fs/exec.c slides it for stack_shift, etc.

Signed-off-by: John Reiser <jreiser@BitWagon.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
Linus Torvalds [Mon, 21 Jul 2008 22:42:20 +0000 (15:42 -0700)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (100 commits)
  usb-storage: revert DMA-alignment change for Wireless USB
  USB: use reset_resume when normal resume fails
  usb_gadget: composite cdc gadget fault handling
  usb gadget: minor USBCV fix for composite framework
  USB: Fix bug with byte order in isp116x-hcd.c fio write/read
  USB: fix double kfree in ipaq in error case
  USB: fix build error in cdc-acm for CONFIG_PM=n
  USB: remove board-specific UP2OCR configuration from pxa27x-udc
  USB: EHCI: Reconciling USB register differences on MPC85xx vs MPC83xx
  USB: Fix pointer/int cast in USB devio code
  usb gadget: g_cdc dependso on NET
  USB: Au1xxx-usb: suspend/resume support.
  USB: Au1xxx-usb: clean up ohci/ehci bus glue sources.
  usbfs: don't store bad pointers in registration
  usbfs: fix race between open and unregister
  usbfs: simplify the lookup-by-minor routines
  usbfs: send disconnect signals when device is unregistered
  USB: Force unbinding of drivers lacking reset_resume or other methods
  USB: ohci-pnx4008: I2C cleanups and fixes
  USB: debug port converter does not accept more than 8 byte packets
  ...

14 years agousb-storage: revert DMA-alignment change for Wireless USB
Alan Stern [Mon, 30 Jun 2008 17:39:59 +0000 (13:39 -0400)]
usb-storage: revert DMA-alignment change for Wireless USB

This patch (as1110) reverts an earlier patch meant to help with
Wireless USB host controllers.  These controllers can have bulk
maxpacket values larger than 512, which puts unusual constraints on
the sizes of scatter-gather list elements.  However it turns out that
the block layer does not provide the support we need to enforce these
constraints; merely changing the DMA alignment mask doesn't help.
Hence there's no reason to keep the original patch.  The Wireless USB
problem will have to be solved a different way.

In addition, there is a reason to get rid of the earlier patch.  By
dereferencing a pointer stored in the ep_in array of struct
usb_device, the current code risks an invalid memory access when it
runs concurrently with device removal.  The members of that array are
cleared before the driver's disconnect method is called, so it should
not try to use them.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: use reset_resume when normal resume fails
Alan Stern [Mon, 30 Jun 2008 15:14:43 +0000 (11:14 -0400)]
USB: use reset_resume when normal resume fails

This patch (as1109b) makes USB-Persist more resilient to errors.  With
the current code, if a normal resume fails, it's an unrecoverable
error.  With the patch, if a normal resume fails (and if the device is
enabled for USB-Persist) then a reset-resume is tried.

This fixes the problem reported in Bugzilla #10977.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb_gadget: composite cdc gadget fault handling
David Brownell [Tue, 1 Jul 2008 20:18:20 +0000 (13:18 -0700)]
usb_gadget: composite cdc gadget fault handling

These two fixes ensure the new "CDC Composite Device" gadget
fails cleanly when it's loaded on hardware that can't support
this particular gadget driver.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget: minor USBCV fix for composite framework
David Lopo [Tue, 1 Jul 2008 20:14:17 +0000 (13:14 -0700)]
usb gadget: minor USBCV fix for composite framework

Fill in a reserved/unused device qualifier field to ensure that
the USBCV tests will always pass.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: Fix bug with byte order in isp116x-hcd.c fio write/read
Julien May [Fri, 27 Jun 2008 13:01:18 +0000 (15:01 +0200)]
USB: Fix bug with byte order in isp116x-hcd.c fio write/read

URB payload data are transfered in wrong byte order on a big endinan
architecture (AVR32).

Signed-off-by: Julien May <mailinglist@miromico.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix double kfree in ipaq in error case
Oliver Neukum [Mon, 30 Jun 2008 12:33:57 +0000 (14:33 +0200)]
USB: fix double kfree in ipaq in error case

in the error case the ipaq driver leaves a dangling pointer to already
freed memory that will be freed again.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix build error in cdc-acm for CONFIG_PM=n
Oliver Neukum [Tue, 1 Jul 2008 17:10:08 +0000 (19:10 +0200)]
USB: fix build error in cdc-acm for CONFIG_PM=n

Here's the fix. cdc-wdm has the same problem. The fix is the same.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: remove board-specific UP2OCR configuration from pxa27x-udc
Daniel Ribeiro [Wed, 2 Jul 2008 02:09:27 +0000 (23:09 -0300)]
USB: remove board-specific UP2OCR configuration from pxa27x-udc

Remove the board-specific UP2OCR configuration from the
pxa27x-udc driver.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: EHCI: Reconciling USB register differences on MPC85xx vs MPC83xx
Srikanth Srinivasan [Wed, 2 Jul 2008 07:14:33 +0000 (02:14 -0500)]
USB: EHCI: Reconciling USB register differences on MPC85xx vs MPC83xx

A couple of USB register initializations had to be changed on MPC85xx
platforms.  This is due to the internal SoC buses being different on
MPC83xx SoCs vs MPC85xx SoCs.

