Commit Graph

548145 Commits

Author SHA1 Message Date
Dave Airlie
04ccb89073 Merge branch 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
regression fix for backlight on old laptops.

* 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: fix dpms when driver backlight control is disabled
  drm/radeon: move bl encoder assignment into bl init
2015-10-30 09:32:59 +10:00
Alex Deucher
ae93580ee5 drm/radeon: fix dpms when driver backlight control is disabled
If driver backlight control is disabled, either by driver
parameter or default per-asic setting, revert to the old behavior.

Fixes a regression in commit:
4281f46ef8

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2015-10-29 11:13:40 -04:00
Alex Deucher
4cee6a9057 drm/radeon: move bl encoder assignment into bl init
So that the bl encoder will be null if the GPU does not
control the backlight.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2015-10-29 11:13:18 -04:00
Linus Torvalds
8a28d67457 powerpc fixes for 4.3 #5
- powerpc/dma: dma_set_coherent_mask() should not be GPL only from Ben
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Merge tag 'powerpc-4.3-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 - powerpc/dma: dma_set_coherent_mask() should not be GPL only from Ben

* tag 'powerpc-4.3-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/dma: dma_set_coherent_mask() should not be GPL only
2015-10-28 18:59:53 +09:00
Benjamin Herrenschmidt
977bf062bb powerpc/dma: dma_set_coherent_mask() should not be GPL only
When turning this from inline to an exported function I was a bit
over-eager and made it GPL only. This prevents the use of pretty much
all non-GPL PCI driver which is a bit over the top. Let's bring it
back in line with other architecture.

Fixes: 817820b022 ("powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask")
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-10-28 14:20:50 +09:00
Ming Lin
a22c4d7e34 block: re-add discard_granularity and alignment checks
In commit b49a087("block: remove split code in
blkdev_issue_{discard,write_same}"), discard_granularity and alignment
checks were removed. Ideally, with bio late splitting, the upper layers
shouldn't need to depend on device's limits.

Christoph reported a discard regression on the HGST Ultrastar SN100 NVMe
device when mkfs.xfs. We have not found the root cause yet.

This patch re-adds discard_granularity and alignment checks by reverting
the related changes in commit b49a087. The good thing is now we can
remove the 2G discard size cap and just use UINT_MAX to avoid bi_size
overflow.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2015-10-28 09:12:58 +09:00
Linus Torvalds
23d88271b4 Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "Two fixes for ARM and one for clkdev:

   - Fix another build issue with vdsomunge on non-glibc systems
   - Fix a randconfig build error caused by an invalid configuration
   - Fix a clkdev problem causing the Nokia n700 to no longer boot"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  clkdev: fix clk_add_alias() with a NULL alias device name
  ARM: 8445/1: fix vdsomunge not to depend on glibc specific byteswap.h
  ARM: make RiscPC depend on MMU
2015-10-28 07:24:53 +09:00
Linus Torvalds
3d0aa36607 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull blkcg fix from Jens Axboe:
 "One final fix that should go into 4.3.  It's a simple 2x1 liner,
  fixing a blkcg accounting issue.  It was using the wrong bio member to
  look at the sync and write bits..."

* 'for-linus' of git://git.kernel.dk/linux-block:
  blkcg: fix incorrect read/write sync/async stat accounting
2015-10-28 07:22:15 +09:00
Linus Torvalds
dc5bc3f1e3 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu:
 "This fixes a problem in the Crypto API that may cause spurious errors
  when signals are received by the process that made the orignal system
  call into the kernel"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: api - Only abort operations on fatal signal
2015-10-28 07:20:10 +09:00
Linus Torvalds
9e17f90702 Turns out we should have always been disabling preemption here;
someone finally caught it thanks to Peter Z's additional checks.
 
 Cheers,
 Rusty.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull module preemption fix from Rusty Russell:
 "Turns out we should have always been disabling preemption here;
  someone finally caught it thanks to Peter Z's additional checks"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  module: Fix locking in symbol_put_addr()
2015-10-28 07:17:50 +09:00
Tejun Heo
174fd8d369 blkcg: fix incorrect read/write sync/async stat accounting
While unifying how blkcg stats are collected, 77ea733884 ("blkcg:
move io_service_bytes and io_serviced stats into blkcg_gq")
incorrectly used bio->flags instead of bio->rw to tell the IO type.
This made IOs to be accounted as the wrong type.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 77ea733884 ("blkcg: move io_service_bytes and io_serviced stats into blkcg_gq")
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2015-10-27 15:04:56 +09:00
Linus Torvalds
858e904bd7 IOMMU Fixes for Linux v4.3-rc7
Two late fixes for the AMD IOMMU driver:
 
 	* One adds an additional check to the io page-fault handler to
 	  avoid a BUG_ON being hit in handle_mm_fault()
 
