Commit Graph

547990 Commits

Author SHA1 Message Date
Joe Stringer 6f22595246 openvswitch: Reject ct_state unsupported bits
Previously, if userspace specified ct_state bits in the flow key which
are currently undefined (and therefore unsupported), then they would be
ignored. This could cause unexpected behaviour in future if userspace is
extended to support additional bits but attempts to communicate with the
current version of the kernel. This patch rectifies the situation by
rejecting such ct_state bits.

Fixes: 7f8a436eaa "openvswitch: Add conntrack action"
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 05:03:05 -07:00
Joe Stringer ec0d043d05 openvswitch: Ensure flow is valid before executing ct
The ct action uses parts of the flow key, so we need to ensure that it
is valid before executing that action.

Fixes: 7f8a436eaa "openvswitch: Add conntrack action"
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 05:03:05 -07:00
Joe Stringer b8f2257069 openvswitch: Fix skb leak in ovs_fragment()
If ovs_fragment() was unable to fragment the skb due to an L2 header
that exceeds the supported length, skbs would be leaked. Fix the bug.

Fixes: 7f8a436eaa "openvswitch: Add conntrack action"
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 05:03:03 -07:00
Joe Stringer 0a7cc172a0 openvswitch: Fix typos in CT headers
These comments hadn't caught up to their implementations, fix them.

Fixes: 7f8a436eaa "openvswitch: Add conntrack action"
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 05:03:03 -07:00
David S. Miller 60872867d8 Merge branch 'dsa-unbind'
Neil Armstrong says:

====================
net: dsa: complete and fix the dsa unbinding

In order to cleanly unbind the dsa core, either as a module removal,
or a platform device unbind, switch the allocation the their devm_
counterparts and complete the destroy functions.

First, the missing kfree were added, the remove function were
completed then kfree were removed in favor to devm_ calls.

The last patch is an way to cleanly exit the probe when no
switch is found in the discover process.

The patches are based on the current net.

v3:
 - make checkpatch happy with 1/5 & 5/5
 - fix 5/5 exit path with a goto
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:56:12 -07:00
Neil Armstrong 4d7f3e757c net: dsa: exit probe if no switch were found
If no switch were found in dsa_setup_dst, return -ENODEV and
exit the dsa_probe cleanly.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:56:11 -07:00
Neil Armstrong d4ac35d6ed net: dsa: switch to devm_ calls and remove kfree calls
Now the kfree calls exists in the the remove functions, remove them in all
places except the of_probe functions and replace allocation calls
with their devm_ counterparts.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:56:09 -07:00
Neil Armstrong cbc5d90b37 net: dsa: complete dsa_switch_destroy
When unbinding dsa, complete the dsa_switch_destroy to unregister the
fixed link phy then cleanly unregister and destroy the net devices.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:56:08 -07:00
Neil Armstrong e410ddb89e net: dsa: add missing dsa_switch mdiobus remove
To prevent memory leakage on unbinding, add missing mdiobus unregister
and unallocation calls.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:56:07 -07:00
Neil Armstrong 1023d2ec1e net: dsa: add missing kfree on remove
To prevent memory leakage on unbinding, add missing kfree calls.
Includes minor cosmetic change to make patch clean.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:56:06 -07:00
David Ahern 6e28b00082 net: Fix vti use case with oif in dst lookups for IPv6
It occurred to me yesterday that 741a11d9e4 ("net: ipv6: Add
RT6_LOOKUP_F_IFACE flag if oif is set") means that xfrm6_dst_lookup
needs the FLOWI_FLAG_SKIP_NH_OIF flag set. This latest commit causes
the oif to be considered in lookups which is known to break vti. This
explains why 58189ca7b2 did not the IPv6 change at the time it was
submitted.

Fixes: 42a7b32b73 ("xfrm: Add oif to dst lookups")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:25:03 -07:00
Sudip Mukherjee d663baba8b video: of: fix memory leak
If of_parse_display_timing() fails we are printing an error message and
jumping to the error path but we missed freeing "dt".