We currently handle this via an ifdef since 83xx and 85xx are mutually
exclusive kernel builds.

Signed-off-by: Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: Fix pointer/int cast in USB devio code
David Howells [Wed, 2 Jul 2008 11:28:55 +0000 (12:28 +0100)]
USB: Fix pointer/int cast in USB devio code

Fix pointer/int cast in USB devio code, and thus avoid a compiler warning.

A void* data argument passed to bus_find_device() and thence to match_devt()
is used to carry a 32-bit datum.  However, casting directly between a u32 and
a pointer is not permitted - there must be an intermediate cast via (unsigned)
long.

This was introduced by the following patch:

commit 94b1c9fa060ece2c8f080583beb6cc6008e41413
Author: Alan Stern <stern@rowland.harvard.edu>
Date:   Tue Jun 24 14:47:12 2008 -0400

    usbfs: simplify the lookup-by-minor routines

    This patch (as1105) simplifies the lookup-by-minor-number code in
    usbfs.  Instead of passing the minor number to the callback, which
    must then reconstruct the entire dev_t value, the patch passes the
    dev_t value directly.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget: g_cdc dependso on NET
Randy Dunlap [Thu, 3 Jul 2008 21:44:59 +0000 (14:44 -0700)]
usb gadget: g_cdc dependso on NET

g_cdc needs to depend on NET, otherwise net-related build errors happen:

ERROR: "netif_carrier_on" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "netif_carrier_off" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "netif_rx" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "alloc_etherdev_mq" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "free_netdev" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "register_netdev" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "print_mac" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "dev_kfree_skb_any" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "__alloc_skb" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "eth_type_trans" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "unregister_netdev" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "__netif_schedule" [drivers/usb/gadget/g_cdc.ko] undefined!
ERROR: "skb_put" [drivers/usb/gadget/g_cdc.ko] undefined!

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: Au1xxx-usb: suspend/resume support.
Manuel Lauss [Mon, 23 Jun 2008 07:09:37 +0000 (09:09 +0200)]
USB: Au1xxx-usb: suspend/resume support.

Copy the OHCI/EHCI PM callbacks of the PCI implementation since
they work equally well on Au1xxx hardware.

Tested on Au1200.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: Au1xxx-usb: clean up ohci/ehci bus glue sources.
Manuel Lauss [Mon, 23 Jun 2008 07:08:29 +0000 (09:08 +0200)]
USB: Au1xxx-usb: clean up ohci/ehci bus glue sources.

- Fold multiple probe/remove callbacks into one function;
- minor style fixes, no functional changes.

Tested on Au1200.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousbfs: don't store bad pointers in registration
Alan Stern [Tue, 24 Jun 2008 18:47:29 +0000 (14:47 -0400)]
usbfs: don't store bad pointers in registration

This patch (as1107) fixes a small bug in the usbfs registration and
unregistration code.  It avoids leaving an error value stored in the
device's usb_classdev field and it avoids trying to unregister a NULL
pointer.  (It also fixes a rather extreme overuse of whitespace.)

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousbfs: fix race between open and unregister
Alan Stern [Tue, 24 Jun 2008 18:47:19 +0000 (14:47 -0400)]
usbfs: fix race between open and unregister

This patch (as1106) fixes a race between opening and unregistering
device files in usbfs.  The current code drops its reference to the
device and then reacquires it, ignoring the possibility that the
device structure might have been removed in the meantime.  It also
doesn't check whether the device is already in the NOTATTACHED state
when the file is opened.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousbfs: simplify the lookup-by-minor routines
Alan Stern [Tue, 24 Jun 2008 18:47:12 +0000 (14:47 -0400)]
usbfs: simplify the lookup-by-minor routines

This patch (as1105) simplifies the lookup-by-minor-number code in
usbfs.  Instead of passing the minor number to the callback, which
must then reconstruct the entire dev_t value, the patch passes the
dev_t value directly.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousbfs: send disconnect signals when device is unregistered
Alan Stern [Tue, 24 Jun 2008 18:47:04 +0000 (14:47 -0400)]
usbfs: send disconnect signals when device is unregistered

USB device files are accessible in two ways: as files in usbfs and as
character device nodes.  The two paths are supposed to behave
identically, but they don't.  When the underlying USB device is
unplugged, disconnect signals are sent to processes with open usbfs
files (if they requested these signals) but not to processes with open
device node files.

This patch (as1104) fixes the bug by moving the disconnect-signalling
code into a common subroutine which is called from both paths.
Putting this subroutine in devio.c removes the only out-of-file
reference to struct dev_state, and so the structure's declaration can
be moved from usb.h into devio.c.

