kernel/kernel-generic.git
11 years agoNVMe: Fix error clean-up on nvme_alloc_queue
Keith Busch [Wed, 1 May 2013 19:07:47 +0000 (13:07 -0600)]
NVMe: Fix error clean-up on nvme_alloc_queue

The nvme_queue's depth is not set if we fail to allocate submission queue
entries, which was being used to determine how much coherent memory to
free on error. Use the depth variable instead.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Free admin queue on request_irq error
Keith Busch [Wed, 1 May 2013 19:07:51 +0000 (13:07 -0600)]
NVMe: Free admin queue on request_irq error

Fixes a potential memory leak if requesting the admin queue irq fails.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Add scsi unmap to SG_IO
Keith Busch [Wed, 24 Apr 2013 21:44:24 +0000 (15:44 -0600)]
NVMe: Add scsi unmap to SG_IO

Translates a scsi unmap request from SG_IO ioctl to NVMe
data-set-management deallocate.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Acked-by: Vishal Verma <vishal.l.verma@linux.intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: queue usage fixes in nvme-scsi
Keith Busch [Thu, 25 Apr 2013 20:39:27 +0000 (14:39 -0600)]
NVMe: queue usage fixes in nvme-scsi

Fixes nvme queue usages in scsi-to-nvme translation code to not get
a queue more often than it is being put, and not use the queue in an
unsafe way without it being locked.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Acked-by: Vishal Verma <vishal.l.verma@linux.intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Set TASK_INTERRUPTIBLE before processing queues
Arjan van de Ven [Wed, 1 May 2013 20:38:23 +0000 (16:38 -0400)]
NVMe: Set TASK_INTERRUPTIBLE before processing queues

The kthread has two tasks; handling timeouts (for which it runs once per
second), and submitting queued BIOs.  If a BIO happens to be queued after
the thread has processed the queue but before it calls schedule_timeout(),
the thread will sleep for a second before submitting it, which can cause
performance problems in some rare cases (that will become more common in
a subsequent patch).

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Tested-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Add a character device for each nvme device
Keith Busch [Tue, 19 Feb 2013 17:17:58 +0000 (10:17 -0700)]
NVMe: Add a character device for each nvme device

Registers a miscellaneous device for each nvme controller probed. This
creates character device files as /dev/nvmeN, where N is the device
instance, and supports nvme admin ioctl commands so devices without
namespaces can be managed.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Fix endian-related problems in user I/O submission path
Matthew Wilcox [Tue, 16 Apr 2013 19:21:06 +0000 (15:21 -0400)]
NVMe: Fix endian-related problems in user I/O submission path

When constructing the command, dsmgmt needs to be treated as a 32-bit
value, not a 16-bit value.  reftag, apptag and appmask all need to be
converted from native-endian to little-endian.  Again, sparse's bitwise
warnings caught this problem.  Thanks to Keith for pointing out the
correct way to fix the reftag.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Acked-by: Keith Busch <keith.busch@intel.com>
11 years agoNVMe: Fix I/O cancellation status on big-endian machines
Matthew Wilcox [Tue, 16 Apr 2013 19:18:30 +0000 (15:18 -0400)]
NVMe: Fix I/O cancellation status on big-endian machines

The sparse bitwise checks pointed out that I needed to shift the status
before changing its endianness, not after.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Fix sparse warnings in scsi emulation
Vishal Verma [Thu, 4 Apr 2013 23:52:27 +0000 (17:52 -0600)]
NVMe: Fix sparse warnings in scsi emulation

Sparse produced warnings for some instances of
mismatched types and direct userspace dereferences.
This patch fixes those for the scsi emulation layer.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Don't fail initialisation unnecessarily
Matthew Wilcox [Tue, 16 Apr 2013 15:22:36 +0000 (11:22 -0400)]
NVMe: Don't fail initialisation unnecessarily

The nvme_dev_add() function currently returns the last error code that it
saw, which (if everything else succeeds) happens to be the result of an
optional command, so it can legitimately fail.  Looking at the error path
more closely reveals that we should return success from this function,
even if no device namespaces are added.  So once the queues are created
and the device has responded to Identify, make sure that this function
succeeds.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Acked-by: Keith Busch <keith.busch@intel.com>
11 years agoNVMe: Abstract out sector to block number conversion
Matthew Wilcox [Thu, 28 Mar 2013 01:28:22 +0000 (21:28 -0400)]
NVMe: Abstract out sector to block number conversion

Introduce nvme_block_nr() to help convert sectors to block numbers.
This fixes an integer overflow in the SCSI conversion layer, and it's
slightly less typing than opencoding it.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Acked-by: Keith Busch <keith.busch@intel.com>
11 years agoNVMe: Use round_jiffies_relative() for the periodic, once-per-second timer
Arjan van de Ven [Mon, 4 Feb 2013 22:44:33 +0000 (14:44 -0800)]
NVMe: Use round_jiffies_relative() for the periodic, once-per-second timer

The nvme driver has a "once per second" event where the management kthread
wakes up the system and then reschedules itself for 1 second later.
For power efficiency reasons, I'd like this timer to happen together
with other wakeups in the system.

This patch makes the schedule_timeout() call in the kthread use
round_jiffies_relative(), causing the wakeup to at least align with other
"once per X seconds" events in the kernel.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Tested-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Add nvme-scsi.c
Vishal Verma [Tue, 5 Mar 2013 01:40:58 +0000 (18:40 -0700)]
NVMe: Add nvme-scsi.c

Translates SCSI commands in SG_IO ioctl to NVMe commands.
Uses the scsi-nvme translation spec from nvmexpress.org as reference.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Add definitions for format command
Vishal Verma [Wed, 27 Mar 2013 11:13:41 +0000 (07:13 -0400)]
NVMe: Add definitions for format command

The SCSI emulation has the ability to send format commands, so we need
to add the definition of the command.  Also add a missing error code.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Move structures & definitions to header file
Vishal Verma [Tue, 5 Mar 2013 01:40:57 +0000 (18:40 -0700)]
NVMe: Move structures & definitions to header file

nvme-scsi.c uses several data structures and definitions that were
previously private to nvme-core.c.  Move the definitions to nvme.h,
protected by __KERNEL__.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Rename nvme.c to nvme-core.c
Vishal Verma [Tue, 5 Mar 2013 01:40:56 +0000 (18:40 -0700)]
NVMe: Rename nvme.c to nvme-core.c

In preparation for adding nvme-scsi.c
It is preferable to retain the module name 'nvme'

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoNVMe: Add discard support for capable devices
Keith Busch [Fri, 9 Nov 2012 23:33:05 +0000 (16:33 -0700)]
NVMe: Add discard support for capable devices

This adds discard support to block queues if the nvme device is capable of
deallocating blocks as indicated by the controller's optional command support.
A discard flagged bio request will submit an NVMe deallocate Data Set
Management command for the requested blocks.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 26 Mar 2013 01:03:34 +0000 (18:03 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "A single bugfix which prevents that a non functional timer device is
  selected to provide the fallback device, which is supposed to serve
  timer interrupts on behalf of non functional devices ..."

