linux-2.6-microblaze.git
9 years agoxprtrdma: Remove rpcrdma_ia::ri_memreg_strategy
Chuck Lever [Tue, 26 May 2015 15:53:04 +0000 (11:53 -0400)]
xprtrdma: Remove rpcrdma_ia::ri_memreg_strategy

Clean up: This field is no longer used.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Devesh Sharma <devesh.sharma@avagotech.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Remove ->ro_reset
Chuck Lever [Tue, 26 May 2015 15:52:54 +0000 (11:52 -0400)]
xprtrdma: Remove ->ro_reset

An RPC can exit at any time. When it does so, xprt_rdma_free() is
called, and it calls ->op_unmap().

If ->ro_reset() is running due to a transport disconnect, the two
methods can race while processing the same rpcrdma_mw. The results
are unpredictable.

Because of this, in previous patches I've altered ->ro_map() to
handle MR reset. ->ro_reset() is no longer needed and can be
removed.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Devesh Sharma <devesh.sharma@avagotech.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Remove unused LOCAL_INV recovery logic
Chuck Lever [Tue, 26 May 2015 15:52:44 +0000 (11:52 -0400)]
xprtrdma: Remove unused LOCAL_INV recovery logic

Clean up: Remove functions no longer used to recover broken FRMRs.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Devesh Sharma <devesh.sharma@avagotech.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Acquire MRs in rpcrdma_register_external()
Chuck Lever [Tue, 26 May 2015 15:52:35 +0000 (11:52 -0400)]
xprtrdma: Acquire MRs in rpcrdma_register_external()

Acquiring 64 MRs in rpcrdma_buffer_get() while holding the buffer
pool lock is expensive, and unnecessary because most modern adapters
can transfer 100s of KBs of payload using just a single MR.

Instead, acquire MRs one-at-a-time as chunks are registered, and
return them to rb_mws immediately during deregistration.

Note: commit 539431a437d2 ("xprtrdma: Don't invalidate FRMRs if
registration fails") is reverted: There is now a valid case where
registration can fail (with -ENOMEM) but the QP is still in RTS.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Introduce an FRMR recovery workqueue
Chuck Lever [Tue, 26 May 2015 15:52:25 +0000 (11:52 -0400)]
xprtrdma: Introduce an FRMR recovery workqueue

After a transport disconnect, FRMRs can be left in an undetermined
state. In particular, the MR's rkey is no good.

Currently, FRMRs are fixed up by the transport connect worker, but
that can race with ->ro_unmap if an RPC happens to exit while the
transport connect worker is running.

A better way of dealing with broken FRMRs is to detect them before
they are re-used by ->ro_map. Such FRMRs are either already invalid
or are owned by the sending RPC, and thus no race with ->ro_unmap
is possible.

Introduce a mechanism for handing broken FRMRs to a workqueue to be
reset in a context that is appropriate for allocating resources
(ie. an ib_alloc_fast_reg_mr() API call).

This mechanism is not yet used, but will be in subsequent patches.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-By: Devesh Sharma <devesh.sharma@avagotech.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Acquire FMRs in rpcrdma_fmr_register_external()
Chuck Lever [Tue, 26 May 2015 15:52:16 +0000 (11:52 -0400)]
xprtrdma: Acquire FMRs in rpcrdma_fmr_register_external()

Acquiring 64 FMRs in rpcrdma_buffer_get() while holding the buffer
pool lock is expensive, and unnecessary because FMR mode can
transfer up to a 1MB payload using just a single ib_fmr.

Instead, acquire ib_fmrs one-at-a-time as chunks are registered, and
return them to rb_mws immediately during deregistration.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Introduce helpers for allocating MWs
Chuck Lever [Tue, 26 May 2015 15:52:06 +0000 (11:52 -0400)]
xprtrdma: Introduce helpers for allocating MWs

We eventually want to handle allocating MWs one at a time, as
needed, instead of grabbing 64 and throwing them at each RPC in the
pipeline.

Add a helper for grabbing an MW off rb_mws, and a helper for
returning an MW to rb_mws. These will be used in a subsequent patch.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Use ib_device pointer safely
Chuck Lever [Tue, 26 May 2015 15:51:56 +0000 (11:51 -0400)]
xprtrdma: Use ib_device pointer safely

The connect worker can replace ri_id, but prevents ri_id->device
from changing during the lifetime of a transport instance. The old
ID is kept around until a new ID is created and the ->device is
confirmed to be the same.

Cache a copy of ri_id->device in rpcrdma_ia and in rpcrdma_rep.
The cached copy can be used safely in code that does not serialize
with the connect worker.

Other code can use it to save an extra address generation (one
pointer dereference instead of two).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Remove rr_func
Chuck Lever [Tue, 26 May 2015 15:51:46 +0000 (11:51 -0400)]
xprtrdma: Remove rr_func

A posted rpcrdma_rep never has rr_func set to anything but
rpcrdma_reply_handler.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Replace rpcrdma_rep::rr_buffer with rr_rxprt
Chuck Lever [Tue, 26 May 2015 15:51:37 +0000 (11:51 -0400)]
xprtrdma: Replace rpcrdma_rep::rr_buffer with rr_rxprt

Clean up: Instead of carrying a pointer to the buffer pool and
the rpc_xprt, carry a pointer to the controlling rpcrdma_xprt.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoxprtrdma: Warn when there are orphaned IB objects
Chuck Lever [Tue, 26 May 2015 15:51:27 +0000 (11:51 -0400)]
xprtrdma: Warn when there are orphaned IB objects

WARN during transport destruction if ib_dealloc_pd() fails. This is
a sign that xprtrdma orphaned one or more RDMA API objects at some
point, which can pin lower layer kernel modules and cause shutdown
to hang.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Devesh Sharma <devesh.sharma@avagotech.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
9 years agoLinux 4.1-rc7
Linus Torvalds [Mon, 8 Jun 2015 03:23:50 +0000 (20:23 -0700)]
Linux 4.1-rc7

9 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sun, 7 Jun 2015 23:56:10 +0000 (16:56 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS updates from Ralf Baechle:
 "Eight fixes across arch/mips.  Nothing stands particuarly out nor is
  complicated but fixes keep coming in at a higher than comfortable
  rate"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: KVM: Do not sign extend on unsigned MMIO load
  MIPS: BPF: Fix stack pointer allocation
  MIPS: Loongson-3: Fix a cpu-hotplug issue in loongson3_ipi_interrupt()
  MIPS: Fix enabling of DEBUG_STACKOVERFLOW
  MIPS: c-r4k: Fix typo in probe_scache()
  MIPS: Avoid an FPE exception in FCSR mask probing
  MIPS: ath79: Add a missing new line in log message
  MIPS: ralink: Fix clearing the illegal access interrupt

9 years agoMerge tag 'driver-core-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 7 Jun 2015 05:37:45 +0000 (22:37 -0700)]
Merge tag 'driver-core-4.1-rc7' of git://git./linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are two fixes for the driver core that resolve some reported
  issues.

  One is a regression from 4.0, the other a fixes a reported oops that
  has been there since 3.19.

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

* tag 'driver-core-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  drivers/base: cacheinfo: handle absence of caches
  drivers: of/base: move of_init to driver_init

9 years agoMerge tag 'staging-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sun, 7 Jun 2015 05:33:08 +0000 (22:33 -0700)]
Merge tag 'staging-4.1-rc7' of git://git./linux/kernel/git/gregkh/staging

Pull staging / IIO fixes from Greg KH:
 "Here are some IIO driver fixes to resolve reported issues, some ozwpan
  fixes for some reported CVE problems, and a rtl8712 driver fix for a
  reported regression.