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2015-10-07 14:13:59 +03:00
Mitch Williams 90d2c056bd i40e/i40evf: set AQ count after memory allocation
The standard way to check if the AQ is enabled is to look at the
count field. So we should only set this field after we have
successfully allocated memory. To do otherwise is to incite
panic among the populace.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:13:50 -07:00
Mark Brown c2c80bdb9e Merge remote-tracking branches 'spi/fix/davinci' and 'spi/fix/sh-msiof' into spi-linus 2015-10-07 11:43:39 +01:00
Joerg Roedel 02685b1df0 Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into iommu/fixes 2015-10-07 12:23:24 +02:00
Linus Torvalds 79c7c7acd2 Merge branch 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull strscpy fixes from Chris Metcalf :
 "This patch series fixes up a couple of architecture issues where
  strscpy wasn't configured correctly (missing on h8300, duplicating
  local and asm-generic copies on powerpc and tile).

  It also adds a use of zero_bytemask() to the final store for strscpy
  to avoid writing uninitialized data to the destination.  However, to
  make this work we had to add support for zero_bytemask() to the two
  architectures that didn't have it (alpha and tile), because they were
  providing their own local copies, but didn't provide the
  zero_bytemask() that was previously only required when building with
  CONFIG_DCACHE_WORD_ACCESS"

[ Side note: there is still no actual users of strscpy except for the
  one preexisting use in arch/tile that predates the generic version.
  So this is all about fixing the infrastructure so that we eventually
  can start using it.  - Linus ]

* 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  strscpy: zero any trailing garbage bytes in the destination
  word-at-a-time.h: support zero_bytemask() on alpha and tile
  word-at-a-time.h: fix some Kbuild files
2015-10-07 09:52:42 +01:00
Linus Torvalds 3f5e4a3116 A few MTD fixes:
* mxc_nand: a "refactoring only" change in 4.3-rc1 had some bad pointer
    (array) arithmetic. Fix that
 
  * sunxi_nand:
 
    - Fix an old list manipulation / memory management bug in the device
      release() code path
 
    - Correct a few mistakes in OOB write support
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Merge tag 'for-linus-20151006' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Brian Norris:
 "A few MTD fixes:

   - mxc_nand: a "refactoring only" change in 4.3-rc1 had some bad
     pointer (array) arithmetic.  Fix that

   - sunxi_nand:

   - Fix an old list manipulation / memory management bug in the device
     release() code path

   - Correct a few mistakes in OOB write support"

* tag 'for-linus-20151006' of git://git.infradead.org/linux-mtd:
  mxc_nand: fix copy_spare
  mtd: nand: sunxi: fix sunxi_nand_chips_cleanup()
  mtd: nand: sunxi: fix OOB handling in ->write_xxx() functions
2015-10-07 09:35:15 +01:00
Kalle Valo de28a05ee2 * some fixes for PN key programming when entering D3;
* fix for CSA when the AP is stopped during a channel switch;
 * fix firmware name for 3160 devices;
 * add some new PCI IDs for 7265 devices;
 * fix CT-kill entry;
 * fix kernel panic when a sysassert occurs in the init ucode flow;
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Merge tag 'iwlwifi-for-kalle-2015-10-05' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes

* some fixes for PN key programming when entering D3;
* fix for CSA when the AP is stopped during a channel switch;
* fix firmware name for 3160 devices;
* add some new PCI IDs for 7265 devices;
* fix CT-kill entry;
* fix kernel panic when a sysassert occurs in the init ucode flow;
2015-10-07 11:12:01 +03:00
Linus Torvalds a0eeb8dd34 NFS client bugfixes for Linux 4.3
Highlights include:
 
 Bugfixes:
 - Fix a use-after-free bug in the RPC/RDMA client
 - Fix a write performance regression
 - Fix up page writeback accounting
 - Don't try to reclaim unused state owners
 - Fix a NFSv4 nograce recovery hang
 - reset states to use open_stateid when returning delegation voluntarily
 - Fix a tracepoint NULL-pointer dereference
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Merge tag 'nfs-for-4.3-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

  Bugfixes:
   - Fix a use-after-free bug in the RPC/RDMA client
   - Fix a write performance regression
   - Fix up page writeback accounting
   - Don't try to reclaim unused state owners
   - Fix a NFSv4 nograce recovery hang
   - reset states to use open_stateid when returning delegation
     voluntarily
   - Fix a tracepoint NULL-pointer dereference"