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clockevents: Don't allow dummy broadcast timers

11 years agoMerge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
Linus Torvalds [Mon, 25 Mar 2013 16:44:39 +0000 (09:44 -0700)]
Merge tag 'rdma-for-linus' of git://git./linux/kernel/git/roland/infiniband

Pull infiniband/rdma fixes from Roland Dreier:
 "Small batch of InfiniBand/RDMA fixes for 3.9:

   - Fix for TX lockup in IPoIB
   - QLogic -> Intel update for qib driver
   - Small static checker fix for qib
   - Fix error path return value in cxgb4"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/qib: change QLogic to Intel
  IB/ipath: Silence a static checker warning
  IPoIB: Fix send lockup due to missed TX completion
  RDMA/cxgb4: Fix error return code in create_qp()

11 years agoMerge tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Mon, 25 Mar 2013 16:26:10 +0000 (09:26 -0700)]
Merge tag 'fixes' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC bug fixes from Arnd Bergmann:
 "Four patches for arm-soc this week:

   - Kevin Hilman is no longer reachable under his previous email
     address.  He submitted the patch earlier, but nobody felt
     responsible to pick it up.

   - One Tegra fix for an incorect register address in device tree.

   - IMX multiplatform support exposes a configuration option that leads
     to unbootable kernels on all other machines and that needs to
     depend on that platform.

   - A nontrivial bug fix for the setup of the mxs video output."

* tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  MAINTAINERS: update email address for Kevin Hilman
  ARM: tegra: fix register address of slink controller
  ARM: imx: add dependency check for DEBUG_IMX_UART_PORT
  ARM: video: mxs: Fix mxsfb misconfiguring VDCTRL0

11 years agoMerge branch 'for-3.9' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Mon, 25 Mar 2013 16:25:12 +0000 (09:25 -0700)]
Merge branch 'for-3.9' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfixes from J Bruce Fields:
 "Fixes for a couple mistakes in the new DRC code.  And thanks to Kent
  Overstreet for noticing we've been sync'ing the wrong range on stable
  writes since 3.8."

* 'for-3.9' of git://linux-nfs.org/~bfields/linux:
  nfsd: fix bad offset use
  nfsd: fix startup order in nfsd_reply_cache_init
  nfsd: only unhash DRC entries that are in the hashtable

11 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Mon, 25 Mar 2013 09:57:32 +0000 (02:57 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Exynos and Intel fixes.

  The intel fixes are fairly straightforward, mostly reverts due to bugs
  found.  The exynos one is a big larger since they found some issues
  with the G2D engine and iommu interaction, and needed to verify the
  operations a lot better than they were previously, otherwise a user
  app can just crash the kernel with an iommu fault."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  Revert "drm/i915: write backlight harder"
  drm/i915: don't disable the power well yet
  Revert "drm/i915: set TRANSCODER_EDP even earlier"
  drm/exynos: Check g2d cmd list for g2d restrictions
  drm/exynos: Add a new function to get gem buffer size
  drm/exynos: Deal with g2d buffer info more efficiently
  drm/exynos: Clean up some G2D codes for readability
  drm/exynos: Fix G2D core malfunctioning issue
  drm/exynos: clear node object type at gem unmap
  drm/exynos: Fix error routine to getting dma addr.
  drm/exynos: Replaced kzalloc & memcpy with kmemdup
  drm/exynos: fimd: calculate the correct address offset
  drm/exynos: Make mixer_check_timing static
  drm/exynos: modify the compatible string for exynos fimd

11 years agoMerge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel...
Dave Airlie [Mon, 25 Mar 2013 02:20:00 +0000 (12:20 +1000)]
Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel into HEAD

Daniel writes:
"Just three revert/disable by default patches, one of them cc: stable
(since the offending commit was cc: stable, too)."

* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel:
  Revert "drm/i915: write backlight harder"
  drm/i915: don't disable the power well yet
  Revert "drm/i915: set TRANSCODER_EDP even earlier"

11 years agoMerge branch 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Dave Airlie [Mon, 25 Mar 2013 02:19:10 +0000 (12:19 +1000)]
Merge branch 'exynos-drm-fixes' of git://git./linux/kernel/git/daeinki/drm-exynos into HEAD

Inki writes:
Includes bug fixes and code cleanups.
And it considers some restrictions to G2D hardware.
With this, the malfunction and page fault issues to g2d driver
would be fixed.

* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm/exynos: Check g2d cmd list for g2d restrictions
  drm/exynos: Add a new function to get gem buffer size
  drm/exynos: Deal with g2d buffer info more efficiently
  drm/exynos: Clean up some G2D codes for readability
  drm/exynos: Fix G2D core malfunctioning issue
  drm/exynos: clear node object type at gem unmap
  drm/exynos: Fix error routine to getting dma addr.
  drm/exynos: Replaced kzalloc & memcpy with kmemdup
  drm/exynos: fimd: calculate the correct address offset
  drm/exynos: Make mixer_check_timing static
  drm/exynos: modify the compatible string for exynos fimd

11 years agoMerge tag 'pinctrl-fixes-for-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 24 Mar 2013 17:11:29 +0000 (10:11 -0700)]
Merge tag 'pinctrl-fixes-for-v3.9' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pinctrl fixes from Linus Walleij:
 "Here are a few pinctrl fixes for the v3.9 rc series:
   - Usecount bounds checking so we do not go below zero on mux
     usecounts.
   - Loop range checking in GPIO ranges in the DT range parser.
   - Proper print in debugfs for pinconf state.
   - Fix compilation bug in generic pinconf code.
   - Minor bugfixes to abx500 and mvebu drivers."

* tag 'pinctrl-fixes-for-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinmux: forbid mux_usecount to be set at UINT_MAX
  pinctrl: mvebu: fix checking for SoC specific controls
  pinctrl: generic: Fix compilation error
  pinctrl: Print the correct information in debugfs pinconf-state file
  pinctrl: abx500: Fix checking if pin use AlternateFunction register
  gpio: fix wrong checking condition for gpio range

11 years agoMerge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Linus Torvalds [Sun, 24 Mar 2013 17:10:34 +0000 (10:10 -0700)]
Merge branch 'x86/urgent' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Peter Anvin:
 "A collection of minor fixes, more EFI variables paranoia
  (anti-bricking) plus the ability to disable the pstore either as a
  runtime default or completely, due to bricking concerns."

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efivars: Fix check for CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE
  x86, microcode_intel_early: Mark apply_microcode_early() as cpuinit
  efivars: Handle duplicate names from get_next_variable()
  efivars: explicitly calculate length of VariableName
  efivars: Add module parameter to disable use as a pstore backend
  efivars: Allow disabling use as a pstore backend
  x86-32, microcode_intel_early: Fix crash with CONFIG_DEBUG_VIRTUAL
  x86-64: Fix the failure case in copy_user_handle_tail()

11 years agoRevert "drm/i915: write backlight harder"
Daniel Vetter [Fri, 22 Mar 2013 14:44:46 +0000 (15:44 +0100)]
Revert "drm/i915: write backlight harder"

This reverts commit cf0a6584aa6d382f802f2c3cacac23ccbccde0cd.

Turns out that cargo-culting breaks systems. Note that we can't revert
further, since

commit 770c12312ad617172b1a65b911d3e6564fc5aca8
Author: Takashi Iwai <tiwai@suse.de>
Date:   Sat Aug 11 08:56:42 2012 +0200

    drm/i915: Fix blank panel at reopening lid

fixed a regression in 3.6-rc kernels for which we've never figured out
the exact root cause. But some further inspection of the backlight
code reveals that it's seriously lacking locking. And especially the
asle backlight update is know to get fired (through some smm magic)
when writing specific backlight control registers. So the possibility
of suffering from races is rather real.