  All have been in linux-next successfully"

* tag 'staging-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: rtl8712: fix stack dump
  ozwpan: unchecked signed subtraction leads to DoS
  ozwpan: divide-by-zero leading to panic
  ozwpan: Use unsigned ints to prevent heap overflow
  ozwpan: Use proper check to prevent heap overflow
  iio: adc: twl6030-gpadc: Fix modalias
  iio: adis16400: Fix burst transfer for adis16448
  iio: adis16400: Fix burst mode
  iio: adis16400: Compute the scan mask from channel indices
  iio: adis16400: Use != channel indices for the two voltage channels
  iio: adis16400: Report pressure channel scale

9 years agoMerge tag 'tty-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sun, 7 Jun 2015 05:14:23 +0000 (22:14 -0700)]
Merge tag 'tty-4.1-rc7' of git://git./linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are a few TTY and Serial driver fixes for reported regressions
  and crashes.

  All of these have been in linux-next with no reported problems"

* tag 'tty-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  n_tty: Fix auditing support for cannonical mode
  serial: 8250_omap: provide complete custom startup & shutdown callbacks
  n_tty: Fix calculation of size in canon_copy_from_read_buf
  serial: imx: Fix DMA handling for IDLE condition aborts
  serial/amba-pl011: Unconditionally poll for FIFO space before each TX char

9 years agoMerge tag 'usb-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sun, 7 Jun 2015 05:06:53 +0000 (22:06 -0700)]
Merge tag 'usb-4.1-rc7' of git://git./linux/kernel/git/gregkh/usb

Pull USB and PHY driver fixes from Greg KH:
 "Here are some USB and PHY driver fixes that resolve some reported
  regressions.  Also in here are some new device ids.

  All of the details are in the shortlog and these patches have been in
  linux-next with no problems"

* tag 'usb-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (22 commits)
  USB: cp210x: add ID for HubZ dual ZigBee and Z-Wave dongle
  usb: renesas_usbhs: Don't disable the pipe if Control write status stage
  usb: renesas_usbhs: Fix fifo unclear in usbhsf_prepare_pop
  usb: gadget: f_fs: fix check in read operation
  usb: musb: fix order of conditions for assigning end point operations
  usb: gadget: f_uac1: check return code from config_ep_by_speed
  usb: gadget: ffs: fix: Always call ffs_closed() in ffs_data_clear()
  usb: gadget: g_ffs: Fix counting of missing_functions
  usb: s3c2410_udc: correct reversed pullup logic
  usb: dwc3: gadget: Fix incorrect DEPCMD and DGCMD status macros
  usb: phy: tahvo: Pass the IRQF_ONESHOT flag
  usb: phy: ab8500-usb: Pass the IRQF_ONESHOT flag
  usb: renesas_usbhs: Revise the binding document about the dma-names
  usb: host: xhci: add mutex for non-thread-safe data
  usb: make module xhci_hcd removable
  USB: serial: ftdi_sio: Add support for a Motion Tracker Development Board
  usb: gadget: f_midi: fix segfault when reading empty id
  phy: phy-rcar-gen2: Fix USBHS_UGSTS_LOCK value
  phy: omap-usb2: invoke pm_runtime_disable on error path
  phy: fix Kconfig dependencies
  ...

9 years agoMerge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 7 Jun 2015 04:43:29 +0000 (21:43 -0700)]
Merge tag 'devicetree-for-linus' of git://git./linux/kernel/git/glikely/linux

Pull devicetree fix from Grant Likely:
 "Stupid typo fix for v4.1.  One of the IS_ENABLED() macro calls forgot
  the CONFIG_ prefix.  Only affects a tiny number of platforms, but
  still..."

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
  of/dynamic: Fix test for PPC_PSERIES

9 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 6 Jun 2015 16:15:14 +0000 (09:15 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "i915 has a bunch of fixes, and Russell found a bug in sysfs writing
  handling that results in userspace getting stuck"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm: fix writing to /sys/class/drm/*/status
  drm/i915: Move WaBarrierPerformanceFixDisable:skl to skl code from chv code
  drm/i915: Include G4X/VLV/CHV in self refresh status
  drm/i915: Initialize HWS page address after GPU reset
  drm/i915: Don't skip request retirement if the active list is empty
  drm/i915/hsw: Fix workaround for server AUX channel clock divisor

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sat, 6 Jun 2015 16:08:23 +0000 (09:08 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input subsystem fixes from Dmitry Torokhov:
 "Just a couple touchpad drivers fixups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: alps - do not reduce trackpoint speed by half
  Input: elantech - add new icbody type
  Input: elantech - fix detection of touchpads where the revision matches a known rate

9 years agoMerge branch 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 6 Jun 2015 16:06:20 +0000 (09:06 -0700)]
Merge branch 'stable/for-linus-4.1' of git://git./linux/kernel/git/konrad/swiotlb

Pull swiotlb fix from Konrad Rzeszutek Wilk:
 "Tiny little fix which just converts an function to be static.  Really
  tiny"

* 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: do not export map_single function

9 years agoMerge branch 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 6 Jun 2015 16:03:54 +0000 (09:03 -0700)]
Merge branch 'stable/for-linus-4.1' of git://git./linux/kernel/git/konrad/ibft

Pull iBFT fix from Konrad Rzeszutek Wilk:
 "One single fix from Chris to workaround UEFI platforms failing with
  iSCSI IBFT"

* 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
  iscsi_ibft: filter null v4-mapped v6 addresses

9 years agoMIPS: KVM: Do not sign extend on unsigned MMIO load
Nicholas Mc Guire [Thu, 7 May 2015 12:47:50 +0000 (14:47 +0200)]
MIPS: KVM: Do not sign extend on unsigned MMIO load

Fix possible unintended sign extension in unsigned MMIO loads by casting
to uint16_t in the case of mmio_needed != 2.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Tested-by: James Hogan <james.hogan@imgtec.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9985/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: BPF: Fix stack pointer allocation
Markos Chandras [Thu, 4 Jun 2015 10:56:13 +0000 (11:56 +0100)]
MIPS: BPF: Fix stack pointer allocation

Fix stack pointer offset which could potentially corrupt
argument registers in the previous frame. The calculated offset
reflects the size of all the registers we need to preserve so there
is no need for this erroneous subtraction.

[ralf@linux-mips.org: Fixed conflict due to only applying this fix part
of the entire series as part of 4.1 fixes.]

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/10527/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Loongson-3: Fix a cpu-hotplug issue in loongson3_ipi_interrupt()
Huacai Chen [Thu, 4 Jun 2015 06:53:47 +0000 (14:53 +0800)]
MIPS: Loongson-3: Fix a cpu-hotplug issue in loongson3_ipi_interrupt()

setup_per_cpu_areas() only setup __per_cpu_offset[] for each possible
cpu, but loongson_sysconf.nr_cpus can be greater than possible cpus
(due to reserved_cpus_mask). So in loongson3_ipi_interrupt(), percpu
access will touch the original varible in .data..percpu section which
has been freed. Without this patch, cpu-hotplug will cause memery
corruption.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/10524/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Fix enabling of DEBUG_STACKOVERFLOW
James Hogan [Thu, 4 Jun 2015 12:25:27 +0000 (13:25 +0100)]
MIPS: Fix enabling of DEBUG_STACKOVERFLOW

Commit 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") added
kernel stack overflow detection, however it only enabled it conditional
upon the preprocessor definition DEBUG_STACKOVERFLOW, which is never
actually defined. The Kconfig option is called DEBUG_STACKOVERFLOW,
which manifests to the preprocessor as CONFIG_DEBUG_STACKOVERFLOW, so
switch it to using that definition instead.

Fixes: 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Adam Jiang <jiang.adam@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 2.6.37+
Patchwork: http://patchwork.linux-mips.org/patch/10531/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: c-r4k: Fix typo in probe_scache()
Joshua Kinard [Tue, 2 Jun 2015 20:55:22 +0000 (16:55 -0400)]
MIPS: c-r4k: Fix typo in probe_scache()

Fixes a typo in arch/mips/mm/c-r4k.c's probe_scache().