Finally, the new subroutine performs one extra action: It kills all
the outstanding async URBs.  (I'd kill the outstanding synchronous
URBs too, if there was any way to do it.)  In the past this hasn't
mattered much, because devices were unregistered from usbfs only
when they were disconnected.  But now the unregistration can also
occur whenever devices are unbound from the usb_generic driver.  At
any rate, killing URBs when a device is unregistered from usbfs seems
like a good thing to do.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: Force unbinding of drivers lacking reset_resume or other methods
Alan Stern [Mon, 23 Jun 2008 20:00:40 +0000 (16:00 -0400)]
USB: Force unbinding of drivers lacking reset_resume or other methods

This patch (as1024) takes care of a FIXME issue: Drivers that don't
have the necessary suspend, resume, reset_resume, pre_reset, or
post_reset methods will be unbound and their interface reprobed when
one of the unsupported events occurs.

This is made slightly more difficult by the fact that bind operations
won't work during a system sleep transition.  So instead the code has
to defer the operation until the transition ends.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ohci-pnx4008: I2C cleanups and fixes
Jean Delvare [Wed, 18 Jun 2008 12:46:27 +0000 (14:46 +0200)]
USB: ohci-pnx4008: I2C cleanups and fixes

Various cleanups and fixes to the i2c code in ohci-pnx4008:
* Delete empty isp1301_command. The i2c driver command implementation
  is optional, so there's no point in providing an empty
  implementation.
* Give a name to isp1301_driver. I'm surprised that i2c-core accepted
  to register this driver at all. I've chosen "isp1301_pnx" as the
  name, because it's not a generic ISP1301 driver (much like the
  isp1301_omap driver.) We might want to make the name even more
  specific (but "isp1301_ohci_pnx4008" doesn't fit.)
* The ISP1301 is definitely not a hardware monitoring device.
* Fix a memory leak on failure in isp1301_attach. If
  i2c_attach_client fails, the client is not registered so
  isp1301_detach is never called and the i2c_client memory is lost.
* Use strlcpy instead of strcpy.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: debug port converter does not accept more than 8 byte packets
Aleksey Gorelov [Thu, 19 Jun 2008 22:22:17 +0000 (15:22 -0700)]
USB: debug port converter does not accept more than 8 byte packets

USB debug port only supports 8 byte rx/tx packets. Although spec implies that
"if a packet larger than eight bytes is received from the remote computer, the
device must break the larger packet into eight-byte packets before sending the
data to the Debug Port", the real PLX NET20DC device does not handle it right -
data is corrupted on debug port end if serial interface sends >8 byte urbs.
Patch below fixes the issue by limiting tx urb to 8 byte.

Signed off by: Aleks Gorelov <dared1st@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix disconnect bug in cdc-acm
Oliver Neukum [Wed, 25 Jun 2008 12:17:16 +0000 (14:17 +0200)]
USB: fix disconnect bug in cdc-acm

cdc-acm must give up secondary interfaces if the primary is disconnected
and vice versa. This wasn't done correctly.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix usb serial pm counter decrement for disconnected interfaces
Oliver Neukum [Wed, 25 Jun 2008 11:32:49 +0000 (13:32 +0200)]
USB: fix usb serial pm counter decrement for disconnected interfaces

usb serial decrements the pm counter even if an interface has been
disconnected. If it was a logical disconnect the interface may belong
already to another driver. This patch introduces a check for disconnected
interfaces.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: Stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: autosuspend for cdc-wdm
Oliver Neukum [Tue, 24 Jun 2008 13:56:10 +0000 (15:56 +0200)]
USB: autosuspend for cdc-wdm

this patch implements

- suspend/resume
- aggressive autosuspend for the cdc-wdm driver
- pre/post_reset

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: additional power savings for cdc-acm devices that support remote wakeup
Oliver Neukum [Fri, 20 Jun 2008 09:25:57 +0000 (11:25 +0200)]
USB: additional power savings for cdc-acm devices that support remote wakeup

this patch saves power for cdc-acm devices that support remote wakeup
while the device is connected.

- request needs_remote_wakeup when needed
- delayed write while a device is autoresumed
- the device is marked busy when appropriate

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: keyspan: Remove duplicate device entries
Ben Collins [Fri, 27 Jun 2008 00:08:16 +0000 (20:08 -0400)]
USB: keyspan: Remove duplicate device entries

The 28xb, as documented in comments, has the same ID's as the 28x.
Remove the duplicated ID's from the device tables, and expand the
comment to document this.

Signed-off-by: Ben Collins <ben.collins@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: fix uninitialized variable warning in keyspan_pda
Benny Halevy [Fri, 27 Jun 2008 09:22:32 +0000 (12:22 +0300)]
usb: fix uninitialized variable warning in keyspan_pda

This fixes the compiler warning.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: r8a66597-hcd: fix iinterval for Full/Low speed device
Yoshihiro Shimoda [Fri, 27 Jun 2008 10:09:58 +0000 (19:09 +0900)]
usb: r8a66597-hcd: fix iinterval for Full/Low speed device

fix interrupt transfer interval for Full/Low speed device.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: r8a66597-hcd: fix interrupt trigger
Yoshihiro Shimoda [Fri, 27 Jun 2008 10:09:55 +0000 (19:09 +0900)]
usb: r8a66597-hcd: fix interrupt trigger

fix the problem that did not set IRQF_TRIGGER_ flag.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix usb_reset_device and usb_reset_composite_device(take 3)
Ming Lei [Wed, 18 Jun 2008 14:00:29 +0000 (22:00 +0800)]
USB: fix usb_reset_device and usb_reset_composite_device(take 3)

This patch renames the existing usb_reset_device in hub.c to
usb_reset_and_verify_device and renames the existing
usb_reset_composite_device to usb_reset_device. Also the new
usb_reset_and_verify_device does't need to be EXPORTED .