Until those races are fixed I don't think it makes sense to try
further hacks. Which sucks a bit, but sometimes that's how it is :(

References: http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=47941
Tested-by: Takashi Iwai <tiwai@suse.de>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: stable@vger.kernel.org (the reverted commit was cc: stable, too)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: don't disable the power well yet
Paulo Zanoni [Fri, 22 Mar 2013 17:07:23 +0000 (14:07 -0300)]
drm/i915: don't disable the power well yet

We're still not 100% ready to disable the power well, so don't disable
it for now. When we disable it we break the audio driver (because some
of the audio registers are on the power well) and machines with eDP on
port D (because it doesn't use TRANSCODER_EDP).

Also, instead of just reverting the code, add a Kernel option to let
us disable it if we want. This will allow us to keep developing and
testing the feature while it's not enabled.

This fixes problems caused by the following commit:
  commit d6dd9eb1d96d2b7345fe4664066c2b7ed86da898
  Author: Daniel Vetter <daniel.vetter@ffwll.ch>
  Date:   Tue Jan 29 16:35:20 2013 -0200
       drm/i915: dynamic Haswell display power well support

References: http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoRevert "drm/i915: set TRANSCODER_EDP even earlier"
Daniel Vetter [Fri, 22 Mar 2013 09:53:40 +0000 (10:53 +0100)]
Revert "drm/i915: set TRANSCODER_EDP even earlier"

This reverts commit cc464b2a17c59adedbdc02cc54341d630354edc3.

The reason is that Takashi Iwai reported a regression bisected to this
commit:

http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html

His machine has eDP on port D (usual desktop all-in-on setup), which
intel_dp.c identifies as an eDP panel, but the hsw ddi code
mishandles.

Closer inspection of the code reveals that haswell_crtc_mode_set also
checks intel_encoder_is_pch_edp when setting is_cpu_edp. On haswell
that doesn't make much sense (since there's no edp on the pch), but
what this function _really_ checks is whether that edp connector is on
port A or port D. It's just that on ilk-ivb port D was on the pch ...

So that explains why this seemingly innocent change killed eDP on port
D. Furthermore it looks like everything else accidentally works, since
we've never enabled eDP on port D support for hsw intentionally (e.g.
we still register the HDMI output for port D in that case).

But in retrospective I also don't like that this leaks highly platform
specific details into common code, and the reason is that the drm
vblank layer sucks. So instead I think we should:
- move the cpu_transcoder into the dynamic pipe_config tracking (once
  that's merged).
- fix up the drm vblank layer to finally deal with kms crtc objects
  instead of int pipes.

v2: Pimp commit message with the better diagnosis as discussed with
Paulo on irc.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoMerge tag 'efi-for-3.9-rc4' into x86/urgent
H. Peter Anvin [Sun, 24 Mar 2013 04:49:51 +0000 (21:49 -0700)]
Merge tag 'efi-for-3.9-rc4' into x86/urgent

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
11 years agoLinux 3.9-rc4
Linus Torvalds [Sat, 23 Mar 2013 23:52:44 +0000 (16:52 -0700)]
Linux 3.9-rc4

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Sat, 23 Mar 2013 23:51:55 +0000 (16:51 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "These are mostly minor fixes this time around.  The iscsi-target CHAP
  big-endian bugfix and bump FD_MAX_SECTORS=2048 default patch to allow
  1MB sized I/Os for FILEIO backends on >= v3.5 code are both CC'ed to
  stable.

  Also, there is a persistent reservations regression that has recently
  been reported for >= v3.8.x code, that is currently being tracked down
  for v3.9."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  target/pscsi: Reject cross page boundary case in pscsi_map_sg
  target/file: Bump FD_MAX_SECTORS to 2048 to handle 1M sized I/Os
  tcm_vhost: Flush vhost_work in vhost_scsi_flush()
  tcm_vhost: Add missed lock in vhost_scsi_clear_endpoint()
  target: fix possible memory leak in core_tpg_register()
  target/iscsi: Fix mutual CHAP auth on big-endian arches
  target_core_sbc: use noop for SYNCHRONIZE_CACHE

11 years agoMerge tag 'md-3.9-fixes' of git://neil.brown.name/md
Linus Torvalds [Sat, 23 Mar 2013 22:49:49 +0000 (15:49 -0700)]
Merge tag 'md-3.9-fixes' of git://neil.brown.name/md

Pull md fixes from NeilBrown:
 "A few bugfixes for md

   - recent regressions in raid5
   - recent regressions in dmraid
   - a few instances of CONFIG_MULTICORE_RAID456 linger

  Several tagged for -stable"

* tag 'md-3.9-fixes' of git://neil.brown.name/md:
  md: remove CONFIG_MULTICORE_RAID456 entirely
  md/raid5: ensure sync and DISCARD don't happen at the same time.
  MD: Prevent sysfs operations on uninitialized kobjects
  MD RAID5: Avoid accessing gendisk or queue structs when not available
  md/raid5: schedule_construction should abort if nothing to do.

11 years agoMerge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik...
Linus Torvalds [Sat, 23 Mar 2013 19:33:36 +0000 (12:33 -0700)]
Merge tag 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

Pull libata updates from Jeff Garzik:
 "Simple stuff.  See one-line summaries."

* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  pata_samsung_cf: use module_platform_driver_probe()
  [libata] Avoid specialized TLA's in ZPODD's Kconfig
  libata-acpi.c: fix copy and paste mistake in ata_acpi_register_power_resource
  sata_fsl: Remove redundant NULL check before kfree
  ahci: Add Device IDs for Intel Wellsburg PCH
  ata_piix: Add MODULE_PARM_DESC to prefer_ms_hyperv

11 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sat, 23 Mar 2013 19:32:14 +0000 (12:32 -0700)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "One bugfix for the tegra driver.  Two updates regarding email
  addresses and MAINTAINERS which I like to have up-to-date so people
  can be reached immediately.  While we are here, there is on PCI_ID
  addition."

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  MAINTAINERS: add maintainer entry for atmel i2c driver
  i2c: Fix my e-mail address in drivers and documentation
  i2c: iSMT: add Intel Avoton DeviceIDs
  i2c: tegra: check the clk_prepare_enable() return value

11 years agoMerge git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Sat, 23 Mar 2013 19:30:39 +0000 (12:30 -0700)]
Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog fixes from Wim Van Sebroeck:
 "Fix a boot issues and correct the AcpiMmioSel bitmask in the
  sp5100_tco watchdog device driver"

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2
  watchdog: sp5100_tco: Remove code that may cause a boot failure

11 years agoKMS: fix EDID detailed timing frame rate
Torsten Duwe [Sat, 23 Mar 2013 14:39:34 +0000 (15:39 +0100)]
KMS: fix EDID detailed timing frame rate

When KMS has parsed an EDID "detailed timing", it leaves the frame rate
zeroed.  Consecutive (debug-) output of that mode thus yields 0 for
vsync.  This simple fix also speeds up future invocations of
drm_mode_vrefresh().

While it is debatable whether this qualifies as a -stable fix I'd apply
it for consistency's sake; drm_helper_probe_single_connector_modes()
does the same thing already for all probed modes.