Signed-off-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoiscsi_ibft: filter null v4-mapped v6 addresses
Chris Leech [Thu, 28 May 2015 19:51:51 +0000 (12:51 -0700)]
iscsi_ibft: filter null v4-mapped v6 addresses

I've had reports of UEFI platforms failing iSCSI boot in various
configurations, that ended up being caused by network initialization
scripts getting tripped up by unexpected null addresses (0.0.0.0) being
reported for gateways, dhcp servers, and dns servers.

The tianocore EDK2 iSCSI driver generates an iBFT table that always uses
IPv4-mapped IPv6 addresses for the NIC structure fields.  This results
in values that are "not present or not specified" being reported as
::ffff:0.0.0.0 rather than all zeros as specified.

The iscsi_ibft module filters unspecified fields from the iBFT from
sysfs, preventing userspace from using invalid values and making it easy
to check for the presence of a value.  This currently fails in regard to
these mapped null addresses.

In order to remain consistent with how the iBFT information is exposed,
we should accommodate the behavior of the tianocore iSCSI driver as it's
already in the wild in a large number of servers.

Tested under qemu using an OVMF build of tianocore EDK2.

Signed-off-by: Chris Leech <cleech@redhat.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
9 years agoswiotlb: do not export map_single function
Alexandre Courbot [Tue, 26 May 2015 09:02:54 +0000 (18:02 +0900)]
swiotlb: do not export map_single function

The map_single() function is not defined as static, even though it
doesn't seem to be used anywhere else in the kernel. Make it static to
avoid namespace pollution since this is a rather generic symbol.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
9 years agodrm: fix writing to /sys/class/drm/*/status
Russell King [Fri, 5 Jun 2015 22:27:30 +0000 (08:27 +1000)]
drm: fix writing to /sys/class/drm/*/status

Writing to a file is supposed to return the number of bytes written.
Returning zero unfortunately causes bash to constantly spin trying
to write to the sysfs file, to such an extent that even ^c and ^z
have no effect.  The only way out of that is to kill the shell and
log back in.  This isn't nice behaviour.

Fix it by returning the number of characters written to sysfs files.

[airlied: used suggestion from Al Viro]
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agoMerge tag 'drm-intel-fixes-2015-06-05' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 5 Jun 2015 21:14:13 +0000 (07:14 +1000)]
Merge tag 'drm-intel-fixes-2015-06-05' of git://anongit.freedesktop.org/drm-intel into drm-fixes

bunch of i915 fixes.
* tag 'drm-intel-fixes-2015-06-05' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Move WaBarrierPerformanceFixDisable:skl to skl code from chv code
  drm/i915: Include G4X/VLV/CHV in self refresh status
  drm/i915: Initialize HWS page address after GPU reset
  drm/i915: Don't skip request retirement if the active list is empty
  drm/i915/hsw: Fix workaround for server AUX channel clock divisor

9 years agoMerge tag 'pci-v4.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Linus Torvalds [Fri, 5 Jun 2015 17:22:06 +0000 (10:22 -0700)]
Merge tag 'pci-v4.1-fixes-2' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "Resource management
   - Fix IOV sorting by alignment (Wei Yang)
   - Preserve resource size during alignment reordering (Yinghai Lu)

  Miscellaneous
    - MAINTAINERS: Add Pratyush for SPEAr13xx and DesignWare PCIe (Pratyush Anand)"

* tag 'pci-v4.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Preserve resource size during alignment reordering
  PCI: Fix IOV resource sorting by alignment requirement
  MAINTAINERS: Add Pratyush Anand as SPEAr13xx and DesignWare PCIe maintainer

9 years agoMerge tag 'sound-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 5 Jun 2015 17:16:52 +0000 (10:16 -0700)]
Merge tag 'sound-4.1-rc7' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "It was a fairly calm week; here you can find only a few trivial quirks
  and fixes for USB and HD-audio.  All changes are pretty device
  specific"

* tag 'sound-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: usb-audio: fix missing input volume controls in MAYA44 USB(+)
  ALSA: usb-audio: add MAYA44 USB+ mixer control names
  ALSA: hda/realtek - Add a fixup for another Acer Aspire 9420
  ALSA: hda - Fix jack detection at resume with VT codecs
  ALSA: usb-audio: don't try to get Outlaw RR2150 sample rate
  ALSA: usb-audio: Add mic volume fix quirk for Logitech Quickcam Fusion
  ALSA: hda/realtek - Suooprt Dell headset mode for ALC256

9 years agoMerge tag 'iommu-fixes-v4.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 5 Jun 2015 17:14:51 +0000 (10:14 -0700)]
Merge tag 'iommu-fixes-v4.1-rc6' of git://git./linux/kernel/git/joro/iommu

Pull iommu fix from Joerg Roedel:
 "Only one patch:

   - Revert "iommu/amd: Don't allocate with __GFP_ZERO in
     alloc_coherent".

     This patch caused problems with some drivers, so it is better to
     revert it now until the drivers have been fixed"

* tag 'iommu-fixes-v4.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  Revert "iommu/amd: Don't allocate with __GFP_ZERO in alloc_coherent"

9 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 5 Jun 2015 17:03:48 +0000 (10:03 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - early_idt_handlers[] fix that fixes the build with bleeding edge
     tooling

   - build warning fix on GCC 5.1

   - vm86 fix plus self-test to make it harder to break it again"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers
  x86/asm/entry/32, selftests: Add a selftest for kernel entries from VM86 mode
  x86/boot: Add CONFIG_PARAVIRT_SPINLOCKS quirk to arch/x86/boot/compressed/misc.h
  x86/asm/entry/32: Really make user_mode() work correctly for VM86 mode

9 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 5 Jun 2015 17:00:53 +0000 (10:00 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "The biggest chunk of the changes are two regression fixes: a HT
  workaround fix and an event-group scheduling fix.  It's been verified
  with 5 days of fuzzer testing.

  Other fixes:

   - eBPF fix
   - a BIOS breakage detection fix
   - PMU driver fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/pt: Fix a refactoring bug
  perf/x86: Tweak broken BIOS rules during check_hw_exists()
  perf/x86/intel/pt: Untangle pt_buffer_reset_markers()
  perf: Disallow sparse AUX allocations for non-SG PMUs in overwrite mode
  perf/x86: Improve HT workaround GP counter constraint
  perf/x86: Fix event/group validation
  perf: Fix race in BPF program unregister

9 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 5 Jun 2015 16:58:36 +0000 (09:58 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Just two small fixes: one radeon, one amdkfd"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/amdkfd: fix topology bug with capability attr.
  drm/radeon: use proper ACR regisiter for DCE3.2

9 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Fri, 5 Jun 2015 16:54:43 +0000 (09:54 -0700)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c bug fixes from Wolfram Sang:
 "Two small bugfixes for I2C"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: s3c2410: fix oops in suspend callback for non-dt platforms
  i2c: hix5hd2: Fix modalias to make module auto-loading work

9 years agoMerge tag 'usb-serial-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/johan...
Greg Kroah-Hartman [Fri, 5 Jun 2015 14:19:45 +0000 (23:19 +0900)]
Merge tag 'usb-serial-4.1-rc7' of git://git./linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB-serial fixes for v4.1-rc7

Here are a couple of new device ids.

Signed-off-by: Johan Hovold <johan@kernel.org>
9 years agoInput: alps - do not reduce trackpoint speed by half
Hans de Goede [Fri, 5 Jun 2015 05:31:43 +0000 (22:31 -0700)]
Input: alps - do not reduce trackpoint speed by half

On some v7 devices (e.g. Lenovo-E550) the deltas reported are typically
only in the 0-1 range dividing this by 2 results in a range of 0-0.

And even for v7 devices where this does not lead to making the trackstick
entirely unusable, it makes it twice as slow as before we added v7 support
and were using the ps/2 mouse emulation of the dual point setup.

If some kind of generic slowdown is actually necessary for some devices,
then that belongs in userspace, not in the kernel.