 	* Second patch fixes a problem with devices writing to the
 	  system management area and were blocked by the IOMMU because
 	  the driver wrongly cleared out the DTE flags allowing that
 	  access.
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Merge tag 'iommu-fixes-v4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:
 "Two late fixes for the AMD IOMMU driver:

   - add an additional check to the io page-fault handler to avoid a
     BUG_ON being hit in handle_mm_fault()

   - fix a problem with devices writing to the system management area
     and were blocked by the IOMMU because the driver wrongly cleared
     out the DTE flags allowing that access"

* tag 'iommu-fixes-v4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Don't clear DTE flags when modifying it
  iommu/amd: Fix BUG when faulting a PROT_NONE VMA
2015-10-27 07:44:13 +09:00
Linus Torvalds
ce6f988603 Some raid1/raid10 fixes.
Two fixes for bugs that are in both raid1 and raid10.
 Both related to bad-block-lists and at least one needs
 to be back ported to 3.1.
 
 Also a revision for the "new" layout in raid10.
 This "new" code (which aims to improve robustness) actually
 reduces robustness in some cases.
 It probably isn't in use at all as not public user-space code
 makes use of these new layouts.
 However just in case someone has their own code, it would be
 good to get the WARNing out for them sooner.
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Merge tag 'md/4.3-rc6-fixes' of git://neil.brown.name/md

Pull md fixes from Neil Brown:
 "Some raid1/raid10 fixes.

  I meant to get this to you before -rc7, but what with all the travel
  plans..

  Two fixes for bugs that are in both raid1 and raid10.  Both related to
  bad-block-lists and at least one needs to be back ported to 3.1.

  Also a revision for the "new" layout in raid10.  This "new" code
  (which aims to improve robustness) actually reduces robustness in some
  cases.  It probably isn't in use at all as not public user-space code
  makes use of these new layouts.  However just in case someone has
  their own code, it would be good to get the WARNing out for them
  sooner"

* tag 'md/4.3-rc6-fixes' of git://neil.brown.name/md:
  md/raid10: fix the 'new' raid10 layout to work correctly.
  md/raid10: don't clear bitmap bit when bad-block-list write fails.
  md/raid1: don't clear bitmap bit when bad-block-list write fails.
  md/raid10: submit_bio_wait() returns 0 on success
  md/raid1: submit_bio_wait() returns 0 on success
2015-10-27 07:41:48 +09:00
Linus Torvalds
896066ee1c Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Last fixes from me: one amdgpu/radeon suspend resume and one leak fix,
  along with one vmware fix for some issues when command submission
  fails"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/amdgpu: don't try to recreate sysfs entries on resume
  drm/radeon: don't try to recreate sysfs entries on resume
  drm/amdgpu: stop leaking page flip fence
  drm/vmwgfx: Stabilize the command buffer submission code
2015-10-27 07:40:01 +09:00
Linus Torvalds
85051e295f Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
 "Two driver bugfixes for the I2C subsystem"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: pnx: fix runtime warnings caused by enabling unprepared clock
  i2c: mv64xxx: really allow I2C offloading
2015-10-26 12:29:16 +09:00
Linus Torvalds
32b88194f7 Linux 4.3-rc7 2015-10-25 10:39:47 +09:00
Dave Airlie
22ca7ca52e Merge branch 'vmwgfx-fixes-4.3' of git://people.freedesktop.org/~thomash/linux
I'm not sure whether this patch comes in too late, but it would be good to
have it in. It stabilizes command submission in case of command buffer errors.

* 'vmwgfx-fixes-4.3' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Stabilize the command buffer submission code
2015-10-25 05:02:33 +10:00
Dave Airlie
aef8cc9035 Merge branch 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux
Two regression fixes and a memory leak fix for amdgpu and radeon.

* 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux:
  drm/amdgpu: don't try to recreate sysfs entries on resume
  drm/radeon: don't try to recreate sysfs entries on resume
  drm/amdgpu: stop leaking page flip fence
2015-10-25 05:01:57 +10:00
NeilBrown
8bce6d35b3 md/raid10: fix the 'new' raid10 layout to work correctly.
In Linux 3.9 we introduce a new 'far' layout for RAID10 which was
supposed to rotate the replicas differently and so provide better
resilience.  In particular it could survive more combinations of 2
drive failures.

Unfortunately. due to a coding error, this some did what was wanted,
sometimes improved less than we hoped, and sometimes - in very
unlikely circumstances - put multiple replicas on the same device so
the redundancy was harmed.

No public user-space tool has created arrays using this layout so it
is very unlikely that zero-redundancy arrays actually exist.  Probably
no arrays using any form of the new layout exist.  But we cannot be
certain.

So use another bit in the 'layout' number and introduce a bug-fixed
version of the layout.
Also when assembling an array, if it has a zero-redundancy layout,
give a warning.