The idea of the patch is that external interface driver
should warn the other interfaces' driver of the same
device before and after reseting the usb device. One interface
driver shoud call _old_ usb_reset_composite_device instead of
_old_ usb_reset_device since it can't assume the device contains
only one interface. The _old_ usb_reset_composite_device
is safe for single interface device also. we rename the two
functions to make the change easily.

This patch is under guideline from Alan Stern.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
14 years agoUSB: usb-serial: fix a sparse warning about different signedness
Andre Haupt [Wed, 18 Jun 2008 13:56:00 +0000 (15:56 +0200)]
USB: usb-serial: fix a sparse warning about different signedness

fix the following sparse warning:

drivers/usb/serial/usb-serial.c:927:43: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/usb-serial.c:927:43:    expected unsigned int *minor
drivers/usb/serial/usb-serial.c:927:43:    got int *<noident>
  CHECK   drivers/usb/serial/generic.c

Signed-off-by: Andre Haupt <andre@bitwigglers.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: isp1760: Support board-specific hardware configurations
Nate Case [Tue, 17 Jun 2008 16:11:38 +0000 (11:11 -0500)]
USB: isp1760: Support board-specific hardware configurations

This adds support for hardware configurations that don't match the
chip default register settings (e.g., 16-bit data bus, DACK and
DREQ pulled up instead of down, analog overcurrent mode).

These settings are passed in via the OF device tree.  The PCI
interface still assumes the same default values.

Signed-off-by: Nate Case <ncase@xes-inc.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: fix comment of usb_set_configuration
Ming Lei [Tue, 17 Jun 2008 15:24:08 +0000 (23:24 +0800)]
USB: fix comment of usb_set_configuration

It is the usb interface driver probe() methods that
can't call usb_set_configuration, not usb device driver.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: use standard SG iterator in the scatter-gather library
Alan Stern [Mon, 16 Jun 2008 16:11:39 +0000 (12:11 -0400)]
USB: use standard SG iterator in the scatter-gather library

This patch (as1103) changes the iteration in the USB scatter-gather to
use a standard SG iterator.  Otherwise the iteration will fail if it
encounters a chained SG list.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: remove interface parameter of usb_reset_composite_device
Ming Lei [Sun, 15 Jun 2008 01:42:02 +0000 (09:42 +0800)]
USB: remove interface parameter of usb_reset_composite_device

From the current implementation of usb_reset_composite_device
function, the iface parameter is no longer useful. This function
doesn't do something special for the iface usb_interface,compared
with other interfaces in the usb_device. So remove the parameter
and fix the related caller.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: AccessRunner: avoid unnecessary memset
Christophe Jaillet [Mon, 9 Jun 2008 23:39:53 +0000 (16:39 -0700)]
USB: AccessRunner: avoid unnecessary memset

Remove an explicit memset(.., 0, ...) to a variable allocated with kzalloc
(i.e.  'card_info' array of the structure 'instance').

Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: drivers/usb/host/isp1760-hcd.c: processor flags have type `unsigned long'
Andrew Morton [Mon, 9 Jun 2008 23:39:52 +0000 (16:39 -0700)]
USB: drivers/usb/host/isp1760-hcd.c: processor flags have type `unsigned long'

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: cdc-wdm cleanup
Oliver Neukum [Thu, 19 Jun 2008 12:20:18 +0000 (14:20 +0200)]
USB: cdc-wdm cleanup

- fixes an error with filling out control requests
- increases grepability and error logging
- fixes the short read code path

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: delete airprime driver
Greg Kroah-Hartman [Thu, 19 Jun 2008 18:21:16 +0000 (11:21 -0700)]
USB: delete airprime driver

This driver is only for one device id, and the option driver should be
used instead for it.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: usbmon: use simple_read_from_buffer()
Akinobu Mita [Mon, 9 Jun 2008 23:39:57 +0000 (16:39 -0700)]
USB: usbmon: use simple_read_from_buffer()

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: uhci: mark root_hub_hub_des[] as const
Ming Lei [Sun, 8 Jun 2008 08:44:40 +0000 (16:44 +0800)]
USB: uhci: mark root_hub_hub_des[] as const

mark this array as const because it is read-only

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: host: mark const variable tables as "const"
Ming Lei [Sun, 8 Jun 2008 08:13:03 +0000 (16:13 +0800)]
USB: host: mark const variable tables as "const"

Mark the tables as const so that they end up in .rodata
section and don't cacheline share with things that get
written to.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB Gadget: documentation update
Alan Stern [Mon, 2 Jun 2008 20:26:48 +0000 (16:26 -0400)]
USB Gadget: documentation update

This patch (as1102) clarifies two points in the USB Gadget kerneldoc:

Request completion callbacks are always made with interrupts
disabled;

Device controllers may not support STALLing the status stage
of a control transfer after the data stage is over.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: irda: cleanup on ir-usb module
Felipe Balbi [Tue, 3 Jun 2008 11:47:52 +0000 (14:47 +0300)]
usb: irda: cleanup on ir-usb module

General cleanup on ir-usb module. Introduced
a common header that could be used also on
usb gadget framework.