Cc: stable@vger.kernel.org
Signed-off-by: Torsten Duwe <duwe@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoKMS: fix EDID detailed timing vsync parsing
Torsten Duwe [Sat, 23 Mar 2013 14:38:22 +0000 (15:38 +0100)]
KMS: fix EDID detailed timing vsync parsing

EDID spreads some values across multiple bytes; bit-fiddling is needed
to retrieve these.  The current code to parse "detailed timings" has a
cut&paste error that results in a vsync offset of at most 15 lines
instead of 63.

See

   http://en.wikipedia.org/wiki/EDID

and in the "EDID Detailed Timing Descriptor" see bytes 10+11 show why
that needs to be a left shift.

Cc: stable@vger.kernel.org
Signed-off-by: Torsten Duwe <duwe@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge branches 'cxgb4', 'ipoib' and 'qib' into for-next
Roland Dreier [Sat, 23 Mar 2013 01:08:03 +0000 (18:08 -0700)]
Merge branches 'cxgb4', 'ipoib' and 'qib' into for-next

11 years agoIB/qib: change QLogic to Intel
Vinit Agnihotri [Thu, 14 Mar 2013 18:13:41 +0000 (18:13 +0000)]
IB/qib: change QLogic to Intel

These changes modify the qib driver as part of acquiring
the InfiniBand assets of QLogic.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
11 years agoIB/ipath: Silence a static checker warning
Dan Carpenter [Mon, 18 Mar 2013 20:25:26 +0000 (20:25 +0000)]
IB/ipath: Silence a static checker warning

I have a static checker which complains that 0x255 is too high for
the "dev->opstats[opcode]" array.  It turns out that the hardware
has already validated the opcode at this point so it can't actually
overflow.

However, silencing the warning is good and this matches how the
opcode is treated in qib_ib_rcv() as well.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
11 years agoIPoIB: Fix send lockup due to missed TX completion
Mike Marciniszyn [Tue, 26 Feb 2013 15:46:27 +0000 (15:46 +0000)]
IPoIB: Fix send lockup due to missed TX completion

Commit f0dc117abdfa ("IPoIB: Fix TX queue lockup with mixed UD/CM
traffic") attempts to solve an issue where unprocessed UD send
completions can deadlock the netdev.

The patch doesn't fully resolve the issue because if more than half
the tx_outstanding's were UD and all of the destinations are RC
reachable, arming the CQ doesn't solve the issue.

This patch uses the IB_CQ_REPORT_MISSED_EVENTS on the
ib_req_notify_cq().  If the rc is above 0, the UD send cq completion
callback is called directly to re-arm the send completion timer.

This issue is seen in very large parallel filesystem deployments
and the patch has been shown to correct the issue.

Cc: <stable@vger.kernel.org>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
11 years agoRDMA/cxgb4: Fix error return code in create_qp()
Wei Yongjun [Fri, 15 Mar 2013 09:42:12 +0000 (09:42 +0000)]
RDMA/cxgb4: Fix error return code in create_qp()

Fix to return a negative error code from the error handling case
instead of 0, as returned elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
11 years agoMerge git://git.infradead.org/users/willy/linux-nvme
Linus Torvalds [Fri, 22 Mar 2013 23:43:53 +0000 (16:43 -0700)]
Merge git://git.infradead.org/users/willy/linux-nvme

Pull NVMe driver update from Matthew Wilcox:
 "These patches have mostly been baking for a few months; sorry I didn't
  get them in during the merge window.  They're all bug fixes, except
  for the addition of the SMART log and the addition to MAINTAINERS."

* git://git.infradead.org/users/willy/linux-nvme:
  NVMe: Add namespaces with no LBA range feature
  MAINTAINERS: Add entry for the NVMe driver
  NVMe: Initialize iod nents to 0
  NVMe: Define SMART log
  NVMe: Add result to nvme_get_features
  NVMe: Set result from user admin command
  NVMe: End queued bio requests when freeing queue
  NVMe: Free cmdid on nvme_submit_bio error

11 years agoMerge branch 'akpm' (fixes from Andrew)
Linus Torvalds [Fri, 22 Mar 2013 23:41:44 +0000 (16:41 -0700)]
Merge branch 'akpm' (fixes from Andrew)

Merge misc fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mqueue: sys_mq_open: do not call mnt_drop_write() if read-only
  mm/hotplug: only free wait_table if it's allocated by vmalloc
  dma-debug: update DMA debug API to better handle multiple mappings of a buffer
  dma-debug: fix locking bug in check_unmap()
  drivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR
  drivers/video/ep93xx-fb.c: include <linux/io.h> for devm_ioremap()
  drivers/rtc/rtc-da9052.c: fix for rtc device registration
  mm: zone_end_pfn is too small
  poweroff: change orderly_poweroff() to use schedule_work()
  mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting
  printk: Provide a wake_up_klogd() off-case
  irq_work.h: fix warning when CONFIG_IRQ_WORK=n

11 years agomqueue: sys_mq_open: do not call mnt_drop_write() if read-only
Vladimir Davydov [Fri, 22 Mar 2013 22:04:51 +0000 (15:04 -0700)]
mqueue: sys_mq_open: do not call mnt_drop_write() if read-only

mnt_drop_write() must be called only if mnt_want_write() succeeded,
otherwise the mnt_writers counter will diverge.

mnt_writers counters are used to check if remounting FS as read-only is
OK, so after an extra mnt_drop_write() call, it would be impossible to
remount mqueue FS as read-only.  Besides, on umount a warning would be
printed like this one:

  =====================================
  [ BUG: bad unlock balance detected! ]
  3.9.0-rc3 #5 Not tainted
  -------------------------------------
  a.out/12486 is trying to release lock (sb_writers) at:
  mnt_drop_write+0x1f/0x30
  but there are no more locks to release!

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm/hotplug: only free wait_table if it's allocated by vmalloc
Jianguo Wu [Fri, 22 Mar 2013 22:04:50 +0000 (15:04 -0700)]
mm/hotplug: only free wait_table if it's allocated by vmalloc

zone->wait_table may be allocated from bootmem, it can not be freed.

Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodma-debug: update DMA debug API to better handle multiple mappings of a buffer
Alexander Duyck [Fri, 22 Mar 2013 22:04:49 +0000 (15:04 -0700)]
dma-debug: update DMA debug API to better handle multiple mappings of a buffer

There were reports of the igb driver unmapping buffers without calling
dma_mapping_error.  On closer inspection issues were found in the DMA
debug API and how it handled multiple mappings of the same buffer.

The issue I found is the fact that the debug_dma_mapping_error would
only set the map_err_type to MAP_ERR_CHECKED in the case that the was
only one match for device and device address.  However in the case of
non-IOMMU, multiple addresses existed and as a result it was not setting
this field once a second mapping was instantiated.  I have resolved this
by changing the search so that it instead will now set MAP_ERR_CHECKED
on the first buffer that matches the device and DMA address that is
currently in the state MAP_ERR_NOT_CHECKED.

A secondary side effect of this patch is that in the case of multiple
buffers using the same address only the last mapping will have a valid
map_err_type.  The previous mappings will all end up with map_err_type
set to MAP_ERR_CHECKED because of the dma_mapping_error call in
debug_dma_map_page.  However this behavior may be preferable as it means
you will likely only see one real error per multi-mapped buffer, versus
the current behavior of multiple false errors mer multi-mapped buffer.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Shuah Khan <shuah.khan@hp.com>
Tested-by: Shuah Khan <shuah.khan@hp.com>
Cc: Jakub Kicinski <kubakici@wp.pl>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodma-debug: fix locking bug in check_unmap()
Alexander Duyck [Fri, 22 Mar 2013 22:04:48 +0000 (15:04 -0700)]
dma-debug: fix locking bug in check_unmap()

In check_unmap() it is possible to get into a dead-locked state if
dma_mapping_error is called.  The problem is that the bucket is locked in
check_unmap, and locked again by debug_dma_mapping_error which is called
by dma_mapping_error.  To resolve that we must release the lock on the
bucket before making the call to dma_mapping_error.