Reported-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
2015-10-24 16:24:25 +11:00
NeilBrown
c340702ca2 md/raid10: don't clear bitmap bit when bad-block-list write fails.
When a write fails and a bad-block-list is present, we can
update the bad-block-list instead of writing the data.  If
this succeeds then it is OK clear the relevant bitmap-bit as
no further 'sync' of the block is needed.

However if writing the bad-block-list fails then we need to
treat the write as failed and particularly must not clear
the bitmap bit.  Otherwise the device can be re-added (after
any hardware connection issues are resolved) and because the
relevant bit in the bitmap is clear, that block will not be
resynced.  This leads to data corruption.

We already delay the final bio_endio() on the write until
the bad-block-list is written so that when the write
returns: either that data is safe, the bad-block record is
safe, or the fact that the device is faulty is safe.
However we *don't* delay the clearing of the bitmap, so the
bitmap bit can be recorded as cleared before we know if the
bad-block-list was written safely.

So: delay that until the write really is safe.
i.e. move the call to close_write() until just before
calling bio_endio(), and recheck the 'is array degraded'
status before making that call.

This bug goes back to v3.1 when bad-block-lists were
introduced, though it only affects arrays created with
mdadm-3.3 or later as only those have bad-block lists.

Backports will require at least
Commit: 95af587e95 ("md/raid10: ensure device failure recorded before write request returns.")
as well.  I'll send that to 'stable' separately.

Note that of the two tests of R10BIO_WriteError that this
patch adds, the first is certain to fail and the second is
certain to succeed.  However doing it this way makes the
patch more obviously correct.  I will tidy the code up in a
future merge window.

Reported-by: Nate Dailey <nate.dailey@stratus.com>
Fixes: bd870a16c5 ("md/raid10:  Handle write errors by updating badblock log.")
Signed-off-by: NeilBrown <neilb@suse.com>
2015-10-24 16:24:23 +11:00
NeilBrown
bd8688a199 md/raid1: don't clear bitmap bit when bad-block-list write fails.
When a write fails and a bad-block-list is present, we can
update the bad-block-list instead of writing the data.  If
this succeeds then it is OK clear the relevant bitmap-bit as
no further 'sync' of the block is needed.

However if writing the bad-block-list fails then we need to
treat the write as failed and particularly must not clear
the bitmap bit.  Otherwise the device can be re-added (after
any hardware connection issues are resolved) and because the
relevant bit in the bitmap is clear, that block will not be
resynced.  This leads to data corruption.

We already delay the final bio_endio() on the write until
the bad-block-list is written so that when the write
returns: either that data is safe, the bad-block record is
safe, or the fact that the device is faulty is safe.
However we *don't* delay the clearing of the bitmap, so the
bitmap bit can be recorded as cleared before we know if the
bad-block-list was written safely.

So: delay that until the write really is safe.
i.e. move the call to close_write() until just before
calling bio_endio(), and recheck the 'is array degraded'
status before making that call.

This bug goes back to v3.1 when bad-block-lists were
introduced, though it only affects arrays created with
mdadm-3.3 or later as only those have bad-block lists.

Backports will require at least
Commit: 55ce74d4bf ("md/raid1: ensure device failure recorded before write request returns.")
as well.  I'll send that to 'stable' separately.

Note that of the two tests of R1BIO_WriteError that this
patch adds, the first is certain to fail and the second is
certain to succeed.  However doing it this way makes the
patch more obviously correct.  I will tidy the code up in a
future merge window.

Reported-and-tested-by: Nate Dailey <nate.dailey@stratus.com>
Cc: Jes Sorensen <Jes.Sorensen@redhat.com>
Fixes: cd5ff9a16f ("md/raid1:  Handle write errors by updating badblock log.")
Signed-off-by: NeilBrown <neilb@suse.com>
2015-10-24 16:24:22 +11:00
Linus Torvalds
018155365d USB fixes for 4.3-rc7
Here are 3 xhci driver fixes for reported issues for 4.3-rc7
 
 All have been in linux-next for a while with no problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are three xhci driver fixes for reported issues for 4.3-rc7

  All have been in linux-next for a while with no problems"

* tag 'usb-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  xhci: Add spurious wakeup quirk for LynxPoint-LP controllers
  xhci: handle no ping response error properly
  xhci: don't finish a TD if we get a short transfer event mid TD
2015-10-24 07:52:59 +09:00
Linus Torvalds
dd5ae6818c tty/serial fixes for 4.3-rc7
Here are two fixes that resolve reported issues, one with the 8250
 driver, and the other with the generic fbcon driver.
 
 Both have been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are two fixes that resolve reported issues, one with the 8250
  driver, and the other with the generic fbcon driver.