Cc: stable@vger.kernel.org
Reported-and-tested-by: Rico Moorman <rico.moorman@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agoInput: elantech - add new icbody type
洪一竹 [Fri, 5 Jun 2015 05:00:24 +0000 (22:00 -0700)]
Input: elantech - add new icbody type

This adds new icbody type to the list recognized by Elantech PS/2 driver.

Cc: stable@vger.kernel.org
Signed-off-by: Sam Hung <sam.hung@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agoof/dynamic: Fix test for PPC_PSERIES
Geert Uytterhoeven [Thu, 4 Jun 2015 09:34:41 +0000 (11:34 +0200)]
of/dynamic: Fix test for PPC_PSERIES

"IS_ENABLED(PPC_PSERIES)" always evaluates to false, as IS_ENABLED() is
supposed to be used with the full Kconfig symbol name, including the
"CONFIG_" prefix.

Add the missing "CONFIG_" prefix to fix this.

Fixes: a25095d451ece23b ("of: Move dynamic node fixups out of powerpc and into common code")

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: stable@vger.kernel.org #+3.17
Signed-off-by: Grant Likely <grant.likely@linaro.org>
9 years agocompat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()
Helge Deller [Thu, 4 Jun 2015 21:57:18 +0000 (23:57 +0200)]
compat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()

In the functions compat_get_bitmap() and compat_put_bitmap() the
variable nr_compat_longs stores how many compat_ulong_t words should be
copied in a loop.

The copy loop itself is this:
  if (nr_compat_longs-- > 0) {
      if (__get_user(um, umask)) return -EFAULT;
  } else {
      um = 0;
  }

Since nr_compat_longs gets unconditionally decremented in each loop and
since it's type is unsigned this could theoretically lead to out of
bounds accesses to userspace if nr_compat_longs wraps around to
(unsigned)(-1).

Although the callers currently do not trigger out-of-bounds accesses, we
should better implement the loop in a safe way to completely avoid such
warp-arounds.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
9 years agoUSB: cp210x: add ID for HubZ dual ZigBee and Z-Wave dongle
John D. Blair [Thu, 4 Jun 2015 20:18:19 +0000 (13:18 -0700)]
USB: cp210x: add ID for HubZ dual ZigBee and Z-Wave dongle

Added the USB serial device ID for the HubZ dual ZigBee
and Z-Wave radio dongle.

Signed-off-by: John D. Blair <johnb@candicontrols.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
9 years agoMerge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Thu, 4 Jun 2015 17:19:34 +0000 (10:19 -0700)]
Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "We have two small fixes:

   - pl330 termination hang fix by Krzysztof

   - hsu memory leak fix by Peter"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: hsu: Fix memory leak when stopping a running transfer
  dmaengine: pl330: Fix hang on dmaengine_terminate_all on certain boards

9 years agoperf/x86/intel/pt: Fix a refactoring bug
Alexander Shishkin [Thu, 4 Jun 2015 13:31:47 +0000 (16:31 +0300)]
perf/x86/intel/pt: Fix a refactoring bug

Commit 066450be41 ("perf/x86/intel/pt: Clean up the control flow
in pt_pmu_hw_init()") changed attribute initialization so that
only the first attribute gets initialized using
sysfs_attr_init(), which upsets lockdep.

This patch fixes the glitch so that all allocated attributes are
properly initialized thus fixing the lockdep warning reported by
Tvrtko and Imre.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reported-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: <linux-kernel@vger.kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agodrm/i915: Move WaBarrierPerformanceFixDisable:skl to skl code from chv code
Ville Syrjälä [Tue, 2 Jun 2015 12:37:35 +0000 (15:37 +0300)]
drm/i915: Move WaBarrierPerformanceFixDisable:skl to skl code from chv code

 commit 65ca7514e21adbee25b8175fc909759c735d00ff
 Author: Damien Lespiau <damien.lespiau@intel.com>
 Date:   Mon Feb 9 19:33:22 2015 +0000

    drm/i915/skl: Implement WaBarrierPerformanceFixDisable

got misapplied and the code landed in chv_init_workarounds() instead of
the intended skl_init_workarounds(). Move it over to the right place.

Cc: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agodrm/i915: Include G4X/VLV/CHV in self refresh status
Ander Conselvan de Oliveira [Tue, 2 Jun 2015 11:17:47 +0000 (14:17 +0300)]
drm/i915: Include G4X/VLV/CHV in self refresh status

Add all missing platforms handled by intel_set_memory_cxsr() to the
i915_sr_status debugfs entry.

v2: Add G4X too. (Ville)
    Clarify the change also affects CHV. (Ander)

References: https://bugs.freedesktop.org/show_bug.cgi?id=89792
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agodrm/i915: Initialize HWS page address after GPU reset
Arun Siluvery [Tue, 2 Jun 2015 19:06:59 +0000 (20:06 +0100)]
drm/i915: Initialize HWS page address after GPU reset

After GPU reset, HW is losing the address of HWS page in the register.
The page itself is valid except that HW is not aware of its location.

[   64.368623] [drm:gen8_init_common_ring [i915]] *ERROR* HWS Page address = 0x00000000
[   64.368655] [drm:gen8_init_common_ring [i915]] *ERROR* HWS Page address = 0x00000000
[   64.368681] [drm:gen8_init_common_ring [i915]] *ERROR* HWS Page address = 0x00000000
[   64.368704] [drm:gen8_init_common_ring [i915]] *ERROR* HWS Page address = 0x00000000

This patch reloads this value into the register during ring init.

Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agoMerge tag 'drm-amdkfd-fixes-2015-06-03' of git://people.freedesktop.org/~gabbayo...
Dave Airlie [Thu, 4 Jun 2015 02:29:04 +0000 (12:29 +1000)]
Merge tag 'drm-amdkfd-fixes-2015-06-03' of git://people.freedesktop.org/~gabbayo/linux into drm-fixes

One minor fix for last -rc of 4.1. The fix moves the update of an attribute in
topology to *after* it is actually initialized.

* tag 'drm-amdkfd-fixes-2015-06-03' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: fix topology bug with capability attr.

9 years agoMerge branch 'drm-fixes-4.1' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 4 Jun 2015 02:28:41 +0000 (12:28 +1000)]
Merge branch 'drm-fixes-4.1' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

One more small r7xx audio regression fix for 4.1

* 'drm-fixes-4.1' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: use proper ACR regisiter for DCE3.2

9 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Wed, 3 Jun 2015 23:35:00 +0000 (16:35 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block layer fixes from Jens Axboe:
 "Sending this off now, as I'm not aware of other current bugs, nor do I
  expect further fixes before 4.1 final.  This contains two fixes:

   - a fix for a bdi unregister warning that gets spewed on md, due to a
     regression introduced earlier in this cycle.  From Neil Brown.

   - a fix for a compile warning for NVMe on 32-bit platforms, also a
     regression introduced in this cycle.  From Arnd Bergmann"

* 'for-linus' of git://git.kernel.dk/linux-block:
  NVMe: fix type warning on 32-bit
  block: discard bdi_unregister() in favour of bdi_destroy()

9 years agoMAINTAINERS - remove OSDL reference
Stephen Hemminger [Wed, 3 Jun 2015 20:32:02 +0000 (13:32 -0700)]
MAINTAINERS - remove OSDL reference

OSDL has been gone for many years, looks like there still was
one reference to it.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agodrm/amdkfd: fix topology bug with capability attr.
Alexey Skidanov [Sun, 30 Nov 2014 13:03:51 +0000 (15:03 +0200)]
drm/amdkfd: fix topology bug with capability attr.

This patch fixes a bug where the number of watch points
was shown before it was actually calculated

Signed-off-by: Alexey Skidanov <Alexey.Skidanov@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
9 years agolib: Clarify the return value of strnlen_user()
Jan Kara [Wed, 3 Jun 2015 13:50:35 +0000 (15:50 +0200)]
lib: Clarify the return value of strnlen_user()

strnlen_user() can return a number in a range 0 to count +
sizeof(unsigned long) - 1. Clarify the comment at the top of the
function so that users don't think the function returns at most count+1.