* tag 'nfs-for-4.3-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: Fix a tracepoint NULL-pointer dereference
  nfs4: reset states to use open_stateid when returning delegation voluntarily
  NFSv4: Fix a nograce recovery hang
  NFSv4.1: nfs4_opendata_check_deleg needs to handle NFS4_OPEN_CLAIM_DELEG_CUR_FH
  NFSv4: Don't try to reclaim unused state owners
  NFS: Fix a write performance regression
  NFS: Fix up page writeback accounting
  xprtrdma: disconnect and flush cqs before freeing buffers
2015-10-07 08:54:22 +01:00
Linus Torvalds 00a3d660cb Revert "fs: do not prefault sys_write() user buffer pages"
This reverts commit 998ef75ddb.

The commit itself does not appear to be buggy per se, but it is exposing
a bug in ext4 (and Ted thinks ext3 too, but we solved that by getting
rid of it).  It's too late in the release cycle to really worry about
this, even if Dave Hansen has a patch that may actually fix the
underlying ext4 problem.  We can (and should) revisit this for the next
release.

The problem is that moving the prefaulting later now exposes a special
case with partially successful writes that isn't handled correctly.  And
the prefaulting likely isn't normally even that much of a performance
issue - it looks like at least one reason Dave saw this in his
performance tests is that he also ran them on Skylake that now supports
the new SMAP code, which makes the normally very cheap user space
prefaulting noticeably more expensive.

Bisected-and-acked-by: Ted Ts'o <tytso@mit.edu>
Analyzed-and-acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-10-07 08:32:38 +01:00
Christophe Lombard 4108efb02d cxl: Fix number of allocated pages in SPA
The scheduled process area is currently allocated before assigning the
correct maximum processes to the AFU, which will mean we only ever
allocate a fixed number of pages for the scheduled process area. This
will limit us to 958 processes with 2 x 64K pages. If we try to use more
processes than that we'd probably overrun the buffer and corrupt memory
or crash.

AFUs that require three or more interrupts per process will not be
affected as they are already limited to less processes than that, but we
could hit it on an AFU that requires 0, 1 or 2 interrupts per process,
or when using 4K pages.

This patch moves the initialisation of the num_procs to before the SPA
allocation so that enough pages will be allocated for the number of
processes that the AFU supports.

Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Cc: <stable@vger.kernel.org> # 3.18+
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-10-07 16:44:46 +11:00
Frediano Ziglio 266424b537 drm/qxl: avoid dependency lock
qxl_bo_unref calls drm_gem_object_unreference_unlocked which
locks dev->struct_mutex. However this lock could be already
locked if the call came from qxl_gem_object_free.
As we don't need to call qxl_bo_ref/qxl_bo_unref cause
qxl_release_list_add will hold a reference by itself avoid
to call them and the possible deadlock.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2015-10-07 15:33:45 +10:00
Frediano Ziglio 7eb9974f36 drm/qxl: avoid buffer reservation in qxl_crtc_page_flip
This avoid a dependency lock error.
According to https://lwn.net/Articles/548909/ users of WW mutex API
should avoid using different context.
When a buffer is reserved with qxl_bo_reserve a ww_mutex_lock without
context is used. However during qxl_draw_dirty_fb different locks
with specific context are used.
This is detected during a machine booting with a debug kernel with lock
dependency checking enabled.
Like many other function in this file to avoid this problem object
pinning is used. Once the object is pinned is not necessary to keep
the lock so it can be released avoiding the locking problem.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2015-10-07 15:33:06 +10:00
Gerd Hoffmann 60906529be drm/qxl: fix framebuffer dirty rectangle tracking.
Commit "c0fe07a drm/qxl: rewrite framebuffer support" has a bug in the
dirty rectangle tracking:  Instead of ignoring an empty dirty rectangle
when adding a new dirty region the dirty region gets extended to the
upper left corner.  Fix it.

Cc: linux-stable@vger.kernel.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2015-10-07 15:31:45 +10:00
Andrey Gelman 879f2fea8a Input: ads7846 - correct the value got from SPI
According to the touch controller spec, SPI return a 16 bit value, only 12
bits are valid, they are bit[14-3].