  Both have been in linux-next for a while"

* tag 'tty-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  fbcon: initialize blink interval before calling fb_set_par
  Revert "serial: 8250_dma: don't bother DMA with small transfers"
2015-10-24 07:52:09 +09:00
Linus Torvalds
4ee8019d3f staging driver fixes for 4.3-rc7
Here are 4 iio driver fixes for 4.3-rc7, fixing some reported issues.
 All of these have been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver fixes from Greg KH:
 "Here are four iio driver fixes for 4.3-rc7, fixing some reported
  issues.  All of these have been in linux-next for a while"

* tag 'staging-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: mxs-lradc: Fix temperature offset
  iio: accel: sca3000: memory corruption in sca3000_read_first_n_hw_rb()
  iio: st_accel: fix interrupt handling on LIS3LV02
  iio: adc: twl4030: Fix ADC[3:6] readings
2015-10-24 07:51:13 +09:00
Linus Torvalds
410694e214 Changes for 4.3-rc6
6 serious fixes:
 
 1) Hold the mutex around the find and corresponding update of our gid
 2) The ifa list is rcu protected, copy its contents under rcu to avoid
    using a freed structure
 3) On error, netdev might be null, so check it before trying to release it
 4) On init, if workqueue alloc fails, fail init
 5) The new demux patches exposed a bug in mlx5 and ipath drivers, we need
    to use the payload P_Key to determine the P_Key the packet arrived on
    because the hardware doesn't tell us the truth
 6) Due to a couple convoluted error flows, it is possible for the CM to
    trigger a use_after_free and a double_free of rb nodes.  Add two
    checks to prevent that.  This code has worked for 10+ years.  It is
    likely that some of the recent changes have caused this issue to
    surface.  The current patch will protect us from nasty events for
    now while we track down why this is just now showing up.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull infiniband fixes from Doug Ledford:
 "It's late in the game, I know, but these fixes seemed important enough
  to warrant a late pull request.  They all involve oopses or use after
  frees or corruptions.

  Six serious fixes:

   - Hold the mutex around the find and corresponding update of our gid

   - The ifa list is rcu protected, copy its contents under rcu to avoid
     using a freed structure

   - On error, netdev might be null, so check it before trying to
     release it

   - On init, if workqueue alloc fails, fail init

   - The new demux patches exposed a bug in mlx5 and ipath drivers, we
     need to use the payload P_Key to determine the P_Key the packet
     arrived on because the hardware doesn't tell us the truth

   - Due to a couple convoluted error flows, it is possible for the CM
     to trigger a use_after_free and a double_free of rb nodes.  Add two
     checks to prevent that.  This code has worked for 10+ years.  It is
     likely that some of the recent changes have caused this issue to
     surface.  The current patch will protect us from nasty events for
     now while we track down why this is just now showing up"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/cm: Fix rb-tree duplicate free and use-after-free
  IB/cma: Use inner P_Key to determine netdev
  IB/ucma: check workqueue allocation before usage
  IB/cma: Potential NULL dereference in cma_id_from_event
  IB/core: Fix use after free of ifa
  IB/core: Fix memory corruption in ib_cache_gid_set_default_gid
2015-10-24 07:28:05 +09:00
Linus Torvalds
35df017c4d Three stable fixes (two in btree code used by DM thinp and one to
properly store flags in DM cache metadata's superblock).
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Merge tag 'dm-4.3-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:
 "Three stable fixes (two in btree code used by DM thinp and one to
  properly store flags in DM cache metadata's superblock)"

* tag 'dm-4.3-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache: the CLEAN_SHUTDOWN flag was not being set
  dm btree: fix leak of bufio-backed block in btree_split_beneath error path
  dm btree remove: fix a bug when rebalancing nodes after removal
2015-10-24 07:23:52 +09:00
Linus Torvalds
ea1ee5ff1b Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe:
 "A final set of fixes for 4.3.

  It is (again) bigger than I would have liked, but it's all been
  through the testing mill and has been carefully reviewed by multiple
  parties.  Each fix is either a regression fix for this cycle, or is
  marked stable.  You can scold me at KS.  The pull request contains:

   - Three simple fixes for NVMe, fixing regressions since 4.3.  From
     Arnd, Christoph, and Keith.

   - A single xen-blkfront fix from Cathy, fixing a NULL dereference if
     an error is returned through the staste change callback.

   - Fixup for some bad/sloppy code in nbd that got introduced earlier
     in this cycle.  From Markus Pargmann.

   - A blk-mq tagset use-after-free fix from Junichi.

   - A backing device lifetime fix from Tejun, fixing a crash.