Signed-off-by: Jan Kara <jack@suse.cz>
[ Also added commentary about preferably not using this function ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoALSA: usb-audio: fix missing input volume controls in MAYA44 USB(+)
Clemens Ladisch [Wed, 3 Jun 2015 09:36:51 +0000 (11:36 +0200)]
ALSA: usb-audio: fix missing input volume controls in MAYA44 USB(+)

The driver worked around an error in the MAYA44 USB(+)'s mixer unit
descriptor by aborting before parsing the missing field.  However,
aborting parsing too early prevented parsing of the other units
connected to this unit, so the capture mixer controls would be missing.

Fix this by moving the check for this descriptor error after the parsing
of the unit's input pins.

Reported-by: nightmixes <nightmixes@gmail.com>
Tested-by: nightmixes <nightmixes@gmail.com>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoALSA: usb-audio: add MAYA44 USB+ mixer control names
Clemens Ladisch [Wed, 3 Jun 2015 09:36:42 +0000 (11:36 +0200)]
ALSA: usb-audio: add MAYA44 USB+ mixer control names

Add mixer control names for the ESI Maya44 USB+ (which appears to be
identical width the AudioTrak Maya44 USB).

Reported-by: nightmixes <nightmixes@gmail.com>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoMIPS: Avoid an FPE exception in FCSR mask probing
Maciej W. Rozycki [Tue, 2 Jun 2015 16:50:59 +0000 (17:50 +0100)]
MIPS: Avoid an FPE exception in FCSR mask probing

Use the default FCSR value in mask probing, avoiding an FPE exception
where reset has left any exception enable and their corresponding cause
bits set and the register is then rewritten with these bits active.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMerge tag 'please-pull-rusty' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl...
Linus Torvalds [Tue, 2 Jun 2015 17:58:34 +0000 (10:58 -0700)]
Merge tag 'please-pull-rusty' of git://git./linux/kernel/git/aegl/linux

Pull ia64 fix from Tony Luck:
 "Fix some build warnings for ia64 - cpu_callin_map doesn't need to be
  volatile"

* tag 'please-pull-rusty' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
  ia64: make cpu_callin_map non-volatile.

9 years agoALSA: hda/realtek - Add a fixup for another Acer Aspire 9420
Takashi Iwai [Tue, 2 Jun 2015 17:57:08 +0000 (19:57 +0200)]
ALSA: hda/realtek - Add a fixup for another Acer Aspire 9420

Acer Aspire 9420 with ALC883 (1025:0107) needs the fixup for EAPD to
make the sound working like other Aspire models.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=94111
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoInput: elantech - fix detection of touchpads where the revision matches a known rate
Hans de Goede [Tue, 2 Jun 2015 17:40:50 +0000 (10:40 -0700)]
Input: elantech - fix detection of touchpads where the revision matches a known rate

Make the check to skip the rate check more lax, so that it applies
to all hw_version 4 models.

This fixes the touchpad not being detected properly on Asus PU551LA
laptops.

Cc: stable@vger.kernel.org
Reported-and-tested-by: David Zafra Gómez <dezeta@klo.es>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agovfs: read file_handle only once in handle_to_path
Sasha Levin [Wed, 28 Jan 2015 20:30:43 +0000 (15:30 -0500)]
vfs: read file_handle only once in handle_to_path

We used to read file_handle twice.  Once to get the amount of extra
bytes, and once to fetch the entire structure.

This may be problematic since we do size verifications only after the
first read, so if the number of extra bytes changes in userspace between
the first and second calls, we'll have an incoherent view of
file_handle.

Instead, read the constant size once, and copy that over to the final
structure without having to re-read it again.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agolib: Fix strnlen_user() to not touch memory after specified maximum
Jan Kara [Tue, 2 Jun 2015 15:10:28 +0000 (17:10 +0200)]
lib: Fix strnlen_user() to not touch memory after specified maximum

If the specified maximum length of the string is a multiple of unsigned
long, we would load one long behind the specified maximum.  If that
happens to be in a next page, we can hit a page fault although we were
not expected to.

Fix the off-by-one bug in the test whether we are at the end of the
specified range.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoia64: make cpu_callin_map non-volatile.
Rusty Russell [Mon, 1 Jun 2015 06:23:53 +0000 (15:53 +0930)]
ia64: make cpu_callin_map non-volatile.

cpumask_test_cpu() doesn't take volatile, unlike the obsoleted
cpu_isset.  The only place ia64 really cares is the spin waiting for a
bit; udelay() is probably a barrier but insert barrier() to be sure.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>
9 years agoMIPS: ath79: Add a missing new line in log message
Alban Bedel [Sun, 19 Apr 2015 12:30:01 +0000 (14:30 +0200)]
MIPS: ath79: Add a missing new line in log message

The memory setup log is missing a new line.

Signed-off-by: Alban Bedel <albeu@free.fr>
Cc: linux-mips@linux-mips.org
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9771/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agodmaengine: hsu: Fix memory leak when stopping a running transfer
Peter Ujfalusi [Tue, 26 May 2015 10:11:28 +0000 (13:11 +0300)]
dmaengine: hsu: Fix memory leak when stopping a running transfer

The vd->node is removed from the lists when the transfer started so the
vchan_get_all_descriptors() will not find it. This results memory leak.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
[andy: fix the typo to prevent a compilation error]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
9 years agox86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers
Andy Lutomirski [Fri, 22 May 2015 23:15:47 +0000 (16:15 -0700)]
x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers

The early_idt_handlers asm code generates an array of entry
points spaced nine bytes apart.  It's not really clear from that
code or from the places that reference it what's going on, and
the code only works in the first place because GAS never
generates two-byte JMP instructions when jumping to global
labels.

Clean up the code to generate the correct array stride (member size)
explicitly. This should be considerably more robust against
screw-ups, as GAS will warn if a .fill directive has a negative
count.  Using '. =' to advance would have been even more robust
(it would generate an actual error if it tried to move
backwards), but it would pad with nulls, confusing anyone who
tries to disassemble the code.  The new scheme should be much
clearer to future readers.

While we're at it, improve the comments and rename the array and
common code.

Binutils may start relaxing jumps to non-weak labels.  If so,
this change will fix our build, and we may need to backport this
change.

Before, on x86_64:

  0000000000000000 <early_idt_handlers>:
     0:   6a 00                   pushq  $0x0
     2:   6a 00                   pushq  $0x0
     4:   e9 00 00 00 00          jmpq   9 <early_idt_handlers+0x9>
                          5: R_X86_64_PC32        early_idt_handler-0x4
  ...
    48:   66 90                   xchg   %ax,%ax
    4a:   6a 08                   pushq  $0x8
    4c:   e9 00 00 00 00          jmpq   51 <early_idt_handlers+0x51>
                          4d: R_X86_64_PC32       early_idt_handler-0x4
  ...
   117:   6a 00                   pushq  $0x0
   119:   6a 1f                   pushq  $0x1f
   11b:   e9 00 00 00 00          jmpq   120 <early_idt_handler>
                          11c: R_X86_64_PC32      early_idt_handler-0x4

After:

  0000000000000000 <early_idt_handler_array>:
     0:   6a 00                   pushq  $0x0
     2:   6a 00                   pushq  $0x0
     4:   e9 14 01 00 00          jmpq   11d <early_idt_handler_common>
  ...
    48:   6a 08                   pushq  $0x8
    4a:   e9 d1 00 00 00          jmpq   120 <early_idt_handler_common>
    4f:   cc                      int3
    50:   cc                      int3
  ...
   117:   6a 00                   pushq  $0x0
   119:   6a 1f                   pushq  $0x1f
   11b:   eb 03                   jmp    120 <early_idt_handler_common>
   11d:   cc                      int3
   11e:   cc                      int3
   11f:   cc                      int3

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Binutils <binutils@sourceware.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/ac027962af343b0c599cbfcf50b945ad2ef3d7a8.1432336324.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agoRevert "iommu/amd: Don't allocate with __GFP_ZERO in alloc_coherent"
Joerg Roedel [Mon, 1 Jun 2015 15:30:57 +0000 (17:30 +0200)]
Revert "iommu/amd: Don't allocate with __GFP_ZERO in alloc_coherent"

This reverts commit 5fc872c7323534e8f7dc21bab635e7a9b9659e07.