Lot's of cleanups and now using macros from the header
file.

Signed-off-by: Felipe Balbi <me@felipebalbi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ehci-hcd unlink speedups
David Brownell [Wed, 4 Jun 2008 05:21:55 +0000 (22:21 -0700)]
USB: ehci-hcd unlink speedups

This patch fixes some performance bugs observed with some workloads
when unlinking EHCI queue header (QH) descriptors from the async ring
(control/bulk schedule).

The mechanism intended to defer unlinking an empty QH (so there is no
penalty in common cases where it's quickly reused) was not working as
intended.  Sometimes the unlink was scheduled:

 - too quickly ... which can be a *strong* negative effect, since
   that QH becomes unavailable for immediate re-use;

 - too slowly ... wasting DMA cycles, usually a minor issue except
   for increased bus contention and power usage;

Plus there was an extreme case of "too slowly":  a logical error in the
IAA watchdog-timer conversion meant that sometimes the unlink never
got scheduled.

The fix replaces a simple counter with a timestamp derived from the
controller's 8 KHz microframe counter, and adjusts the timer usage
for some issues associated with HZ being less than 8K.

(Based on a patch originally by Alan Stern, and good troubleshooting
from  Leonid.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Leonid <leonidv11@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: hub: add check for unsupported bus topology
Felipe Balbi [Thu, 12 Jun 2008 07:49:47 +0000 (10:49 +0300)]
usb: hub: add check for unsupported bus topology

We can't allow hubs on the 7th tier as they would allow
devices on the 8th tier.

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ohci_hcd hang: submit vs. rmmod race
Pete Zaitcev [Mon, 2 Jun 2008 04:23:07 +0000 (21:23 -0700)]
USB: ohci_hcd hang: submit vs. rmmod race

If we do rmmod ohci_hcd while an application is doing something, the
following may happen:

- a control URB completes (in finish_urb) and the ohci's endpoint is
  set into ED_UNLINK in ed_deschedule
- same URB is (re)submitted because of the open/close loop or other
  such application behaviour
- rmmod sets the state to HC_STATE_QUESCING
- finish_unlinks happens at next SOF; normally it would set ed into
  ED_IDLE and immediately call ed_schedule (since URB had extra TDs
  queued), which sets it into ED_OPER. But the check in ed_schedule
  makes it fail with -EAGAIN (which is ignored)
- from now on we have a dead URB stuck; it cannot even be unlinked
  because the ed status is not ED_OPER, and thus start_ed_unlink is
  not invoked.

This patch removes the check. In 2.6.25, all callers check for
__ACTIVE bit before invoking ed_schedule, which is more appropriate.

Alan Stern and David Brownell approved of this (cautiously).

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: make SA1111 OHCI driver SA11x0 specific
Eric Miao [Mon, 2 Jun 2008 02:05:30 +0000 (10:05 +0800)]
USB: make SA1111 OHCI driver SA11x0 specific

As RMK pointed out,  considering the fact that the _only_ platform with
a PXA and SA1111 is the Lubbock, and that SA1111 DMA doesn't work there,
(i.e. the SA1111 OHCI doesn't work there) the SA1111 OHCI driver should
really be made SA11x0 specific.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: missing usb_put_hcd to ohci-at91
Pete Zaitcev [Sun, 1 Jun 2008 21:38:43 +0000 (14:38 -0700)]
USB: missing usb_put_hcd to ohci-at91

Looks like usb_put_hcd was missing. Also, make an always-zero function
return void.

Signed-off-by: Pete Zaitcev <zaitcev@yahoo.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: speedtch.c fix sparse shadowed variable warning
Harvey Harrison [Fri, 30 May 2008 17:39:04 +0000 (10:39 -0700)]
USB: speedtch.c fix sparse shadowed variable warning

i is used only as a for-loop index no need to declare another.
drivers/usb/atm/speedtch.c:832:7: warning: symbol 'i' shadows an earlier one
drivers/usb/atm/speedtch.c:766:6: originally declared here

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: cp2101.c fix sparse signedness mismatch warnings
Harvey Harrison [Fri, 30 May 2008 17:29:55 +0000 (10:29 -0700)]
USB: cp2101.c fix sparse signedness mismatch warnings

The get/set 2101_config helpers take an unsigned int rather than an
int.  It is safe to change these in each case and may even produce
better code as it will be an unsigned divide rather than a signed
divide in places.  All other manipulation was setting/masking bits
which will not be affected by the sign change.