   - And finally, a set of regression/stable fixes for cgroup writeback
     from Tejun"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: remove broken rbtree_postorder_for_each_entry_safe() usage in cgwb_bdi_destroy()
  NVMe: Fix memory leak on retried commands
  block: don't release bdi while request_queue has live references
  nvme: use an integer value to Linux errno values
  blk-mq: fix use-after-free in blk_mq_free_tag_set()
  nvme: fix 32-bit build warning
  writeback: fix incorrect calculation of available memory for memcg domains
  writeback: memcg dirty_throttle_control should be initialized with wb->memcg_completions
  writeback: bdi_writeback iteration must not skip dying ones
  writeback: fix bdi_writeback iteration in wakeup_dirtytime_writeback()
  writeback: laptop_mode_timer_fn() needs rcu_read_lock() around bdi_writeback iteration
  nbd: Add locking for tasks
  xen-blkfront: check for null drvdata in blkback_changed (XenbusStateClosing)
2015-10-24 07:20:57 +09:00
Linus Torvalds
ef594c421a Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fixes from Sage Weil:
 "Two fixes.

  One is a stopgap to prevent a stack blowout when users have a deep
  chain of image clones.  (We'll rewrite this code to be non-recursive
  for the next window, but in the meantime this is a simple fix that
  avoids a crash.)

  The second fixes a refcount underflow"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: prevent kernel stack blow up on rbd map
  rbd: don't leak parent_spec in rbd_dev_probe_parent()
2015-10-24 07:19:33 +09:00
Linus Torvalds
37902bc190 Merge branch 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
 "I have two more small fixes this week:

  Qu's fix avoids unneeded COW during fallocate, and Christian found a
  memory leak in the error handling of an earlier fix"

* 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs: fix possible leak in btrfs_ioctl_balance()
  btrfs: Avoid truncate tailing page if fallocate range doesn't exceed inode size
2015-10-24 07:17:58 +09:00
Vladimir Zapolskiy
5dd32eae60 i2c: pnx: fix runtime warnings caused by enabling unprepared clock
The driver can not be used on a platform with common clock framework
until clk_prepare/clk_unprepare calls are added, otherwise clk_enable
calls will fail and a WARN is generated.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-10-23 22:26:28 +02:00
Joe Thornber
3201ac452e dm cache: the CLEAN_SHUTDOWN flag was not being set
If the CLEAN_SHUTDOWN flag is not set when a cache is loaded then all cache
blocks are marked as dirty and a full writeback occurs.

__commit_transaction() is responsible for setting/clearing
CLEAN_SHUTDOWN (based the flags_mutator that is passed in).

Fix this issue, of the cache's on-disk flags being wrong, by making sure
__commit_transaction() does not reset the flags after the mutator has
altered the flags in preparation for them being serialized to disk.

before:

sb_flags = mutator(le32_to_cpu(disk_super->flags));
disk_super->flags = cpu_to_le32(sb_flags);
disk_super->flags = cpu_to_le32(cmd->flags);

after:

disk_super->flags = cpu_to_le32(cmd->flags);
sb_flags = mutator(le32_to_cpu(disk_super->flags));
disk_super->flags = cpu_to_le32(sb_flags);

Reported-by: Bogdan Vasiliev <bogdan.vasiliev@gmail.com>
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
2015-10-23 14:02:56 -04:00
Mike Snitzer
4dcb8b57df dm btree: fix leak of bufio-backed block in btree_split_beneath error path
btree_split_beneath()'s error path had an outstanding FIXME that speaks
directly to the potential for _not_ cleaning up a previously allocated
bufio-backed block.

Fix this by releasing the previously allocated bufio block using
unlock_block().

Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <thornber@redhat.com>
Cc: stable@vger.kernel.org
2015-10-23 14:02:55 -04:00
Joe Thornber
2871c69e02 dm btree remove: fix a bug when rebalancing nodes after removal
Commit 4c7e309340 ("dm btree remove: fix bug in redistribute3") wasn't
a complete fix for redistribute3().

The redistribute3 function takes 3 btree nodes and shares out the entries
evenly between them.  If the three nodes in total contained
(MAX_ENTRIES * 3) - 1 entries between them then this was erroneously getting
rebalanced as (MAX_ENTRIES - 1) on the left and right, and (MAX_ENTRIES + 1) in
the center.

Fix this issue by being more careful about calculating the target number
of entries for the left and right nodes.

Unit tested in userspace using this program:
https://github.com/jthornber/redistribute3-test/blob/master/redistribute3_t.c

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
2015-10-23 14:02:55 -04:00
Ilya Dryomov
6d69bb536b rbd: prevent kernel stack blow up on rbd map
Mapping an image with a long parent chain (e.g. image foo, whose parent
is bar, whose parent is baz, etc) currently leads to a kernel stack
overflow, due to the following recursion in the reply path:

  rbd_osd_req_callback()
    rbd_obj_request_complete()
      rbd_img_obj_callback()
        rbd_img_parent_read_callback()
          rbd_obj_request_complete()
            ...

Limit the parent chain to 16 images, which is ~5K worth of stack.  When
the above recursion is eliminated, this limit can be lifted.