The value of MISO and MOSI can be configured when SPI is in idle mode.
Currently this touch driver assumes the SPI bus sets the MOSI and MISO in
low level when SPI bus is in idle mode. So the bit[15] of the value got
from SPI bus is always 0. But when SPI bus congfigures the MOSI and MISO in
high level during the SPI idle mode, the bit[15] of the value get from SPI
is always 1. If bit[15] is not masked, we may get the wrong value.

Mask the invalid bit to make sure the correct value gets returned.
Regardless of the SPI bus idle configuration.

Signed-off-by: Andrey Gelman <andrey.gelman@compulab.co.il>
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-10-06 16:39:14 -07:00
Anna Schumaker 39d0d3bdf7 NFS: Fix a tracepoint NULL-pointer dereference
Running xfstest generic/013 with the tracepoint nfs:nfs4_open_file
enabled produces a NULL-pointer dereference when calculating fileid and
filehandle of the opened file.  Fix this by checking if state is NULL
before trying to use the inode pointer.

Reported-by: Olga Kornievskaia <aglo@umich.edu>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-10-06 18:56:25 -04:00
Chris Metcalf 990486c8af strscpy: zero any trailing garbage bytes in the destination
It's possible that the destination can be shadowed in userspace
(as, for example, the perf buffers are now).  So we should take
care not to leak data that could be inspected by userspace.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-10-06 14:53:18 -04:00
Chris Metcalf c753bf34c9 word-at-a-time.h: support zero_bytemask() on alpha and tile
Both alpha and tile needed implementations of zero_bytemask.

The alpha version is untested.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-10-06 14:53:16 -04:00
Chris Metcalf 19c22f3a29 word-at-a-time.h: fix some Kbuild files
arch/tile added word-at-a-time.h after the patch that added generic-y
entries; the generic-y entry is now stale.

arch/h8300 is newer than the generic-y patch for word-at-a-time.h,
and needs a generic-y entry.

arch/powerpc seems to have gotten a generic-y entry by mistake in
the first patch; this change removes it.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-10-06 14:52:48 -04:00
Haggai Eran b8cab5dab1 IB/cma: Accept connection without a valid netdev on RoCE
The netdev checks recently added to RDMA CM expect a valid netdev to be
found for both InfiniBand and RoCE, but the code that find a netdev is
only implemented for InfiniBand.

Currently RoCE doesn't provide an API to find the netdev matching a
given set of parameters, so this patch just disables the netdev enforcement
for each incoming connections when the link layer is RoCE.

Fixes: 4c21b5bcef ("IB/cma: Add net_dev and private data checks to RDMA CM")
Reported-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-10-06 14:25:16 -04:00
Sagi Grimberg f022fa88ce xprtrdma: Don't require LOCAL_DMA_LKEY support for fastreg
There is no need to require LOCAL_DMA_LKEY support as the
PD allocation makes sure that there is a local_dma_lkey. Also
correctly set a return value in error path.

This caused a NULL pointer dereference in mlx5 which removed
the support for LOCAL_DMA_LKEY.