Fixes the following sparse warnings:
drivers/usb/serial/cp2101.c:378:44: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:378:44:    expected unsigned int *data
drivers/usb/serial/cp2101.c:378:44:    got int *<noident>
drivers/usb/serial/cp2101.c:388:40: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:388:40:    expected unsigned int *data
drivers/usb/serial/cp2101.c:388:40:    got int *<noident>
drivers/usb/serial/cp2101.c:413:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:413:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:413:42:    got int *<noident>
drivers/usb/serial/cp2101.c:421:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:421:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:421:42:    got int *<noident>
drivers/usb/serial/cp2101.c:444:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:444:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:444:42:    got int *<noident>
drivers/usb/serial/cp2101.c:451:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:451:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:451:42:    got int *<noident>
drivers/usb/serial/cp2101.c:458:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:458:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:458:42:    got int *<noident>
drivers/usb/serial/cp2101.c:471:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:471:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:471:42:    got int *<noident>
drivers/usb/serial/cp2101.c:481:42: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:481:42:    expected unsigned int *data
drivers/usb/serial/cp2101.c:481:42:    got int *<noident>
drivers/usb/serial/cp2101.c:561:41: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:561:41:    expected unsigned int *data
drivers/usb/serial/cp2101.c:561:41:    got int *<noident>
drivers/usb/serial/cp2101.c:591:45: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:591:45:    expected unsigned int *data
drivers/usb/serial/cp2101.c:591:45:    got int *<noident>
drivers/usb/serial/cp2101.c:597:41: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:597:41:    expected unsigned int *data
drivers/usb/serial/cp2101.c:597:41:    got int *<noident>
drivers/usb/serial/cp2101.c:608:45: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:608:45:    expected unsigned int *data
drivers/usb/serial/cp2101.c:608:45:    got int *<noident>
drivers/usb/serial/cp2101.c:614:41: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:614:41:    expected unsigned int *data
drivers/usb/serial/cp2101.c:614:41:    got int *<noident>
drivers/usb/serial/cp2101.c:623:45: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:623:45:    expected unsigned int *data
drivers/usb/serial/cp2101.c:623:45:    got int *<noident>
drivers/usb/serial/cp2101.c:680:50: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:680:50:    expected unsigned int *data
drivers/usb/serial/cp2101.c:680:50:    got int *<noident>
drivers/usb/serial/cp2101.c:690:43: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:690:43:    expected unsigned int *data
drivers/usb/serial/cp2101.c:690:43:    got int *<noident>
drivers/usb/serial/cp2101.c:715:41: warning: incorrect type in argument 3 (different signedness)
drivers/usb/serial/cp2101.c:715:41:    expected unsigned int *data
drivers/usb/serial/cp2101.c:715:41:    got int *<noident>

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: digi_accelport.c trivial sparse lock annotation
Harvey Harrison [Fri, 30 May 2008 17:18:53 +0000 (10:18 -0700)]
USB: digi_accelport.c trivial sparse lock annotation

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ohci-ppc-of: use linux/of_platform.h instead of asm
Stephen Rothwell [Fri, 23 May 2008 06:37:58 +0000 (16:37 +1000)]
USB: ohci-ppc-of: use linux/of_platform.h instead of asm

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: sisusb: Push down the BKL
Alan Cox [Thu, 22 May 2008 21:48:48 +0000 (22:48 +0100)]
USB: sisusb: Push down the BKL

This is another case where the lock_kernel appears to be unneccessary and
could be removed with a bit more investigative work

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: rio100: Push down the BKL
Alan Cox [Thu, 22 May 2008 21:47:31 +0000 (22:47 +0100)]
USB: rio100: Push down the BKL

The BKL is actually probably not needed as the mutex seems sufficient. If
so then a further patch to drop it would be a good followup.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: auerwald: Push down the BKL into the driver
Alan Cox [Thu, 22 May 2008 21:46:25 +0000 (22:46 +0100)]
USB: auerwald: Push down the BKL into the driver

Also fix the unknown ioctl return code

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: iowarrior: Push down BKL
Alan Cox [Thu, 22 May 2008 21:06:02 +0000 (22:06 +0100)]
USB: iowarrior: Push down BKL

I'm pretty sure the mutex is sufficient for all locking but will come
back to that later if the USB folks don't beat me to it. For now get rid
of the old BKL ioctl method and wrap the ioctl handler

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: usblcd: Push down BKL into driver
Alan Cox [Thu, 22 May 2008 21:07:51 +0000 (22:07 +0100)]
USB: usblcd: Push down BKL into driver

I'm pretty sure this can be eliminated however I couldn't prove (or find)
what stopped the device vanishing mid IOCTL_GET_HARD_VERSION. Perhaps a
USB wizard could double check that and see if the lock_kernel can go
entirely.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ftdi_usb: Eliminate ioctl and BKL ioctl use
Alan Cox [Thu, 22 May 2008 21:04:48 +0000 (22:04 +0100)]
USB: ftdi_usb: Eliminate ioctl and BKL ioctl use

ftdi has one ioctl, which is buggy and for debugging. Kill it off

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: gadget: Push BKL down into drivers
Alan Cox [Thu, 22 May 2008 21:03:27 +0000 (22:03 +0100)]
USB: gadget: Push BKL down into drivers

This keeps the gadget ioctl method wrapped but pushes the BKL down into
the gadget code so we can use unlocked_ioctl().