Fixes: http://tracker.ceph.com/issues/12538

Cc: stable@vger.kernel.org # 3.10+, needs backporting for < 4.2
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Josh Durgin <jdurgin@redhat.com>
2015-10-23 18:37:24 +02:00
Ilya Dryomov
1f2c6651f6 rbd: don't leak parent_spec in rbd_dev_probe_parent()
Currently we leak parent_spec and trigger a "parent reference
underflow" warning if rbd_dev_create() in rbd_dev_probe_parent() fails.
The problem is we take the !parent out_err branch and that only drops
refcounts; parent_spec that would've been freed had we called
rbd_dev_unparent() remains and triggers rbd_warn() in
rbd_dev_parent_put() - at that point we have parent_spec != NULL and
parent_ref == 0, so counter ends up being -1 after the decrement.

Redo rbd_dev_probe_parent() to fix this.

Cc: stable@vger.kernel.org # 3.10+, needs backporting for < 4.2
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2015-10-23 18:36:03 +02:00
Alex Deucher
c86f5ebfbd drm/amdgpu: don't try to recreate sysfs entries on resume
Fixes an error on resume caused by:
fa022a9b65

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2015-10-23 10:45:35 -04:00
Alex Deucher
49abb26651 drm/radeon: don't try to recreate sysfs entries on resume
Fixes a harmless error message caused by:
51a4726b04

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2015-10-23 10:38:52 -04:00
Christian König
5c92d87d30 drm/amdgpu: stop leaking page flip fence
reservation_object_get_fences_rcu already takes the references.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
2015-10-23 10:30:44 -04:00
Linus Torvalds
0386729247 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Misc fixes: two KASAN fixes, two EFI boot fixes, two boot-delay
  optimization fixes, and a fix for a IRQ handling hang observed on
  virtual platforms"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm, kasan: Silence KASAN warnings in get_wchan()
  compiler, atomics, kasan: Provide READ_ONCE_NOCHECK()
  x86, kasan: Fix build failure on KASAN=y && KMEMCHECK=y kernels
  x86/smpboot: Fix CPU #1 boot timeout
  x86/smpboot: Fix cpu_init_udelay=10000 corner case boot parameter misbehavior
  x86/ioapic: Disable interrupts when re-routing legacy IRQs
  x86/setup: Extend low identity map to cover whole kernel range
  x86/efi: Fix multiple GOP device support
2015-10-23 22:34:32 +09:00
Linus Torvalds
df55793680 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
 "Misc fixes all around the map: an instrumentation fix, a nohz
  usability fix, a lockdep annotation fix and two task group scheduling
  fixes"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Add missing lockdep_unpin() annotations
  sched/deadline: Fix migration of SCHED_DEADLINE tasks
  nohz: Revert "nohz: Set isolcpus when nohz_full is set"
  sched/fair: Update task group's load_avg after task migration
  sched/fair: Fix overly small weight for interactive group entities
  sched, tracing: Stop/start critical timings around the idle=poll idle loop
2015-10-23 22:31:39 +09:00
Linus Torvalds
9f30931a54 Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
 "9 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  ocfs2/dlm: unlock lockres spinlock before dlm_lockres_put
  fault-inject: fix inverted interval/probability values in printk
  lib/Kconfig.debug: disable -Wframe-larger-than warnings with KASAN=y
  mm: make sendfile(2) killable
  thp: use is_zero_pfn() only after pte_present() check
  mailmap: update Javier Martinez Canillas' email
  MAINTAINERS: add Sergey as zsmalloc reviewer
  mm: cma: fix incorrect type conversion for size during dma allocation
  kmod: don't run async usermode helper as a child of kworker thread
2015-10-23 22:10:51 +09:00
Peter Zijlstra
0aaafaabfc sched/core: Add missing lockdep_unpin() annotations
Luca and Wanpeng reported two missing annotations that led to
false lockdep complaints. Add the missing annotations.

Reported-by: Luca Abeni <luca.abeni@unitn.it>
Reported-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: cbce1a6867 ("sched,lockdep: Employ lock pinning")
Link: http://lkml.kernel.org/r/20151023095008.GY17308@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-23 12:02:10 +02:00
Linus Torvalds
a2c01ed5d4 powerpc fixes for 4.3 #4
- Revert "Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8" from Paul
  - Handle irq_happened flag correctly in off-line loop from Paul
  - Validate rtas.entry before calling enter_rtas() from Vasant
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Merge tag 'powerpc-4.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Revert "Use the POWER8 Micro Partition Prefetch Engine in KVM HV on
   POWER8" from Paul
 - Handle irq_happened flag correctly in off-line loop from Paul
 - Validate rtas.entry before calling enter_rtas() from Vasant

* tag 'powerpc-4.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/rtas: Validate rtas.entry before calling enter_rtas()
  powerpc/powernv: Handle irq_happened flag correctly in off-line loop
  powerpc: Revert "Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8"
2015-10-23 18:49:51 +09:00
Linus Torvalds
d0ddf980d6 ARM: SoC fixes for 4.3-rc
Most of the changes this time are for incorrect device nodes in various
 ways, on on imx, berlin, exynos, ux500, uniphier, omap and meson.
 