[akpm@linux-foundation.org: restore 80-col trickery to be consistent with the rest of the file]
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Shuah Khan <shuah.khan@hp.com>
Tested-by: Shuah Khan <shuah.khan@hp.com>
Cc: Jakub Kicinski <kubakici@wp.pl>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR
Nicolas Ferre [Fri, 22 Mar 2013 22:04:47 +0000 (15:04 -0700)]
drivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR

On some revisions of AT91 SoCs, the RTC IMR register is not working.
Instead of elaborating a workaround for that specific SoC or IP version,
we simply use a software variable to store the Interrupt Mask Register
and modify it for each enabling/disabling of an interrupt.  The overhead
of this is negligible anyway.

The interrupt mask register (IMR) for the RTC is broken on the AT91SAM9x5
sub-family of SoCs (good overview of the members here:
http://www.eewiki.net/display/linuxonarm/AT91SAM9x5 ).  The "user visible
effect" is the RTC doesn't work.

That sub-family is less than two years old and only has devicetree (DT)
support and came online circa lk 3.7 .  The dust is yet to settle on the
DT stuff at least for AT91 SoCs (translation: lots of stuff is still
broken, so much that it is hard to know where to start).

The fix in the patch is pretty simple: just shadow the silicon IMR
register with a variable in the driver.  Some older SoCs (pre-DT) use the
the rtc-at91rm9200 driver (e.g.  obviously the AT91RM9200) and they should
not be impacted by the change.  There shouldn't be a large volume of
interrupts associated with a RTC.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reported-by: Douglas Gilbert <dgilbert@interlog.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrivers/video/ep93xx-fb.c: include <linux/io.h> for devm_ioremap()
H Hartley Sweeten [Fri, 22 Mar 2013 22:04:45 +0000 (15:04 -0700)]
drivers/video/ep93xx-fb.c: include <linux/io.h> for devm_ioremap()

Commit be8678149701 ("drivers/video/ep93xx-fb.c: use devm_ functions")
introduced a build error:

  drivers/video/ep93xx-fb.c: In function 'ep93xxfb_probe':
  drivers/video/ep93xx-fb.c:532: error: implicit declaration of function 'devm_ioremap'
  drivers/video/ep93xx-fb.c:533: warning: assignment makes pointer from integer without a cast

Include <linux/io.h> to pickup the declaration of 'devm_ioremap'.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Ryan Mallon <rmallon@gmail.com>
Cc: Damien Cassou <damien.cassou@lifl.fr>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrivers/rtc/rtc-da9052.c: fix for rtc device registration
Ashish Jangam [Fri, 22 Mar 2013 22:04:44 +0000 (15:04 -0700)]
drivers/rtc/rtc-da9052.c: fix for rtc device registration

Add support for the virtual irq since now MFD only handles virtual irq
Without this patch rtc device will fail in registration.

(akpm: Ashish has a different version whcih will be needed for 3.8.x and
earlier kernels)

Signed-off-by: Ashish <ashish.jangam@kpitcummins.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: zone_end_pfn is too small
Russ Anderson [Fri, 22 Mar 2013 22:04:43 +0000 (15:04 -0700)]
mm: zone_end_pfn is too small

Booting with 32 TBytes memory hits BUG at mm/page_alloc.c:552! (output
below).

The key hint is "page 4294967296 outside zone".
4294967296 = 0x100000000 (bit 32 is set).

The problem is in include/linux/mmzone.h:

  530 static inline unsigned zone_end_pfn(const struct zone *zone)
  531 {
  532         return zone->zone_start_pfn + zone->spanned_pages;
  533 }

zone_end_pfn is "unsigned" (32 bits).  Changing it to "unsigned long"
(64 bits) fixes the problem.

zone_end_pfn() was added recently in commit 108bcc96ef70 ("mm: add & use
zone_end_pfn() and zone_spans_pfn()")

Output from the failure.

  No AGP bridge found
  page 4294967296 outside zone [ 4294967296 - 4327469056 ]
  ------------[ cut here ]------------
  kernel BUG at mm/page_alloc.c:552!
  invalid opcode: 0000 [#1] SMP
  Modules linked in:
  CPU 0
  Pid: 0, comm: swapper Not tainted 3.9.0-rc2.dtp+ #10
  RIP: free_one_page+0x382/0x430
  Process swapper (pid: 0, threadinfo ffffffff81942000, task ffffffff81955420)
  Call Trace:
    __free_pages_ok+0x96/0xb0
    __free_pages+0x25/0x50
    __free_pages_bootmem+0x8a/0x8c
    __free_memory_core+0xea/0x131
    free_low_memory_core_early+0x4a/0x98
    free_all_bootmem+0x45/0x47
    mem_init+0x7b/0x14c
    start_kernel+0x216/0x433
    x86_64_start_reservations+0x2a/0x2c
    x86_64_start_kernel+0x144/0x153
  Code: 89 f1 ba 01 00 00 00 31 f6 d3 e2 4c 89 ef e8 66 a4 01 00 e9 2c fe ff ff 0f 0b eb fe 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 eb f3 <0f> 0b eb fe 0f 0b 0f 1f 84 00 00 00 00 00 eb f6 0f 0b eb fe 49

Signed-off-by: Russ Anderson <rja@sgi.com>
Reported-by: George Beshers <gbeshers@sgi.com>
Acked-by: Hedi Berriche <hedi@sgi.com>
Cc: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agopoweroff: change orderly_poweroff() to use schedule_work()
Oleg Nesterov [Fri, 22 Mar 2013 22:04:41 +0000 (15:04 -0700)]
poweroff: change orderly_poweroff() to use schedule_work()

David said:

    Commit 6c0c0d4d1080 ("poweroff: fix bug in orderly_poweroff()")
    apparently fixes one bug in orderly_poweroff(), but introduces
    another.  The comments on orderly_poweroff() claim it can be called
    from any context - and indeed we call it from interrupt context in
    arch/powerpc/platforms/pseries/ras.c for example.  But since that
    commit this is no longer safe, since call_usermodehelper_fns() is not
    safe in interrupt context without the UMH_NO_WAIT option.

orderly_poweroff() can be used from any context but UMH_WAIT_EXEC is
sleepable.  Move the "force" logic into __orderly_poweroff() and change
orderly_poweroff() to use the global poweroff_work which simply calls
__orderly_poweroff().

While at it, remove the unneeded "int argc" and change argv_split() to
use GFP_KERNEL.

We use the global "bool poweroff_force" to pass the argument, this can
obviously affect the previous request if it is pending/running.  So we
only allow the "false => true" transition assuming that the pending
"true" should succeed anyway.  If schedule_work() fails after that we
know that work->func() was not called yet, it must see the new value.