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb ethernet gadget: use composite gadget framework
David Brownell [Fri, 20 Jun 2008 01:20:11 +0000 (18:20 -0700)]
usb ethernet gadget: use composite gadget framework

Building on the previous patches which took code from this driver and
pakaged it in more-reusable network "function" components, this patch
gets rid of the original code and uses those components instead.

As seen with the other gadget driver conversions, the resulting code
is much easier to understand and (presumably) work with.  In this case
that's especially true, since the Ethernet gadget had grown to handle
three (!) different Ethernet-over-USB protocols.  This modularization
should make it much easier to add a fourth option for the newish CDC
"Ethernet Emulation Model" (or EEM).

Lightly tested, primarily at full speed.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget: new "CDC Composite" gadget driver
David Brownell [Fri, 20 Jun 2008 01:20:26 +0000 (18:20 -0700)]
usb gadget: new "CDC Composite" gadget driver

This is a simple example of a composite gadget, combining two
Communications Class Device (CDC) functions:  ECM and ACM.

This provides a clear example of how the composite gadget framework
is intended to work.  It's surprising that MS-Windows (or at least,
XP and previous) won't "just work" with something this simple...

One /proc/bus/usb/devices listing looks like:

  T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 46 Spd=480 MxCh= 0
  D:  Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
  P:  Vendor=0525 ProdID=a4aa Rev= 3.01
  S:  Manufacturer=Linux 2.6.26-rc6-pnut with net2280
  S:  Product=CDC Composite Gadget
  C:* #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr=  2mA
  I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=cdc_ether
  E:  Ad=83(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
  I:  If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
  I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
  E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
  E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
  I:* If#= 2 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=cdc_acm
  E:  Ad=86(I) Atr=03(Int.) MxPS=   8 Ivl=32ms
  I:* If#= 3 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
  E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
  E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Not all USB peripheral controller hardware can support this driver.
All the highspeed-capable peripheral controllers with drivers now in
the mainline kernel seem to support this, as does omap_udc.  But
many full speed controllers don't have enough endpoints, or (as with
the PXA controllers) don't support altsettings.

Lightly tested.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb ethernet gadget: split RNDIS function
David Brownell [Fri, 20 Jun 2008 01:20:04 +0000 (18:20 -0700)]
usb ethernet gadget: split RNDIS function

This is a RNDIS function driver, extracted from the all-in-one
Ethernet gadget driver.

Lightly tested ... there seems to be a pre-existing problem when
talking to Windows XP SP2, not quite sure what's up with that yet.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb ethernet gadget: split CDC Ethernet function
David Brownell [Fri, 20 Jun 2008 01:19:46 +0000 (18:19 -0700)]
usb ethernet gadget: split CDC Ethernet function

This is a "CDC Ethernet" (ECM) function driver, extracted from the
all-in-one Ethernet gadget driver.

This is a good example of how to implement interface altsettings.
In fact it's currently the only such example in the gadget stack,
pending addition of OBEX support.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb ethernet gadget: split CDC Subset function
David Brownell [Fri, 20 Jun 2008 01:19:32 +0000 (18:19 -0700)]
usb ethernet gadget: split CDC Subset function

This is a simple "CDC Subset" (and MCCI "SAFE") function driver, extracted
from the all-in-one Ethernet gadget driver.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb ethernet gadget: split out network core
David Brownell [Fri, 20 Jun 2008 01:19:28 +0000 (18:19 -0700)]
usb ethernet gadget: split out network core

Abstract the peripheral side Ethernet-over-USB link layer code from
the all-in-one Ethernet gadget driver into a component that can be
called by various functions, so the various flavors can be split
apart and selectively reused.

A notable difference from the approach taken with the serial link
layer code (beyond talking to NET not TTY) is that because of the
initialization requirements, this only supports one network link.
(And one set of Ethernet link addresses.)

That is, each configuration may have only one instance of a network
function.  This doesn't change behavior; the current code has that
same restriction.  If you want multiple logical links, that can
easily be done using network layer tools.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget: RNDIS cleanups
David Brownell [Fri, 20 Jun 2008 01:19:16 +0000 (18:19 -0700)]
usb gadget: RNDIS cleanups

Some cleanup to the RNDIS code:

 - Minor bugfix:  rndis_unit() is supposed to put the link into the
   RNDIS_UNINITIALIZED state, which does not mean "unused".  There's
   a separate method to stop using the link.  (Bug doesn't affect
   anything right now because of how the code is used.)