 Chen-Yu Tsai now co-maintains mach-sunxi (Allwinner).
 
 Other bug fixes include
  * a partial revert of a broken tegra gpio patch
  * irq affinity for arm ccn
  * suspend on one Armada 385 machine
  * enable ZONE_DMA to avoid an OMAP crash for over 2GB RAM
  * turning on a regulator on beagleboard-x15 for HDMI
  * making the omap gpmc debug code visible
  * setup of orion network switch
  * a rare build regression for pxa
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Most of the changes this time are for incorrect device nodes in
  various ways, on on imx, berlin, exynos, ux500, uniphier, omap and
  meson.

  Chen-Yu Tsai now co-maintains mach-sunxi (Allwinner).

  Other bug fixes include
   - a partial revert of a broken tegra gpio patch
   - irq affinity for arm ccn
   - suspend on one Armada 385 machine
   - enable ZONE_DMA to avoid an OMAP crash for over 2GB RAM
   - turning on a regulator on beagleboard-x15 for HDMI
   - making the omap gpmc debug code visible
   - setup of orion network switch
   - a rare build regression for pxa"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (22 commits)
  ARM: OMAP2+: Fix imprecise external abort caused by bogus SRAM init
  thermal: exynos: Fix register read in TMU
  ARM: OMAP2+: Fix oops with LPAE and more than 2GB of memory
  ARM: tegra: Comment out gpio-ranges properties
  ARM: dts: uniphier: fix IRQ number for devices on PH1-LD6b ref board
  drivers/perf: arm_pmu: avoid CPU device_node reference leak
  bus: arm-ccn: Fix irq affinity setting on CPU migration
  bus: arm-ccn: Handle correctly no-more-cpus case
  ARM: mvebu: correct a385-db-ap compatible string
  ARM: meson6: DTS: Fix wrong reg mapping and IRQ numbers
  MAINTAINERS: Update Allwinner entry and add new maintainer
  ARM: ux500: modify initial levelshifter status
  ARM: pxa: fix pxa3xx DFI lockup hack
  Documentation: ARM: List new omap MMC requirements
  memory: omap-gpmc: dump "before" state before first modification
  memory: omap-gpmc: Fix unselectable debug option for GPMC
  ARM: dts: am57xx-beagle-x15: set VDD_SD to always-on
  ARM: dts: Fix audio card detection on Peach boards
  ARM: EXYNOS: Fix double of_node_put() when parsing child power domains
  ARM: orion: Fix DSA platform device after mvmdio conversion
  ...
2015-10-23 18:38:00 +09:00
Linus Torvalds
2c44f4f035 Bug fixes for ARM, mostly 4.3 regressions related to virtual
interrupt controller changes.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM bugfixes from Paolo Bonzini:
 "Bug fixes for ARM, mostly 4.3 regressions related to virtual interrupt
  controller changes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  arm/arm64: KVM: Fix disabled distributor operation
  arm/arm64: KVM: Clear map->active on pend/active clear
  arm/arm64: KVM: Fix arch timer behavior for disabled interrupts
  KVM: arm: use GIC support unconditionally
  KVM: arm/arm64: Fix memory leak if timer initialization fails
  KVM: arm/arm64: Do not inject spurious interrupts
2015-10-23 18:32:29 +09:00
Linus Torvalds
8a990fb47b Running tests on other changes, the system locked up due to lots
of warnings. It was caused by the stack tracer triggering a warning
 about using rcu_dereference() when RCU was not watching. This can happen
 due to the fact that the stack tracer uses the function tracer to check
 each function, and there's functions that may be called and traced
 when RCU stopped watching. Namely when a function is called just before
 going idle or to userspace and after RCU stopped watching that current
 CPU.
 
 The first patch makes sure that RCU is watching when the stack tracer
 uses RCU. The second patch is to make sure that the stack tracer does
 not get called by functions in NMI, as it's not NMI safe.
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Merge tag 'trace-fixes-v4.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Running tests on other changes, the system locked up due to lots of
  warnings.  It was caused by the stack tracer triggering a warning
  about using rcu_dereference() when RCU was not watching.  This can
  happen due to the fact that the stack tracer uses the function tracer
  to check each function, and there are functions that may be called and
  traced when RCU stopped watching.  Namely when a function is called
  just before going idle or to userspace and after RCU stopped watching
  that current CPU.