This means that orderly_poweroff() becomes async even if we do not run
the command and always succeeds, schedule_work() can only fail if the
work is already pending.  We can export __orderly_poweroff() and change
the non-atomic callers which want the old semantics.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reported-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Feng Hong <hongfeng@marvell.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting
Wanpeng Li [Fri, 22 Mar 2013 22:04:40 +0000 (15:04 -0700)]
mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting

hugetlb_total_pages is used for overcommit calculations but the current
implementation considers only the default hugetlb page size (which is
either the first defined hugepage size or the one specified by
default_hugepagesz kernel boot parameter).

If the system is configured for more than one hugepage size, which is
possible since commit a137e1cc6d6e ("hugetlbfs: per mount huge page
sizes") then the overcommit estimation done by __vm_enough_memory()
(resp.  shown by meminfo_proc_show) is not precise - there is an
impression of more available/allowed memory.  This can lead to an
unexpected ENOMEM/EFAULT resp.  SIGSEGV when memory is accounted.

Testcase:
  boot: hugepagesz=1G hugepages=1
  the default overcommit ratio is 50
  before patch:

    egrep 'CommitLimit' /proc/meminfo
    CommitLimit:     55434168 kB

  after patch:

    egrep 'CommitLimit' /proc/meminfo
    CommitLimit:     54909880 kB

[akpm@linux-foundation.org: coding-style tweak]
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@vger.kernel.org> [3.0+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoprintk: Provide a wake_up_klogd() off-case
Frederic Weisbecker [Fri, 22 Mar 2013 22:04:39 +0000 (15:04 -0700)]
printk: Provide a wake_up_klogd() off-case

wake_up_klogd() is useless when CONFIG_PRINTK=n because neither printk()
nor printk_sched() are in use and there are actually no waiter on
log_wait waitqueue.  It should be a stub in this case for users like
bust_spinlocks().

Otherwise this results in this warning when CONFIG_PRINTK=n and
CONFIG_IRQ_WORK=n:

kernel/built-in.o In function `wake_up_klogd':
(.text.wake_up_klogd+0xb4): undefined reference to `irq_work_queue'

To fix this, provide an off-case for wake_up_klogd() when
CONFIG_PRINTK=n.

There is much more from console_unlock() and other console related code
in printk.c that should be moved under CONFIG_PRINTK.  But for now,
focus on a minimal fix as we passed the merged window already.

[akpm@linux-foundation.org: include printk.h in bust_spinlocks.c]
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reported-by: James Hogan <james.hogan@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoirq_work.h: fix warning when CONFIG_IRQ_WORK=n
James Hogan [Fri, 22 Mar 2013 22:04:37 +0000 (15:04 -0700)]
irq_work.h: fix warning when CONFIG_IRQ_WORK=n

A randconfig caught repeated compiler warnings when CONFIG_IRQ_WORK=n
due to the definition of a non-inline static function in
<linux/irq_work.h>:

  include/linux/irq_work.h +40 : warning: 'irq_work_needs_cpu' defined but not used

Make it inline to supress the warning.  This is caused commit
00b42959106a ("irq_work: Don't stop the tick with pending works") merged
in v3.9-rc1.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agowatchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2
Takahisa Tanaka [Sun, 3 Mar 2013 05:48:00 +0000 (14:48 +0900)]
watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2

The AcpiMmioSel bit is bit 1 in the AcpiMmioEn register, but the current
sp5100_tco driver is using bit 2.

See 2.3.3 Power Management (PM) Registers page 150 of the
AMD SB800-Series Southbridges Register Reference Guide [1].

        AcpiMmioEn - RW â€“ 8/16/32 bits - [PM_Reg: 24h]
        Field Name        Bits  Default  Description
        AcpiMMioDecodeEn  0     0b       Set to 1 to enable AcpiMMio space.
        AcpiMMIoSel       1     0b       Set AcpiMMio registers to be memory-mapped or IO-mapped space.
                                         0: Memory-mapped space
                                         1: I/O-mapped space

The sp5100_tco driver expects zero as a value of AcpiMmioSel (bit 1).

Fortunately, no problems were caused by this typo, because the default
value of the undocumented misused bit 2 seems to be zero.

However, the sp5100_tco driver should use the correct bitmask value.

[1] http://support.amd.com/us/Embedded_TechDocs/45482.pdf

Signed-off-by: Takahisa Tanaka <mc74hc00@gmail.com>
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>
11 years agowatchdog: sp5100_tco: Remove code that may cause a boot failure
Takahisa Tanaka [Sun, 3 Mar 2013 05:52:07 +0000 (14:52 +0900)]
watchdog: sp5100_tco: Remove code that may cause a boot failure

A problem was found on PC's with the SB700 chipset: The PC fails to
load BIOS after running the 3.8.x kernel until the power is completely
cut off. It occurs in all 3.8.x versions and the mainline version as of
2/4. The issue does not occur with the 3.7.x builds.

There are two methods for accessing the watchdog registers.

 1. Re-programming a resource address obtained by allocate_resource()
to chipset.
 2. Use the direct memory-mapped IO access.

The method 1 can be used by all the chipsets (SP5100, SB7x0, SB8x0 or
later). However, experience shows that only PC with the SB8x0 (or
later) chipsets can use the method 2.

This patch removes the method 1, because the critical problem was found.
That's why the watchdog timer was able to be used on SP5100 and SB7x0
chipsets until now.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1116835
Link: https://lkml.org/lkml/2013/2/14/271
Signed-off-by: Takahisa Tanaka <mc74hc00@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>
11 years agoMAINTAINERS: update email address for Kevin Hilman
Kevin Hilman [Wed, 28 Nov 2012 23:46:45 +0000 (15:46 -0800)]
MAINTAINERS: update email address for Kevin Hilman

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
11 years agonfsd: fix bad offset use
Kent Overstreet [Fri, 22 Mar 2013 18:18:24 +0000 (11:18 -0700)]
nfsd: fix bad offset use

vfs_writev() updates the offset argument - but the code then passes the
offset to vfs_fsync_range(). Since offset now points to the offset after
what was just written, this is probably not what was intended

Introduced by face15025ffdf664de95e86ae831544154d26c9c "nfsd: use
vfs_fsync_range(), not O_SYNC, for stable writes".

Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: stable@vger.kernel.org
Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
11 years agoARM: tegra: fix register address of slink controller
Laxman Dewangan [Fri, 22 Mar 2013 18:35:06 +0000 (12:35 -0600)]
ARM: tegra: fix register address of slink controller

Fix typo on register address of slink3 controller where register
address is wrongly set as 0x7000d480 but it is 0x7000d800.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
11 years agoefivars: Fix check for CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE
Ben Hutchings [Fri, 22 Mar 2013 19:56:51 +0000 (19:56 +0000)]
efivars: Fix check for CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE

The 'CONFIG_' prefix is not implicit in IS_ENABLED().

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Seth Forshee <seth.forshee@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
11 years agoMerge git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 22 Mar 2013 19:57:30 +0000 (12:57 -0700)]
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fix from Marcelo Tosatti:
 "Fix compilation on PPC with !CONFIG_KVM"

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  Revert "KVM: allow host header to be included even for !CONFIG_KVM"

11 years agoMerge tag 'usb-3.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Fri, 22 Mar 2013 19:45:55 +0000 (12:45 -0700)]
Merge tag 'usb-3.9-rc3' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg Kroah-Hartman:
 "Here are a number of USB fixes that resolve issues that have been
  reported against 3.9-rc3."