The DMA-API does not strictly require that the memory
returned by dma_alloc_coherent is zeroed out. For that
another function (dma_zalloc_coherent) should be used. But
all other x86 DMA-API implementation I checked zero out the
memory, so that some drivers rely on it and break when it is
not.

It seems the (driver-)world is not yet ready for this
change, so revert it.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Tue, 2 Jun 2015 03:51:18 +0000 (20:51 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Various VTI tunnel (mark handling, PMTU) bug fixes from Alexander
    Duyck and Steffen Klassert.

 2) Revert ethtool PHY query change, it wasn't correct.  The PHY address
    selected by the driver running the PHY to MAC connection decides
    what PHY address GET ethtool operations return information from.

 3) Fix handling of sequence number bits for encryption IV generation in
    ESP driver, from Herbert Xu.

 4) UDP can return -EAGAIN when we hit a bad checksum on receive, even
    when there are other packets in the receive queue which is wrong.
    Just respect the error returned from the generic socket recv
    datagram helper.  From Eric Dumazet.

 5) Fix BNA driver firmware loading on big-endian systems, from Ivan
    Vecera.

 6) Fix regression in that we were inheriting the congestion control of
    the listening socket for new connections, the intended behavior
    always was to use the default in this case.  From Neal Cardwell.

 7) Fix NULL deref in brcmfmac driver, from Arend van Spriel.

 8) OTP parsing fix in iwlwifi from Liad Kaufman.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
  vti6: Add pmtu handling to vti6_xmit.
  Revert "net: core: 'ethtool' issue with querying phy settings"
  bnx2x: Move statistics implementation into semaphores
  xen: netback: read hotplug script once at start of day.
  xen: netback: fix printf format string warning
  Revert "netfilter: ensure number of counters is >0 in do_replace()"
  net: dsa: Properly propagate errors from dsa_switch_setup_one
  tcp: fix child sockets to use system default congestion control if not set
  udp: fix behavior of wrong checksums
  sfc: free multiple Rx buffers when required
  bna: fix soft lock-up during firmware initialization failure
  bna: remove unreasonable iocpf timer start
  bna: fix firmware loading on big-endian machines
  bridge: fix br_multicast_query_expired() bug
  via-rhine: Resigning as maintainer
  brcmfmac: avoid null pointer access when brcmf_msgbuf_get_pktid() fails
  mac80211: Fix mac80211.h docbook comments
  iwlwifi: nvm: fix otp parsing in 8000 hw family
  iwlwifi: pcie: fix tracking of cmd_in_flight
  ip_vti/ip6_vti: Preserve skb->mark after rcv_cb call
  ...

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Tue, 2 Jun 2015 03:44:51 +0000 (20:44 -0700)]
Merge git://git./linux/kernel/git/davem/sparc

Pull Sparc fixes from David Miller:

 1) Setup the core/threads/sockets bitmaps correctly so that 'lscpus'
    and friends operate properly.  Frtom Chris Hyser.

 2) The bit that normally means "Cached Virtually" on sun4v systems,
    actually changes meaning in M7 and later chips.  Fix from Khalid
    Aziz.

 3) One some PCI-E systems we need to probe different OF properties to
    fill in the PCI slot information properly, from Eric Snowberg.

 4) Kill an extraneous memset after kzalloc(), from Christophe Jaillet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
  sparc64: pci slots information is not populated in sysfs
  sparc: kernel: GRPCI2: Remove a useless memset
  sparc64: Setup sysfs to mark LDOM sockets, cores and threads correctly

9 years agodrm/radeon: use proper ACR regisiter for DCE3.2
Alex Deucher [Mon, 1 Jun 2015 22:10:24 +0000 (18:10 -0400)]
drm/radeon: use proper ACR regisiter for DCE3.2

Using the DCE2 one by accident afer the audio rework.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=90777

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
9 years agoMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Linus Torvalds [Tue, 2 Jun 2015 01:49:45 +0000 (18:49 -0700)]
Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost

Pull virtio fix from Michael Tsirkin:
 "Last-minute virtio fix for 4.1

  This tweaks an exported user-space header to fix build breakage for
  userspace using it"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  include/uapi/linux/virtio_balloon.h: include linux/virtio_types.h

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Mon, 1 Jun 2015 23:56:43 +0000 (16:56 -0700)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fix for net

The following patch reverts the ebtables chunk that enforces counters that was
introduced in the recently applied d26e2c9ffa38 ('Revert "netfilter: ensure
number of counters is >0 in do_replace()"') since this breaks ebtables.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge tag 'wireless-drivers-for-davem-2015-06-01' of git://git.kernel.org/pub/scm...
David S. Miller [Mon, 1 Jun 2015 23:06:29 +0000 (16:06 -0700)]
Merge tag 'wireless-drivers-for-davem-2015-06-01' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
iwlwifi:

* fix OTP parsing 8260
* fix powersave handling for 8260

brcmfmac:

* fix null pointer crash
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agovti6: Add pmtu handling to vti6_xmit.
Steffen Klassert [Fri, 29 May 2015 18:28:26 +0000 (11:28 -0700)]
vti6: Add pmtu handling to vti6_xmit.

We currently rely on the PMTU discovery of xfrm.
However if a packet is localy sent, the PMTU mechanism
of xfrm tries to to local socket notification what
might not work for applications like ping that don't
check for this. So add pmtu handling to vti6_xmit to
report MTU changes immediately.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoPCI: Preserve resource size during alignment reordering
Yinghai Lu [Fri, 29 May 2015 05:40:00 +0000 (22:40 -0700)]
PCI: Preserve resource size during alignment reordering

In d74b9027a4da ("PCI: Consider additional PF's IOV BAR alignment in sizing
and assigning"), we store additional alignment in realloc_head and take
this into consideration for assignment.

In __assign_resources_sorted(), we changed dev_res->res->start, then used
resource_start() (which depends on res->start), so the recomputed res->end
was completely bogus.  Even if we'd had the correct size, the end would
have been off by one.

Preserve the resource size when we adjust its alignment.

[bhelgaas: changelog]
Fixes: d74b9027a4da ("PCI: Consider additional PF's IOV BAR alignment in sizing and assigning")
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Wei Yang <weiyang@linux.vnet.ibm.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
9 years agoRevert "net: core: 'ethtool' issue with querying phy settings"
David S. Miller [Mon, 1 Jun 2015 21:43:50 +0000 (14:43 -0700)]
Revert "net: core: 'ethtool' issue with querying phy settings"

This reverts commit f96dee13b8e10f00840124255bed1d8b4c6afd6f.

It isn't right, ethtool is meant to manage one PHY instance
per netdevice at a time, and this is selected by the SET
command.  Therefore by definition the GET command must only
return the settings for the configured and selected PHY.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agobnx2x: Move statistics implementation into semaphores
Yuval Mintz [Mon, 1 Jun 2015 12:08:18 +0000 (15:08 +0300)]
bnx2x: Move statistics implementation into semaphores

Commit dff173de84958 ("bnx2x: Fix statistics locking scheme") changed the
bnx2x locking around statistics state into using a mutex - but the lock
is being accessed via a timer which is forbidden.

[If compiled with CONFIG_DEBUG_MUTEXES, logs show a warning about
accessing the mutex in interrupt context]

This moves the implementation into using a semaphore [with size '1']
instead.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoxen: netback: read hotplug script once at start of day.
Ian Campbell [Mon, 1 Jun 2015 10:30:24 +0000 (11:30 +0100)]
xen: netback: read hotplug script once at start of day.