 - Reduce coupling between RNDIS code and its user(s), in preparation
   for updates in that code:

    * Decouple RNDIS_RESPONSE_AVAILABLE notifications from net_device
      by passing just a void* handle.  (Also, remove the unused return
      value of the notification callback.)
    * When it needs a copy of net_device stats, just ask for it

 - Remove unused/untested code backing various never-used OIDs:

    * RNDIS_PM, RNDIS_WAKEUP ... "should" get implemented, but the
      relevant docs were unclear, ambguous, and incomplete.  Someone
      with access to the Hidden Gospels (maybe in the EU?) might be
      able to figure out what this should do.
    * RNDIS_OPTIONAL_STATS ... as the name suggests, optional.  Never
      implemented in part because not all the semantics were clear.
    * OID_GEN_RNDIS_CONFIG_PARAMETER, which has been #if 0 forever.

 - A few small whitespace fixes

Plus switch the VERBOSE symbol over to the newer VERBOSE_DEBUG style.

There should be no functional changes because of this patch; it's a
net source code shrink (because of the dead/unused code removal) and
a small object code shrink (a couple hundred bytes on ARMv5).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget serial: use composite gadget framework
David Brownell [Fri, 20 Jun 2008 01:19:03 +0000 (18:19 -0700)]
usb gadget serial: use composite gadget framework

This switches the serial gadget over to using the new "function"
versions of the serial port interfacing code.  The remaining code
in the main source file is quite small...

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget serial: split out generic serial function
David Brownell [Fri, 20 Jun 2008 01:18:50 +0000 (18:18 -0700)]
usb gadget serial: split out generic serial function

Split out the generic serial support into a "function driver".  This
closely mimics the ACM support, but with a MUCH simpler control model.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget serial: split out CDC ACM function
David Brownell [Fri, 20 Jun 2008 01:18:40 +0000 (18:18 -0700)]
usb gadget serial: split out CDC ACM function

Split out CDC ACM parts of "gadget serial" to a "function driver".
Some key structural differences from the previous ACM support, shared
with with the generic serial function (next patch):

 - As a function driver, it can be combined with other functions.
   One gadget configuration could offer both serial and network
   links, as an example.

 - One serial port can be exposed in multiple configurations;
   the /dev/ttyGS0 node could be exposed regardless of which
   config the host selected.

 - One configuration can expose multiple serial ports, such as
   ttyGS0, ttyGS1, ttyGS2, and ttyGS3.

This code should be a lot easier to understand than the previous
all-in-one-big-file version of the driver.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget zero: use composite gadget framework
David Brownell [Fri, 20 Jun 2008 01:18:27 +0000 (18:18 -0700)]
usb gadget zero: use composite gadget framework

Update Gadget Zero to use the more modular versions of the loopback
and source/sink configuration drivers which build on the new gadget
framework code.

The core code is a LOT simpler, and it should be much easier now to
understand how the parts fit together.  The conversion is an overall
source shrink in terms of this gadget, since it uses more midlayer
support.  However, it's an overall increase in object size because
there's less sharing between the two configurations (improves code
clarity) and because the midlayer is a bit more functional than this
driver actually needs.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget zero: split out loopback config
David Brownell [Fri, 20 Jun 2008 00:55:35 +0000 (17:55 -0700)]
usb gadget zero: split out loopback config

This splits the gadget zero "loopback" configuration into a standalone
"configuration driver", building on the composite gadget framework code.
It doesn't yet pull the original code out of gadget zero or update how
that driver is built.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget zero: split out source/sink config
David Brownell [Fri, 20 Jun 2008 00:55:23 +0000 (17:55 -0700)]
usb gadget zero: split out source/sink config

This splits the gadget zero "source/sink" configuration into a standalone
"configuration driver", building on the composite gadget framework code.
It doesn't yet pull the original code out of gadget zero or update how
that driver is built.

Neither this, nor its sibling "loopback" configuration, is a function
driver that can be combined with other functions.  (The host "usbtest"
driver wouldn't know how to deal with that!)  However the code becomes
simpler because of this conversion, so it's a net win.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb gadget: composite gadget core
David Brownell [Fri, 20 Jun 2008 00:52:58 +0000 (17:52 -0700)]
usb gadget: composite gadget core

Add <linux/usb/composite.h> interfaces for composite gadget drivers, and
basic implementation support behind it:

  - struct usb_function ... groups one or more interfaces into a function
    managed as one unit within a configuration, to which it's added by
    usb_add_function().

  - struct usb_configuration ... groups one or more such functions into
    a configuration managed as one unit by a driver, to which it's added
    by usb_add_config().  These operate at either high or full/low speeds
    and at a given bMaxPower.

  - struct usb_composite_driver ... groups one or more such configurations
    into a gadget driver, which may be registered or unregistered.

  - struct usb_composite_dev ... a usb_composite_driver manages this; it
    wraps the usb_gadget exposed by the controller driver.

This also includes some basic kerneldoc.

How to use it (the short version):  provide a usb_composite_driver with a
bind() that calls usb_add_config() for each of the needed configurations.
The configurations in turn have bind() calls, which will usb_add_function()
for each function required.  Each function's bind() allocates resources
needed to perform its tasks, like endpoints; sometimes configurations will
allocate resources too.

Separate patches will convert most gadget drivers to this infrastructure.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>