  The first patch makes sure that RCU is watching when the stack tracer
  uses RCU.  The second patch is to make sure that the stack tracer does
  not get called by functions in NMI, as it's not NMI safe"

* tag 'trace-fixes-v4.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Do not allow stack_tracer to record stack in NMI
  tracing: Have stack tracer force RCU to be watching
2015-10-23 18:24:33 +09:00
Linus Torvalds
0122835a02 sound fixes for 4.3-rc7
There is nothing to worry you much, only a few small & stable patches
 are found for usual stuff, HD-audio (a Lenovo laptop quirk, a fix for
 minor error handling) and ASoC (trivial fixes for RT298 and WM
 codecs).  The only remaining major change is the fix for ASoC SX_TLV
 control that was overseen during refactoring, but the fix itself is
 trivial and safe.
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Merge tag 'sound-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "There is nothing to worry you much, only a few small & stable patches
  are found for usual stuff, HD-audio (a Lenovo laptop quirk, a fix for
  minor error handling) and ASoC (trivial fixes for RT298 and WM
  codecs).

  The only remaining major change is the fix for ASoC SX_TLV control
  that was overseen during refactoring, but the fix itself is trivial
  and safe"

* tag 'sound-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: wm8962: mark cache_dirty flag after software reset in pm_resume
  ASoC: rt298: fix wrong setting of gpio2_en
  ASoC: wm8904: Correct number of EQ registers
  ALSA: hda - Fix deadlock at error in building PCM
  ASoC: Add info callback for SX_TLV controls
  ASoC: rt298: correct index default value
  ALSA: hda - Fix inverted internal mic on Lenovo G50-80
  ALSA: hdac: Explicitly add io.h
2015-10-23 18:21:55 +09:00
Linus Torvalds
45d80f168d media fixes for v4.3-rc7
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Merge tag 'media/v4.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:
 "Some regression fixes and potential security issues:

   - netup_unidvb: fix potential crash when spi is NULL
   - rtl28xxu: fix control message flaws
   - m88ds3103: fix a regression on Kernel 4.2
   - c8sectpfe: fix some issues on this new driver
   - v4l2-flash-led-class: fix a Kbuild dependency
   - si2157 and si2158: check for array boundary when uploading firmware
     files
   - horus3a and lnbh25: fix some building troubles when some options
     aren't selected
   - ir-hix5hd2: drop the use of IRQF_NO_SUSPEND"

* tag 'media/v4.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] m88ds3103: use own reg update_bits() implementation
  [media] rtl28xxu: fix control message flaws
  [media] v4l2-flash-led-class: Add missing VIDEO_V4L2 Kconfig dependency
  [media] netup_unidvb: fix potential crash when spi is NULL
  [media] si2168: Bounds check firmware
  [media] si2157: Bounds check firmware
  [media] ir-hix5hd2: drop the use of IRQF_NO_SUSPEND
  [media] c8sectpfe: fix return of garbage
  [media] c8sectpfe: fix ininitialized error return on firmware load failure
  [media] lnbh25: Fix lnbh25_attach() function return type
  [media] horus3a: Fix horus3a_attach() function parameters
2015-10-23 18:15:20 +09:00
Linus Torvalds
a67b20d24c Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "I've been a bit slow gathering these:

   - drm/mst: one mutex leak in a fail path

   - radeon: two oops fixes, one dpm fix

   - i915: one messy set of fixes, where we revert the original fix, and
           pull back the proper set of fixes from -next on top.

   - nouveau: one fix for an illegal buffer placement.

  Doesn't look too bad, hopefully shouldn't be too much more"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/nouveau/gem: return only valid domain when there's only one
  drm: fix mutex leak in drm_dp_get_mst_branch_device
  drm/amdgpu: add missing dpm check for KV dpm late init
  drm/amdgpu/dpm: don't add pwm attributes if DPM is disabled
  drm/radeon/dpm: don't add pwm attributes if DPM is disabled
  drm/i915: Add primary plane to mask if it's visible
  drm/i915: Move sprite/cursor plane disable to intel_sanitize_crtc()
  drm/i915: Assign hwmode after encoder state readout
  Revert "drm/i915: Add primary plane to mask if it's visible"
  drm/i915: Deny wrapping an userptr into a framebuffer
  drm/i915: Enable DPLL VGA mode before P1/P2 divider write
  drm/i915: Restore lost DPLL register write on gen2-4
  drm/i915: Flush pipecontrol post-sync writes
  drm/i915: Fix kerneldoc for i915_gem_shrink_all
2015-10-23 18:08:22 +09:00
Joseph Qi
b67de018b3 ocfs2/dlm: unlock lockres spinlock before dlm_lockres_put
dlm_lockres_put will call dlm_lockres_release if it is the last
reference, and then it may call dlm_print_one_lock_resource and
take lockres spinlock.

So unlock lockres spinlock before dlm_lockres_put to avoid deadlock.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-10-23 17:55:10 +09:00