When we come to tear things down in netback_remove() and generate the
uevent it is possible that the xenstore directory has already been
removed (details below).

In such cases netback_uevent() won't be able to read the hotplug
script and will write a xenstore error node.

A recent change to the hypervisor exposed this race such that we now
sometimes lose it (where apparently we didn't ever before).

Instead read the hotplug script configuration during setup and use it
for the lifetime of the backend device.

The apparently more obvious fix of moving the transition to
state=Closed in netback_remove() to after the uevent does not work
because it is possible that we are already in state=Closed (in
reaction to the guest having disconnected as it shutdown). Being
already in Closed means the toolstack is at liberty to start tearing
down the xenstore directories. In principal it might be possible to
arrange to unregister the device sooner (e.g on transition to Closing)
such that xenstore would still be there but this state machine is
fragile and prone to anger...

A modern Xen system only relies on the hotplug uevent for driver
domains, when the backend is in the same domain as the toolstack it
will run the necessary setup/teardown directly in the correct sequence
wrt xenstore changes.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoxen: netback: fix printf format string warning
Ian Campbell [Mon, 1 Jun 2015 10:30:04 +0000 (11:30 +0100)]
xen: netback: fix printf format string warning

drivers/net/xen-netback/netback.c: In function ‘xenvif_tx_build_gops’:
drivers/net/xen-netback/netback.c:1253:8: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 5 has type ‘int’ [-Wformat=]
        (txreq.offset&~PAGE_MASK) + txreq.size);
        ^

PAGE_MASK's type can vary by arch, so a cast is needed.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
----
v2: Cast to unsigned long, since PAGE_MASK can vary by arch.
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoRevert "netfilter: ensure number of counters is >0 in do_replace()"
Bernhard Thaler [Thu, 28 May 2015 08:26:18 +0000 (10:26 +0200)]
Revert "netfilter: ensure number of counters is >0 in do_replace()"

This partially reverts commit 1086bbe97a07 ("netfilter: ensure number of
counters is >0 in do_replace()") in net/bridge/netfilter/ebtables.c.

Setting rules with ebtables does not work any more with 1086bbe97a07 place.

There is an error message and no rules set in the end.

e.g.

~# ebtables -t nat -A POSTROUTING --src 12:34:56:78:9a:bc -j DROP
Unable to update the kernel. Two possible causes:
1. Multiple ebtables programs were executing simultaneously. The ebtables
   userspace tool doesn't by default support multiple ebtables programs
running

Reverting the ebtables part of 1086bbe97a07 makes this work again.

Signed-off-by: Bernhard Thaler <bernhard.thaler@wvnet.at>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
9 years agoinclude/uapi/linux/virtio_balloon.h: include linux/virtio_types.h
Mikko Rapeli [Sat, 30 May 2015 15:39:25 +0000 (17:39 +0200)]
include/uapi/linux/virtio_balloon.h: include linux/virtio_types.h

Fixes userspace compilation error:

error: unknown type name ‘__virtio16’
  __virtio16 tag;

Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
9 years agoMIPS: ralink: Fix clearing the illegal access interrupt
Jonas Gorski [Mon, 25 May 2015 17:53:54 +0000 (19:53 +0200)]
MIPS: ralink: Fix clearing the illegal access interrupt

Due to a typo the illegal access interrupt is never cleared in by
the interupt handler, causing an effective deadlock on the first
illegal access.

This was broken since the code was introduced in 5433acd81e87 ("MIPS:
ralink: add illegal access driver"), but only exposed when the Kconfig
symbol was added, thus enabling the code.

Cc: <stable@vger.kernel.org> [3.18+]
Fixes: a7b7aad383c ("MIPS: ralink: add missing symbol for RALINK_ILL_ACC")
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: John Crispin <blogic@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/10172/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agodrm/i915: Don't skip request retirement if the active list is empty
Ville Syrjälä [Thu, 28 May 2015 15:32:36 +0000 (18:32 +0300)]
drm/i915: Don't skip request retirement if the active list is empty

Apparently we can have requests even if though the active list is empty,
so do the request retirement regardless of whether there's anything
on the active list.

The way it happened here is that during suspend intel_ring_idle()
notices the olr hanging around and then proceeds to get rid of it by
adding a request. However since there was nothing on the active lists
i915_gem_retire_requests() didn't clean those up, and so the idle work
never runs, and we leave the GPU "busy" during suspend resulting in a
WARN later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agodrm/i915/hsw: Fix workaround for server AUX channel clock divisor
Jim Bride [Wed, 27 May 2015 17:21:48 +0000 (10:21 -0700)]
drm/i915/hsw: Fix workaround for server AUX channel clock divisor

According to the HSW b-spec we need to try clock divisors of 63
and 72, each 3 or more times, when attempting DP AUX channel
communication on a server chipset.  This actually wasn't happening
due to a short-circuit that only checked the DP_AUX_CH_CTL_DONE bit
in status rather than checking that the operation was done and
that DP_AUX_CH_CTL_TIME_OUT_ERROR was not set.

[v2] Implemented alternate solution suggested by Jani Nikula.

Cc: stable@vger.kernel.org
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agosparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
Khalid Aziz [Wed, 27 May 2015 16:00:46 +0000 (10:00 -0600)]
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE

sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE

Bit 9 of TTE is CV (Cacheable in V-cache) on sparc v9 processor while
the same bit 9 is MCDE (Memory Corruption Detection Enable) on M7
processor. This creates a conflicting usage of the same bit. Kernel
sets TTE.cv bit on all pages for sun4v architecture which works well
for sparc v9 but enables memory corruption detection on M7 processor
which is not the intent. This patch adds code to determine if kernel
is running on M7 processor and takes steps to not enable memory
corruption detection in TTE erroneously.

Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agosparc64: pci slots information is not populated in sysfs
Eric Snowberg [Wed, 27 May 2015 15:59:19 +0000 (11:59 -0400)]
sparc64: pci slots information is not populated in sysfs

Add PCI slot numbers within sysfs for PCIe hardware.  Larger
PCIe systems with nested PCI bridges and slots further
down on these bridges were not being populated within sysfs.
This will add ACPI style PCI slot numbers for these systems
since the OF 'slot-names' information is not available on
all PCIe platforms.

Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agosparc: kernel: GRPCI2: Remove a useless memset
Christophe Jaillet [Fri, 1 May 2015 12:05:39 +0000 (14:05 +0200)]
sparc: kernel: GRPCI2: Remove a useless memset

grpci2priv is allocated using kzalloc, so there is no need to memset it.

Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: dsa: Properly propagate errors from dsa_switch_setup_one
Florian Fainelli [Fri, 29 May 2015 17:29:46 +0000 (10:29 -0700)]
net: dsa: Properly propagate errors from dsa_switch_setup_one

While shuffling some code around, dsa_switch_setup_one() was introduced,
and it was modified to return either an error code using ERR_PTR() or a
NULL pointer when running out of memory or failing to setup a switch.

This is a problem for its caler: dsa_switch_setup() which uses IS_ERR()
and expects to find an error code, not a NULL pointer, so we still try
to proceed with dsa_switch_setup() and operate on invalid memory
addresses. This can be easily reproduced by having e.g: the bcm_sf2
driver built-in, but having no such switch, such that drv->setup will
fail.

Fix this by using PTR_ERR() consistently which is both more informative
and avoids for the caller to use IS_ERR_OR_NULL().

Fixes: df197195a5248 ("net: dsa: split dsa_switch_setup into two functions")
Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp: fix child sockets to use system default congestion control if not set
Neal Cardwell [Fri, 29 May 2015 17:47:07 +0000 (13:47 -0400)]
tcp: fix child sockets to use system default congestion control if not set

Linux 3.17 and earlier are explicitly engineered so that if the app
doesn't specifically request a CC module on a listener before the SYN
arrives, then the child gets the system default CC when the connection
is established. See tcp_init_congestion_control() in 3.17 or earlier,
which says "if no choice made yet assign the current value set as
default". The change ("net: tcp: assign tcp cong_ops when tcp sk is
created") altered these semantics, so that children got their parent
listener's congestion control even if the system default had changed
after the listener was created.