* tag 'usb-3.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (37 commits)
  USB: ti_usb_3410_5052: fix use-after-free in TIOCMIWAIT
  USB: ssu100: fix use-after-free in TIOCMIWAIT
  USB: spcp8x5: fix use-after-free in TIOCMIWAIT
  USB: quatech2: fix use-after-free in TIOCMIWAIT
  USB: pl2303: fix use-after-free in TIOCMIWAIT
  USB: oti6858: fix use-after-free in TIOCMIWAIT
  USB: mos7840: fix use-after-free in TIOCMIWAIT
  USB: mos7840: fix broken TIOCMIWAIT
  USB: mct_u232: fix use-after-free in TIOCMIWAIT
  USB: io_ti: fix use-after-free in TIOCMIWAIT
  USB: io_edgeport: fix use-after-free in TIOCMIWAIT
  USB: ftdi_sio: fix use-after-free in TIOCMIWAIT
  USB: f81232: fix use-after-free in TIOCMIWAIT
  USB: cypress_m8: fix use-after-free in TIOCMIWAIT
  USB: ch341: fix use-after-free in TIOCMIWAIT
  USB: ark3116: fix use-after-free in TIOCMIWAIT
  USB: serial: add modem-status-change wait queue
  USB: serial: fix interface refcounting
  USB: io_ti: fix get_icount for two port adapters
  USB: garmin_gps: fix memory leak on disconnect
  ...

11 years agoMerge tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Fri, 22 Mar 2013 19:45:08 +0000 (12:45 -0700)]
Merge tag 'sound-3.9' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Mostly HD-audio and USB-audio regression fixes:
   - Oops fix at unloading of snd-hda-codec-conexant module
   - A few trivial regression fixes for Cirrus and Conexant HD-audio
     codecs
   - Relax the USB-audio descriptor parse errors as non-fatal
   - Fix locking of HD-audio CA0132 DSP loader
   - Fix the generic HD-audio parser for VIA codecs"

* tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix DAC assignment for independent HP
  ALSA: hda - Fix abuse of snd_hda_lock_devices() for DSP loader
  ALSA: hda - Fix typo in checking IEC958 emphasis bit
  ALSA: snd-usb: mixer: ignore -EINVAL in snd_usb_mixer_controls()
  ALSA: snd-usb: mixer: propagate errors up the call chain
  ALSA: usb: Parse UAC2 extension unit like for UAC1
  ALSA: hda - Fix yet missing GPIO/EAPD setup in cirrus driver
  ALSA: hda/cirrus - Fix the digital beep registration
  ALSA: hda - Fix missing beep detach in patch_conexant.c
  ALSA: documentation: Fix typo in Documentation/sound

11 years agoMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
Linus Torvalds [Fri, 22 Mar 2013 19:44:22 +0000 (12:44 -0700)]
Merge tag 'for_linus' of git://git./linux/kernel/git/bp/bp

Pull EDAC fixes from Borislav Petkov:
 "A fix from Mauro to correct csrow size accounting in sysfs and a
  sparse fix from Stephen Hemminger."

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC: Merge mci.mem_is_per_rank with mci.csbased
  amd64_edac: Correct DIMM sizes
  EDAC: Make sysfs functions static

11 years agoNVMe: Add namespaces with no LBA range feature
Keith Busch [Thu, 31 Jan 2013 21:40:38 +0000 (14:40 -0700)]
NVMe: Add namespaces with no LBA range feature

The LBA Range Type feature is optional in the NVMe specification,
so we should continue with adding namespaces for controllers that do
not implement this feature.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agovfs,proc: guarantee unique inodes in /proc
Linus Torvalds [Fri, 22 Mar 2013 18:44:04 +0000 (11:44 -0700)]
vfs,proc: guarantee unique inodes in /proc

Dave Jones found another /proc issue with his Trinity tool: thanks to
the namespace model, we can have multiple /proc dentries that point to
the same inode, aliasing directories in /proc/<pid>/net/ for example.

This ends up being a total disaster, because it acts like hardlinked
directories, and causes locking problems.  We rely on the topological
sort of the inodes pointed to by dentries, and if we have aliased
directories, that odering becomes unreliable.

In short: don't do this.  Multiple dentries with the same (directory)
inode is just a bad idea, and the namespace code should never have
exposed things this way.  But we're kind of stuck with it.

This solves things by just always allocating a new inode during /proc
dentry lookup, instead of using "iget_locked()" to look up existing
inodes by superblock and number.  That actually simplies the code a bit,
at the cost of potentially doing more inode [de]allocations.

That said, the inode lookup wasn't free either (and did a lot of locking
of inodes), so it is probably not that noticeable.  We could easily keep
the old lookup model for non-directory entries, but rather than try to
be excessively clever this just implements the minimal and simplest
workaround for the problem.

Reported-and-tested-by: Dave Jones <davej@redhat.com>
Analyzed-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoRevert "KVM: allow host header to be included even for !CONFIG_KVM"
Marcelo Tosatti [Fri, 22 Mar 2013 11:08:06 +0000 (08:08 -0300)]
Revert "KVM: allow host header to be included even for !CONFIG_KVM"

This reverts commit f445f11eb2cc265dd47da5b2e864df46cd6e5a82 as
it breaks PPC with CONFIG_KVM=n.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
11 years agoMAINTAINERS: add maintainer entry for atmel i2c driver
Ludovic Desroches [Fri, 15 Mar 2013 05:32:57 +0000 (05:32 +0000)]
MAINTAINERS: add maintainer entry for atmel i2c driver

Create an entry for atmel i2c driver: i2c-at91.c

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
11 years agoi2c: Fix my e-mail address in drivers and documentation
Guenter Roeck [Tue, 26 Feb 2013 06:03:52 +0000 (06:03 +0000)]
i2c: Fix my e-mail address in drivers and documentation

My old e-mail address is no longer working.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
11 years agoi2c: iSMT: add Intel Avoton DeviceIDs
Seth Heasley [Thu, 21 Feb 2013 12:30:43 +0000 (12:30 +0000)]
i2c: iSMT: add Intel Avoton DeviceIDs

This patch adds the iSMT SMBus Controller DeviceIDs for the Intel Avoton SOC.

Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
11 years agoi2c: tegra: check the clk_prepare_enable() return value
Laxman Dewangan [Fri, 15 Mar 2013 05:34:08 +0000 (05:34 +0000)]
i2c: tegra: check the clk_prepare_enable() return value

NVIDIA's Tegra SoC allows read/write of controller register only
if controller clock is enabled. System hangs if read/write happens
to registers without enabling clock.

clk_prepare_enable() can be fail due to unknown reason and hence
adding check for return value of this function. If this function
success then only access register otherwise return to caller with
error.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
11 years agoMerge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 22 Mar 2013 00:59:22 +0000 (17:59 -0700)]
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull CIFS fixes from Steve French:
 "Three small CIFS Fixes (the most important of the three fixes a recent
  problem authenticating to Windows 8 using cifs rather than SMB2)"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: ignore everything in SPNEGO blob after mechTypes
  cifs: delay super block destruction until all cifsFileInfo objects are gone
  cifs: map NT_STATUS_SHARING_VIOLATION to EBUSY instead of ETXTBSY

11 years agoMerge tag 'ext4_for_linue' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
Linus Torvalds [Fri, 22 Mar 2013 00:56:10 +0000 (17:56 -0700)]
Merge tag 'ext4_for_linue' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Fix a number of regression and other bugs in ext4, most of which were
  relatively obscure cornercases or races that were found using
  regression tests."