Fixes: bb6c96d728 ("xprtrdma: Replace global lkey with lkey local to PD")
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-10-06 14:23:00 -04:00
Yang Shi 62c6c61adb arm64: replace read_lock to rcu lock in call_break_hook
BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
in_atomic(): 0, irqs_disabled(): 128, pid: 342, name: perf
1 lock held by perf/342:
 #0:  (break_hook_lock){+.+...}, at: [<ffffffc0000851ac>] call_break_hook+0x34/0xd0
irq event stamp: 62224
hardirqs last  enabled at (62223): [<ffffffc00010b7bc>] __call_rcu.constprop.59+0x104/0x270
hardirqs last disabled at (62224): [<ffffffc0000fbe20>] vprintk_emit+0x68/0x640
softirqs last  enabled at (0): [<ffffffc000097928>] copy_process.part.8+0x428/0x17f8
softirqs last disabled at (0): [<          (null)>]           (null)
CPU: 0 PID: 342 Comm: perf Not tainted 4.1.6-rt5 #4
Hardware name: linux,dummy-virt (DT)
Call trace:
[<ffffffc000089968>] dump_backtrace+0x0/0x128
[<ffffffc000089ab0>] show_stack+0x20/0x30
[<ffffffc0007030d0>] dump_stack+0x7c/0xa0
[<ffffffc0000c878c>] ___might_sleep+0x174/0x260
[<ffffffc000708ac8>] __rt_spin_lock+0x28/0x40
[<ffffffc000708db0>] rt_read_lock+0x60/0x80
[<ffffffc0000851a8>] call_break_hook+0x30/0xd0
[<ffffffc000085a70>] brk_handler+0x30/0x98
[<ffffffc000082248>] do_debug_exception+0x50/0xb8
Exception stack(0xffffffc00514fe30 to 0xffffffc00514ff50)
fe20:                                     00000000 00000000 c1594680 0000007f
fe40: ffffffff ffffffff 92063940 0000007f 0550dcd8 ffffffc0 00000000 00000000
fe60: 0514fe70 ffffffc0 000be1f8 ffffffc0 0514feb0 ffffffc0 0008948c ffffffc0
fe80: 00000004 00000000 0514fed0 ffffffc0 ffffffff ffffffff 9282a948 0000007f
fea0: 00000000 00000000 9282b708 0000007f c1592820 0000007f 00083914 ffffffc0
fec0: 00000000 00000000 00000010 00000000 00000064 00000000 00000001 00000000
fee0: 005101e0 00000000 c1594680 0000007f c1594740 0000007f ffffffd8 ffffff80
ff00: 00000000 00000000 00000000 00000000 c1594770 0000007f c1594770 0000007f
ff20: 00665e10 00000000 7f7f7f7f 7f7f7f7f 01010101 01010101 00000000 00000000
ff40: 928e4cc0 0000007f 91ff11e8 0000007f

call_break_hook is called in atomic context (hard irq disabled), so replace
the sleepable lock to rcu lock, replace relevant list operations to rcu
version and call synchronize_rcu() in unregister_break_hook().

And, replace write lock to spinlock in {un}register_break_hook.

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-10-06 19:10:28 +01:00
Jeff Squyres 3805eade3b usnic: add missing clauses to BSD license
The usnic_verbs kernel module was clearly marked with the following in
its code:

  MODULE_LICENSE("Dual BSD/GPL");

However, we accidentally left a few clauses of the BSD text out of the
license header in all the source files.  This commit fixes that: all
the files are properly dual BSD/GPL-licensed.  Contributors that might
have been confused by this have been contacted to get their permission
and are Cc:ed here.

Cc: Benoit Taine <benoit.taine@lip6.fr>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Masanari Iida <standby24x7@gmail.com>
Cc: Matan Barak <matanb@mellanox.com>
Cc: Michael Wang <yun.wang@profitbricks.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Jeff Squyres <jsquyres@cisco.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-10-06 13:43:25 -04:00
Mark Rutland 4ca3bc86be arm64: Don't relocate non-existent initrd
When booting a kernel without an initrd, the kernel reports that it
moves -1 bytes worth, having gone through the motions with initrd_start
equal to initrd_end:

    Moving initrd from [4080000000-407fffffff] to [9fff49000-9fff48fff]

Prevent this by bailing out early when the initrd size is zero (i.e. we
have no initrd), avoiding the confusing message and other associated
work.

Fixes: 1570f0d7ab ("arm64: support initrd outside kernel linear map")
Cc: Mark Salter <msalter@redhat.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-10-06 18:33:15 +01:00
Alex Deucher 9a65e6866f drm/amdgpu: flag iceland as experimental
These have not been tested very extensively and generally
seem to be problematic.  Mark them as experimental for now.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=92270

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2015-10-06 11:58:58 -04:00
Peter Zijlstra 95913d9791 sched/core: Fix TASK_DEAD race in finish_task_switch()
So the problem this patch is trying to address is as follows:

        CPU0                            CPU1

        context_switch(A, B)
                                        ttwu(A)
                                          LOCK A->pi_lock
                                          A->on_cpu == 0
        finish_task_switch(A)
          prev_state = A->state  <-.
          WMB                      |
          A->on_cpu = 0;           |
          UNLOCK rq0->lock         |
                                   |    context_switch(C, A)
                                   `--  A->state = TASK_DEAD
          prev_state == TASK_DEAD
            put_task_struct(A)
                                        context_switch(A, C)
                                        finish_task_switch(A)
                                          A->state == TASK_DEAD
                                            put_task_struct(A)

The argument being that the WMB will allow the load of A->state on CPU0
to cross over and observe CPU1's store of A->state, which will then
result in a double-drop and use-after-free.

