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549814 commits

Author SHA1 Message Date
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
David S. Miller
e892406f00 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2015-10-03

This series contains updates to i40e and i40evf, some of which are to
resolve more Red Hat bugzilla issues.

Jiang Liu updates the i40e and i40evf drivers to use numa_mem_id()
instead of numa_node_id() to get the nearest node with memory which
better supports memoryless nodes.

Anjali fixes an issue from Dan Carpenter <dan.carpenter@oracle.com>,
to resolve a memory leak in X722 RSS configuration path, where we should
free the memory allocated before exiting.

Shannon modifies the drivers to ensure we have the spinlocks before we
clear the ARQ and ASQ management registers.  In addition, we widen the
locked portion insert a sanity check to ensure we are working with safe
register values.

Mitch fixes an issue where under certain circumstances, we can get an
extra VF_RESOURCES message from the PF driver at runtime.  When this
occurs, we need to parse it because our VSI may have changed and that
will affect the relationship with the PF driver.  But this parsing also
blows away our current MAC address, so resolve the issue by restoring
the current MAC address from the netdev struct after we parse the
resource message.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 03:01:53 -07:00
Russell King
d25b8e7429 net: dsa: better error reporting
Add additional error reporting to the generic DSA code, so it's easier
to debug when things go wrong.  This was useful when initially bringing
up 88e6176 on a new board.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 02:58:49 -07:00
Russell King
4bac50bace net: dsa: mv88e6xxx: remove link polling
The link status is polled by the generic phy layer, there's no need to
duplicate that polling with additional polling.  This additional polling
adds additional MDIO traffic, and races with the generic phy layer,
resulting in missing or duplicated link status messages.

Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 02:58:47 -07:00
Kalle Valo
7e64e5e66a * more clean-ups towards multiple RX queues;
* some rate scaling fixes and improvements;
 * some time-of-flight fixes;
 * other generic improvements and clean-ups;
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Merge tag 'iwlwifi-next-for-kalle-2015-10-05' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next

* more clean-ups towards multiple RX queues;
* some rate scaling fixes and improvements;
* some time-of-flight fixes;
* other generic improvements and clean-ups;
2015-10-07 12:14:23 +03:00
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
Marcel Holtmann
9bc63ca090 Bluetooth: btbcm: Read the local name in setup stage
The Broadcom Bluetooth controllers have the chip name included in the
ROM firmware or later in the patchram firmware. For debugging purposes
read the local name and print it out. This is only done during setup
stage and only once before loading the firmware and once after loading
the firmware.

For the Broadcom based controllers from Apple, the name is only read once
after determining the chip id.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-10-07 07:41:11 +03:00
Simon Horman
92240e8dc0 ipvs: Remove possibly unused variables from ip_vs_conn_net_{init,cleanup}
If CONFIG_PROC_FS is undefined then the arguments of proc_create()
and remove_proc_entry() are unused. As a result the net variables of
ip_vs_conn_net_{init,cleanup} are unused.

net/netfilter/ipvs//ip_vs_conn.c: In function ‘ip_vs_conn_net_init’:
net/netfilter/ipvs//ip_vs_conn.c:1350:14: warning: unused variable ‘net’ [-Wunused-variable]
net/netfilter/ipvs//ip_vs_conn.c: In function ‘ip_vs_conn_net_cleanup’:
net/netfilter/ipvs//ip_vs_conn.c:1361:14: warning: unused variable ‘net’ [-Wunused-variable]
...

Resolve this by dereferencing net as needed rather than storing it
in a variable.

Fixes: 3d99376689 ("ipvs: Pass ipvs not net into ip_vs_control_net_(init|cleanup)")
Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Julian Anastasov <ja@ssi.bg>
2015-10-07 10:12:00 +09:00
David Ahern
ed1c9f0e78 ipvs: Remove possibly unused variable from ip_vs_out
Eric's net namespace changes in 1b75097dd7 leaves net unreferenced if
CONFIG_IP_VS_IPV6 is not enabled:

../net/netfilter/ipvs/ip_vs_core.c: In function ‘ip_vs_out’:
../net/netfilter/ipvs/ip_vs_core.c:1177:14: warning: unused variable ‘net’ [-Wunused-variable]

After the net refactoring there is only 1 user; push the reference to the
1 user. While the line length slightly exceeds 80 it seems to be the
best change.

Fixes: 1b75097dd7a26("ipvs: Pass ipvs into ip_vs_out")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
[horms: updated subject]
Signed-off-by: Simon Horman <horms@verge.net.au>
2015-10-07 10:11:59 +09:00
Axel Lin
d7e7f02f71 nfc: s3fwrn5: i2c: Use devm_request_threaded_irq to avoid irq leak
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2015-10-07 01:41:58 +02:00
Axel Lin
45ee28570d nfc: s3fwrn5: Make NFC_S3FWRN5 select CRYPTO
Make NFC_S3FWRN5 select CRYPTO to fix below build errors:

ERROR: "crypto_destroy_tfm" [drivers/nfc/s3fwrn5/s3fwrn5.ko] undefined!
ERROR: "crypto_alloc_base" [drivers/nfc/s3fwrn5/s3fwrn5.ko] undefined!
scripts/Makefile.modpost:91: recipe for target '__modpost' failed
make[1]: *** [__modpost] Error 1

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2015-10-07 01:41:45 +02:00
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
Valentin Rothberg
753da421ba NFC: s3fwrn5: Remove superfluous cflags
NFC_DEBUG is not defined in Kconfig and since DEBUG is not used
anywhere in this directory, we can safely remove this line.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Acked-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2015-10-07 00:51:23 +02:00
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
Jon Ringle
77792b1140 regmap: Allow installing custom reg_update_bits function
This commit allows installing a custom reg_update_bits function for cases where
the hardware provides a mechanism to set or clear register bits without a
read/modify/write cycle. Such is the case with the Microchip ENCX24J600.

If a custom reg_update_bits function is provided, it will only be used against
volatile registers.

Signed-off-by: Jon Ringle <jringle@gridpoint.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-06 16:12:34 +01:00
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 S. Miller
21c4c073f1 Revert "regmap: Allow installing custom reg_update_bits function"
This reverts commit 7741c373cf.
2015-10-06 06:25:43 -07:00
David S. Miller
6a27a6c3be Revert "net: Microchip encx24j600 driver"
This reverts commit 04fbfce7a2.
2015-10-06 06:25:36 -07:00
David S. Miller
c664bc6d94 Revert "net: encx24j600_exit() can be static"
This reverts commit 9886ce2b9d.
2015-10-06 06:25:29 -07:00
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
Peter Oh
683b95e807 ath10k: use pre-allocated DMA buffer in Tx
ath10k driver is using dma_pool_alloc per packet and dma_pool_free
in coresponding at Tx completion.
Use of pre-allocated DMA buffer in Tx will improve saving CPU resource
by 5% while it consumes about 56KB memory more as trade off.

Signed-off-by: Peter Oh <poh@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2015-10-06 15:04:12 +03:00
Peter Oh
bc27e8cddd ath10k: use Rx decap mode configured when driver registered
ath10k is using Native WiFi mode as default mode for both of
Tx and Rx path, but it could be changed when driver registers
with a module parameter for specific purpose such as mesh.

The Rx decap mode sent to firmware during WMI initialization should
use the same mode that driver configured at its registration stage
in case of using raw mode, so that host driver receives MAC frame
header containing necessary fields such as QoS and Mesh Control
and uses them in right way to make data traffic work.

Signed-off-by: Peter Oh <poh@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2015-10-06 14:44:19 +03:00