* tag 'ext4_for_linue' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (21 commits)
  ext4: fix data=journal fast mount/umount hang
  ext4: fix ext4_evict_inode() racing against workqueue processing code
  ext4: fix memory leakage in mext_check_coverage
  ext4: use s_extent_max_zeroout_kb value as number of kb
  ext4: use atomic64_t for the per-flexbg free_clusters count
  jbd2: fix use after free in jbd2_journal_dirty_metadata()
  ext4: reserve metadata block for every delayed write
  ext4: update reserved space after the 'correction'
  ext4: do not use yield()
  ext4: remove unused variable in ext4_free_blocks()
  ext4: fix WARN_ON from ext4_releasepage()
  ext4: fix the wrong number of the allocated blocks in ext4_split_extent()
  ext4: update extent status tree after an extent is zeroed out
  ext4: fix wrong m_len value after unwritten extent conversion
  ext4: add self-testing infrastructure to do a sanity check
  ext4: avoid a potential overflow in ext4_es_can_be_merged()
  ext4: invalidate extent status tree during extent migration
  ext4: remove unnecessary wait for extent conversion in ext4_fallocate()
  ext4: add warning to ext4_convert_unwritten_extents_endio
  ext4: disable merging of uninitialized extents
  ...

11 years agoMerge tag 'efi-for-3.9-rc3' into x86/urgent
H. Peter Anvin [Fri, 22 Mar 2013 00:40:10 +0000 (17:40 -0700)]
Merge tag 'efi-for-3.9-rc3' into x86/urgent

EFI changes for v3.9-rc3,

  * A new config option and efivars module parameter have been added to
    allow the efivars pstore backend to be disabled as we're still seeing
    issues on machines despite adding heuristics to workaround known bugs.
    Distributions now have a way to disable EFI variable pstore code
    completely - from Seth Forshee.

  * A couple of efivars patches to workaround quirky implementations
    of GetNextVariableName() which resulted in machines hanging and
    sysfs files being created with garbage names.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
11 years agox86, microcode_intel_early: Mark apply_microcode_early() as cpuinit
H. Peter Anvin [Fri, 22 Mar 2013 00:32:36 +0000 (17:32 -0700)]
x86, microcode_intel_early: Mark apply_microcode_early() as cpuinit

Add missing __cpuinit annotation to apply_microcode_early().

Reported-by: Shaun Ruffell <sruffell@digium.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/20130320170310.GA23362@digium.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
11 years agoUSB: ti_usb_3410_5052: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:26 +0000 (09:21 +0100)]
USB: ti_usb_3410_5052: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: ssu100: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:25 +0000 (09:21 +0100)]
USB: ssu100: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: spcp8x5: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:24 +0000 (09:21 +0100)]
USB: spcp8x5: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: quatech2: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:23 +0000 (09:21 +0100)]
USB: quatech2: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: pl2303: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:22 +0000 (09:21 +0100)]
USB: pl2303: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: oti6858: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:21 +0000 (09:21 +0100)]
USB: oti6858: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: mos7840: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:20 +0000 (09:21 +0100)]
USB: mos7840: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: mos7840: fix broken TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:19 +0000 (09:21 +0100)]
USB: mos7840: fix broken TIOCMIWAIT

Make sure waiting processes are woken on modem-status changes.

Currently processes are only woken on termios changes regardless of
whether the modem status has changed.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: mct_u232: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:18 +0000 (09:21 +0100)]
USB: mct_u232: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: io_ti: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:17 +0000 (09:21 +0100)]
USB: io_ti: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: io_edgeport: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:16 +0000 (09:21 +0100)]
USB: io_edgeport: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: ftdi_sio: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:15 +0000 (09:21 +0100)]
USB: ftdi_sio: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

When switching to tty ports, some lifetime assumptions were changed.
Specifically, close can now be called before the final tty reference is
dropped as part of hangup at device disconnect. Even with the ftdi
private-data refcounting this means that the port private data can be
freed while a process is sleeping on modem-status changes and thus
cannot be relied on to detect disconnects when woken up.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: f81232: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:14 +0000 (09:21 +0100)]
USB: f81232: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: cypress_m8: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:13 +0000 (09:21 +0100)]
USB: cypress_m8: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Also remove bogus test for private data pointer being NULL as it is
never assigned in the loop.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: ch341: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:12 +0000 (09:21 +0100)]
USB: ch341: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: ark3116: fix use-after-free in TIOCMIWAIT
Johan Hovold [Tue, 19 Mar 2013 08:21:11 +0000 (09:21 +0100)]
USB: ark3116: fix use-after-free in TIOCMIWAIT

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: serial: add modem-status-change wait queue
Johan Hovold [Tue, 19 Mar 2013 08:21:10 +0000 (09:21 +0100)]
USB: serial: add modem-status-change wait queue

Add modem-status-change wait queue to struct usb_serial_port that
subdrivers can use to implement TIOCMIWAIT.

Currently subdrivers use a private wait queue which may have been
released when waking up after device disconnected.

Note that we're adding a new wait queue rather than reusing the tty-port
one as we do not want to get woken up at hangup (yet).

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: serial: fix interface refcounting
Johan Hovold [Tue, 19 Mar 2013 08:21:09 +0000 (09:21 +0100)]
USB: serial: fix interface refcounting

Make sure the interface is not released before our serial device.

Note that drivers are still not allowed to access the interface in
any way that may interfere with another driver that may have gotten
bound to the same interface after disconnect returns.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: io_ti: fix get_icount for two port adapters
Johan Hovold [Tue, 19 Mar 2013 08:21:08 +0000 (09:21 +0100)]
USB: io_ti: fix get_icount for two port adapters

Add missing get_icount field to two-port driver.

The two-port driver was not updated when switching to the new icount
interface in commit 0bca1b913aff ("tty: Convert the USB drivers to the
new icount interface").

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: garmin_gps: fix memory leak on disconnect
Johan Hovold [Tue, 19 Mar 2013 08:21:07 +0000 (09:21 +0100)]
USB: garmin_gps: fix memory leak on disconnect

Remove bogus disconnect test introduced by 95bef012e ("USB: more serial
drivers writing after disconnect") which prevented queued data from
being freed on disconnect.

The possible IO it was supposed to prevent is long gone.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: cdc-acm: fix device unregistration
Johan Hovold [Tue, 19 Mar 2013 08:21:06 +0000 (09:21 +0100)]
USB: cdc-acm: fix device unregistration

Unregister tty device in disconnect as is required by the USB stack.

By deferring unregistration to when the last tty reference is dropped,
the parent interface device can get unregistered before the child
resulting in broken hotplug events being generated when the tty is
finally closed:

KERNEL[2290.798128] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1:3.1 (usb)
KERNEL[2290.804589] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-1 (usb)
KERNEL[2294.554799] remove   /2-1:3.1/tty/ttyACM0 (tty)

The driver must deal with tty callbacks after disconnect by checking the
disconnected flag. Specifically, further opens must be prevented and
this is already implemented.

Cc: stable <stable@vger.kernel.org>
Cc: Oliver Neukum <oneukum@suse.de>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agousb: cdc-acm: fix error handling in acm_probe()
Alexey Khoroshilov [Fri, 15 Mar 2013 21:30:32 +0000 (01:30 +0400)]
usb: cdc-acm: fix error handling in acm_probe()

acm_probe() ignores errors in tty_port_register_device()
and leaves intfdata pointing to freed memory on alloc_fail7
error path. The patch fixes the both issues.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>