Now the comment states (and this was true once upon a long time ago)
that we need to observe A->state while holding rq->lock because that
will order us against the wakeup; however the wakeup will not in fact
acquire (that) rq->lock; it takes A->pi_lock these days.

We can obviously fix this by upgrading the WMB to an MB, but that is
expensive, so we'd rather avoid that.

The alternative this patch takes is: smp_store_release(&A->on_cpu, 0),
which avoids the MB on some archs, but not important ones like ARM.

Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org> # v3.1+
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: manfred@colorfullife.com
Cc: will.deacon@arm.com
Fixes: e4a52bcb9a ("sched: Remove rq->lock from the first half of ttwu()")
Link: http://lkml.kernel.org/r/20150929124509.GG3816@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-06 17:05:17 +02:00
Alex Deucher e79d5c0870 drm/amdgpu: check before checking pci bridge registers
Make sure we are not the root device before attempting to
read the pcie bridge registers to check the pcie gen speeed.

Fixes a crash when the device is passed through to a VM.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2015-10-06 10:43:16 -04:00
Junichi Nomura 50887bd139 dm: fix request-based dm error reporting
end_clone_bio() is a endio callback for clone bio and should check
and save the clone's bi_error for error reporting.  However,
4246a0b63b ("block: add a bi_error field to struct bio") changed
the function to check the original bio's bi_error, which is 0.

Without this fix, clone's error is ignored and reported to the
original request as success.  Thus data corruption will be observed.

Fixes: 4246a0b63b ("block: add a bi_error field to struct bio")
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2015-10-06 10:08:16 -04:00
Linus Torvalds f6702681a0 xen: bug fixes for 4.3-rc4
- Fix VM save performance regression with x86 PV guests.
 - Make kexec work in x86 PVHVM guests (if Xen has the soft-reset ABI).
 - Other minor fixes.
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Merge tag 'for-linus-4.3b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - Fix VM save performance regression with x86 PV guests

 - Make kexec work in x86 PVHVM guests (if Xen has the soft-reset ABI)

 - Other minor fixes.

* tag 'for-linus-4.3b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  x86/xen/p2m: hint at the last populated P2M entry
  x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map
  x86/xen: Support kexec/kdump in HVM guests by doing a soft reset
  xen/x86: Don't try to write syscall-related MSRs for PV guests
  xen: use correct type for HYPERVISOR_memory_op()
2015-10-06 15:05:02 +01:00
Linus Torvalds 3ec20e2e61 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
 "Three bug fixes and an update to the default configuration"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/defconfig: set SCSI_DH=y
  s390/vtime: correct scaled cputime of partially idle CPUs
  s390/boot/decompression: disable floating point in decompressor
  s390/numa: use correct type for node_to_cpumask_map
2015-10-06 14:59:36 +01:00
NeilBrown 7d35199e15 BTRFS: support NFSv2 export
The "fh_len" passed to ->fh_to_* is not guaranteed to be that same as
that returned by encode_fh - it may be larger.

With NFSv2, the filehandle is fixed length, so it may appear longer
than expected and be zero-padded.

So we must test that fh_len is at least some value, not exactly equal
to it.

Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: David Sterba <dsterba@suse.cz>
2015-10-06 06:55:23 -07:00
chandan e5fffbac4a Btrfs: open_ctree: Fix possible memory leak
After reading one of chunk or tree root tree's root node from disk, if the
root node does not have EXTENT_BUFFER_UPTODATE flag set, we fail to release
the memory used by the root node. Fix this.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
2015-10-06 06:55:22 -07:00
Linus Torvalds 3c68319b28 Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull CIFS fixes from Steve French:
 "Two fixes for problems pointed out by automated tools.