This commit returns to those original semantics from 3.17 and earlier,
since they are the original semantics from 2007 in 4d4d3d1e8 ("[TCP]:
Congestion control initialization."), and some Linux congestion
control workflows depend on that.

In summary, if a listener socket specifically sets TCP_CONGESTION to
"x", or the route locks the CC module to "x", then the child gets
"x". Otherwise the child gets current system default from
net.ipv4.tcp_congestion_control. That's the behavior in 3.17 and
earlier, and this commit restores that.

Fixes: 55d8694fa82c ("net: tcp: assign tcp cong_ops when tcp sk is created")
Cc: Florian Westphal <fw@strlen.de>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Glenn Judd <glenn.judd@morganstanley.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoudp: fix behavior of wrong checksums
Eric Dumazet [Sat, 30 May 2015 16:16:53 +0000 (09:16 -0700)]
udp: fix behavior of wrong checksums

We have two problems in UDP stack related to bogus checksums :

1) We return -EAGAIN to application even if receive queue is not empty.
   This breaks applications using edge trigger epoll()

2) Under UDP flood, we can loop forever without yielding to other
   processes, potentially hanging the host, especially on non SMP.

This patch is an attempt to make things better.

We might in the future add extra support for rt applications
wanting to better control time spent doing a recv() in a hostile
environment. For example we could validate checksums before queuing
packets in socket receive queue.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoLinux 4.1-rc6
Linus Torvalds [Mon, 1 Jun 2015 02:01:07 +0000 (19:01 -0700)]
Linux 4.1-rc6

9 years agodrivers/base: cacheinfo: handle absence of caches
Sudeep Holla [Wed, 27 May 2015 10:26:13 +0000 (11:26 +0100)]
drivers/base: cacheinfo: handle absence of caches

On some simulators like GEM5, caches may not be simulated. In those
cases, the cache levels and leaves will be zero and will result in
following exception:

Unable to handle kernel NULL pointer dereference at virtual address 0040
pgd = ffffffc0008fa000
[00000040] *pgd=00000009f6807003, *pud=00000009f6807003,
   *pmd=00000009f6808003, *pte=006000002c010707
Internal error: Oops: 96000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.1.0-rc5 #198
task: ffffffc9768a0000 ti: ffffffc9768a8000 task.ti: ffffffc9768a8000
PC is at detect_cache_attributes+0x98/0x2c8
LR is at detect_cache_attributes+0x88/0x2c8

kcalloc(0) returns a special value ZERO_SIZE_PTR which is non-NULL value
but results in fault only on any attempt to dereferencing it. So
checking for the non-NULL pointer will not suffice.

This patch checks for non-zero cache leaf nodes and returns error if
there are no cache leaves in detect_cache_attributes.

Cc: <stable@vger.kernel.org> # 3.19.x
Cc: Will Deacon <will.deacon@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reported-by: William Wang <william.wang@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agosfc: free multiple Rx buffers when required
Daniel Pieczko [Fri, 29 May 2015 11:25:54 +0000 (12:25 +0100)]
sfc: free multiple Rx buffers when required

When Rx packet data must be dropped, all the buffers
associated with that Rx packet must be freed. Extend
and rename efx_free_rx_buffer() to efx_free_rx_buffers()
and loop through all the fragments.
By doing so this patch fixes a possible memory leak.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sun, 31 May 2015 23:00:34 +0000 (16:00 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs fix from Al Viro:
 "Off-by-one in d_walk()/__dentry_kill() race fix.

  It's very hard to hit; possible in the same conditions as the original
  bug, except that you need the skipped branch to contain all the
  remaining evictables, so that the d_walk()-calling loop in
  d_invalidate() decides there's nothing more to do and doesn't go for
  another pass - otherwise that next pass will sweep the sucker.

  So it's not too urgent, but seeing that the fix is obvious and the
  original commit has spread into all -stable branches..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  d_walk() might skip too much

9 years agon_tty: Fix auditing support for cannonical mode
Laura Abbott [Thu, 14 May 2015 18:42:17 +0000 (11:42 -0700)]
n_tty: Fix auditing support for cannonical mode

Commit 32f13521ca68bc624ff6effc77f308a52b038bf0
("n_tty: Line copy to user buffer in canonical mode")
changed cannonical mode copying to use copy_to_user
but missed adding the call to the audit framework.
Add in the appropriate functions to get audit support.

Fixes: 32f13521ca68 ("n_tty: Line copy to user buffer in canonical mode")
Reported-by: Miloslav Trmač <mitr@redhat.com>
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: 8250_omap: provide complete custom startup & shutdown callbacks
Sebastian Andrzej Siewior [Wed, 20 May 2015 20:07:35 +0000 (22:07 +0200)]
serial: 8250_omap: provide complete custom startup & shutdown callbacks

The currently in-use port->startup and port->shutdown are "okay". The
startup part for instance does the tiny omap extra part and invokes
serial8250_do_startup() for the remaining pieces. The workflow in
serial8250_do_startup() is okay except for the part where UART_RX is
read without a check if there is something to read. I tried to
workaround it in commit 0aa525d11859 ("tty: serial: 8250_core: read only
RX if there is something in the FIFO") but then reverted it later in
commit ca8bb4aefb9 ("serial: 8250: Revert "tty: serial: 8250_core: read
only RX if there is something in the FIFO"").

This is the second attempt to get it to work on older OMAPs without
breaking other chips this time
Peter Hurley suggested to pull in the few needed lines from
serial8250_do_startup() and drop everything else that is not required
including making it simpler like using just request_irq() instead the
chain handler like it is doing now.
So lets try that.

Fixes: ca8bb4aefb93 ("serial: 8250: Revert "tty: serial: 8250_core:
       read only RX if there is something in the FIFO"")
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoMerge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 31 May 2015 19:20:59 +0000 (12:20 -0700)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Three fixes this time around:

   - fix a memory leak which occurs when probing performance monitoring
     unit interrupts

   - fix handling of non-PMD aligned end of RAM causing boot failures

   - fix missing syscall trace exit path with syscall tracing enabled
     causing a kernel oops in the audit code"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8357/1: perf: fix memory leak when probing PMU PPIs
  ARM: fix missing syscall trace exit
  ARM: 8356/1: mm: handle non-pmd-aligned end of RAM

9 years agoMerge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/ralf/linux
Linus Torvalds [Sun, 31 May 2015 19:03:42 +0000 (12:03 -0700)]
Merge branch 'upstream' of git://git./linux/kernel/git/ralf/linux

Pull MIPS fixes from Ralf Baechle:
 "MIPS fixes for 4.1 all across the tree"

* 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/ralf/linux:
  MIPS: strnlen_user.S: Fix a CPU_DADDI_WORKAROUNDS regression
  MIPS: BMIPS: Fix bmips_wr_vec()
  MIPS: ath79: fix build problem if CONFIG_BLK_DEV_INITRD is not set
  MIPS: Fuloong 2E: Replace CONFIG_USB_ISP1760_HCD by CONFIG_USB_ISP1760
  MIPS: irq: Use DECLARE_BITMAP
  ttyFDC: Fix to use native endian MMIO reads
  MIPS: Fix CDMM to use native endian MMIO reads

9 years agoMerge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Linus Torvalds [Sun, 31 May 2015 18:39:25 +0000 (11:39 -0700)]
Merge branch 'turbostat' of git://git./linux/kernel/git/lenb/linux

Pull turbostat tool fixes from Len Brown:
 "Just one minor kernel dependency in this batch -- added a #define to
  msr-index.h"

* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: update version number to 4.7
  tools/power turbostat: allow running without cpu0
  tools/power turbostat: correctly decode of ENERGY_PERFORMANCE_BIAS
  tools/power turbostat: enable turbostat to support Knights Landing (KNL)
  tools/power turbostat: correctly display more than 2 threads/core