  Thanks PaX/grsecurity team and Dan Carpenter (and the Smatch tool)"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] Update cifs version number
  [SMB3] Do not fall back to SMBWriteX in set_file_size error cases
  [SMB3] Missing null tcon check
2015-10-06 14:30:21 +01:00
David Vrabel 98dd166ea3 x86/xen/p2m: hint at the last populated P2M entry
With commit 633d6f17cd (x86/xen: prepare
p2m list for memory hotplug) the P2M may be sized to accomdate a much
larger amount of memory than the domain currently has.

When saving a domain, the toolstack must scan all the P2M looking for
populated pages.  This results in a performance regression due to the
unnecessary scanning.

Instead of reporting (via shared_info) the maximum possible size of
the P2M, hint at the last PFN which might be populated.  This hint is
increased as new leaves are added to the P2M (in the expectation that
they will be used for populated entries).

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: <stable@vger.kernel.org> # 4.0+
2015-10-06 13:54:20 +01:00
Arnd Bergmann 5a37b15378 Renesas ARM Based SoC Fixes for v4.3
* Add Add CPG/MSTP Clock Domain for sound on r8a779[01] SoCs.
   This allows sound to work once again.
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Merge tag 'renesas-fixes-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes

Merge "Renesas ARM Based SoC Fixes for v4.3" from Simon Horman

* Add Add CPG/MSTP Clock Domain for sound on r8a779[01] SoCs.
  This allows sound to work once again.

* tag 'renesas-fixes-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: r8a7791 dtsi: Add CPG/MSTP Clock Domain for sound
  ARM: shmobile: r8a7790 dtsi: Add CPG/MSTP Clock Domain for sound
2015-10-06 14:31:53 +02:00
Arnd Bergmann b0d58113e5 Allwinner fixes for 4.3
Two patches, one that fixes one of the DT build, and the other raising the
 voltage of the lowest OPP of the A20 to remain within the SoC operating
 boundaries
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Merge tag 'sunxi-fixes-for-4.3' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into fixes

Merge "Allwinner fixes for 4.3" from Maxime Ripard:

Two patches, one that fixes one of the DT build, and the other raising the
voltage of the lowest OPP of the A20 to remain within the SoC operating
boundaries

* tag 'sunxi-fixes-for-4.3' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  ARM: dts: Fix Makefile target for sun4i-a10-itead-iteaduino-plus
  ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to meet SoC specifications
2015-10-06 14:30:14 +02:00
Arnd Bergmann c6722ddce0 Samsung fixes for v4.3
- fix invalid clock used for FIMD IOMMU
 - fix thermal boot issue smdk5250-smdk5250
 - fix S2R on exynos4412 trats2 boards
 - fix LEDs on exynos5422-odroidxu3-common
 - fix booting of all 8 cores on exynos542x
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Merge tag 'samsung-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes

Merge "Samsung fixes for v4.3" from Kukjin Kim:

- fix invalid clock used for FIMD IOMMU
- fix thermal boot issue smdk5250-smdk5250
- fix S2R on exynos4412 trats2 boards
- fix LEDs on exynos5422-odroidxu3-common
- fix booting of all 8 cores on exynos542x

* tag 'samsung-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: dts: Fix wrong clock binding for sysmmu_fimd1_1 on exynos5420
  ARM: dts: Fix bootup thermal issue on smdk5250
  ARM: dts: add suspend opp to exynos4412
  ARM: dts: Fix LEDs on exynos5422-odroidxu3
  ARM: EXYNOS: reset Little cores when cpu is up
2015-10-06 14:26:32 +02:00
Mark Brown ff6afc8d0d MAINTAINERS: Remove wm97xx entry
Neither myself or Liam is especially interested in this driver any more
and the devices are already covered by the general ex-Wolfson entry so
just remove this.

Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
2015-10-06 12:21:17 +01:00
Ben Hutchings da11f98fd0 MIPS: Define ioremap_uc
All architectures must now define ioremap_uc(), but MIPS currently
only has ioremap_nocache().

Fixes: 4c73e89266 ("arch/*/io.h: Add ioremap_uc() to all architectures")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11263/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-06 13:19:25 +02:00
Mark Brown 22ca03a3ad Merge remote-tracking branch 'regulator/fix/axp20x' into regulator-linus 2015-10-06 12:00:42 +01:00