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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fix from Stephen Boyd:
"One small fix to keep OMAP platforms working across a suspend/resume
cycle"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: ti: omap3+: dpll: use non-locking version of clk_get_rate
Pull Ceph fixes from Sage Weil:
"There are two small messenger bug fixes and a log spam regression fix"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
libceph: don't spam dmesg with stray reply warnings
libceph: use the right footer size when skipping a message
libceph: don't bail early from try_read() when skipping a message
Things got calmed down for rc6, as it seems, and we have only a few
HD-audio fixes at this time: a fix for Skylake codec probe errors,
a fix for missing interrupt handling, and a few Dell and HP quirks.
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Merge tag 'sound-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Things got calmed down for rc6, as it seems, and we have only a few
HD-audio fixes at this time: a fix for Skylake codec probe errors, a
fix for missing interrupt handling, and a few Dell and HP quirks"
* tag 'sound-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Loop interrupt handling until really cleared
ALSA: hda - Fix headset support and noise on HP EliteBook 755 G2
ALSA: hda - Fixup speaker pass-through control for nid 0x14 on ALC225
ALSA: hda - Fixing background noise on Dell Inspiron 3162
ALSA: hda - Apply clock gate workaround to Skylake, too
- Revert an ACPI core change related to IRQ management in PCI
that introduced code relying on the use of kmalloc() which
turned out to also run during early init when that's not
available yet and caused some systems to crash on boot for
this reason along with a cleanup on top of it (Rafael Wysocki).
- Prevent devfreq from flooding the kernel log with useless
messages on Tegra (which started to happen after some recent
changes in the devfreq core) by fixing the driver to follow
the documentation and the core's expectations in its ->target
callback (Tomeu Vizoso).
/
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Merge tag 'pm+acpi-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are two reverts of recent PCI-related ACPI core changes (one of
which caused some systems to crash on boot and the other was a cleanup
on top of it) and a devfreq fix for Tegra.
Specifics:
- Revert an ACPI core change related to IRQ management in PCI that
introduced code relying on the use of kmalloc() which turned out to
also run during early init when that's not available yet and caused
some systems to crash on boot for this reason along with a cleanup
on top of it (Rafael Wysocki).
- Prevent devfreq from flooding the kernel log with useless messages
on Tegra (which started to happen after some recent changes in the
devfreq core) by fixing the driver to follow the documentation and
the core's expectations in its ->target callback (Tomeu Vizoso)"
* tag 'pm+acpi-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPI, PCI, irq: remove interrupt count restriction"
Revert "ACPI / PCI: Simplify acpi_penalize_isa_irq()"
PM / devfreq: tegra: Set freq in rate callback
Currently the interrupt handler of HD-audio driver assumes that no irq
update is needed while processing the irq. But in reality, it has
been confirmed that the HW irq is issued even during the irq
handling. Since we clear the irq status at the beginning, process the
interrupt, then exits from the handler, the lately issued interrupt is
left untouched without being properly processed.
This patch changes the interrupt handler code to loop over the
check-and-process. The handler tries repeatedly as long as the IRQ
status are turned on, and either stream or CORB/RIRB is handled.
For checking the stream handling, snd_hdac_bus_handle_stream_irq()
returns a value indicating the stream indices bits. Other than that,
the change is only in the irq handler itself.
Reported-by: Libin Yang <libin.yang@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
When perf added a "reg" function to the function tracing event (not a
tracepoint), it caused that event to be displayed as a tracepoint and
could cause errors in tracepoint handling. That was solved by adding a
flag to ignore ftrace non-tracepoint events. But that flag was missed
when displaying events in available_events, which should only contain
tracepoint events.
This broke a documented way to enable all events with:
cat available_events > set_event
As the function non-tracepoint event would cause that to error out.
The commit here fixes that by having the available_events file not list
events that have the ignore flag set.
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Merge tag 'trace-fixes-v4.5-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt:
"Another small bug reported to me by Chunyu Hu.
When perf added a "reg" function to the function tracing event (not a
tracepoint), it caused that event to be displayed as a tracepoint and
could cause errors in tracepoint handling. That was solved by adding
a flag to ignore ftrace non-tracepoint events. But that flag was
missed when displaying events in available_events, which should only
contain tracepoint events.
This broke a documented way to enable all events with:
cat available_events > set_event
As the function non-tracepoint event would cause that to error out.
The commit here fixes that by having the available_events file not
list events that have the ignore flag set"
* tag 'trace-fixes-v4.5-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix showing function event in available_events
- Fix per-vcpu vgic bitmap allocation
- Do not give copy random memory on MMIO read
- Fix GICv3 APR register restore order
KVM/x86 fixes:
- Fix ubsan warning
- Fix hardware breakpoints in a guest vs. preempt notifiers
- Fix Hurd
Generic:
- use __GFP_NOWARN together with GFP_NOWAIT
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"KVM/ARM fixes:
- Fix per-vcpu vgic bitmap allocation
- Do not give copy random memory on MMIO read
- Fix GICv3 APR register restore order
KVM/x86 fixes:
- Fix ubsan warning
- Fix hardware breakpoints in a guest vs. preempt notifiers
- Fix Hurd
Generic:
- use __GFP_NOWARN together with GFP_NOWAIT"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: MMU: fix ubsan index-out-of-range warning
arm64: KVM: vgic-v3: Restore ICH_APR0Rn_EL2 before ICH_APR1Rn_EL2
KVM: async_pf: do not warn on page allocation failures
KVM: x86: fix conversion of addresses to linear in 32-bit protected mode
KVM: x86: fix missed hardware breakpoints
arm/arm64: KVM: Feed initialized memory to MMIO accesses
KVM: arm/arm64: vgic: Ensure bitmaps are long enough
Pull s390 bugfixes from Martin Schwidefsky:
"Two critical bug fixes for the signal handling"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/fpu: signals vs. floating point control register
s390/compat: correct restore of high gprs on signal return
in case of unusually long writes to some system interfaces used by
mountd and other nfs support utilities.
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Merge tag 'nfsd-4.5-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfix from Bruce Fields:
"One fix for a bug that could cause a NULL write past the end of a
buffer in case of unusually long writes to some system interfaces used
by mountd and other nfs support utilities"
* tag 'nfsd-4.5-1' of git://linux-nfs.org/~bfields/linux:
sunrpc/cache: fix off-by-one in qword_get()
Pull drm fixes from Dave Airlie:
"This is a bit larger than Id like, but I asked the Intel guys to pull
in some Skylake fixes in the possibly vain hope that Skylake might be
more functional now that I'm seeing production hardware shipping.
For i915, it's mostly the same patch in a few places, making sure the
hw doesn't turn off when we are programming it.
Apart from that are two nouveau fixes, one for a module defer bug, and
one for using nouveau on new Lenovo P50 models.
Then there are a bunch of AMDGPU fixes, one is a fix for v4.4 vblank
regressions, and some PM fixes"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (26 commits)
drm/nouveau/disp/dp: ensure sink is powered up before attempting link training
drm/nouveau: platform: Fix deferred probe
drm/amdgpu: disable direct VM updates when vm_debug is set
amdgpu: fix NULL pointer dereference at tonga_check_states_equal
drm/i915/gen9: Verify and enforce dc6 state writes
drm/i915/gen9: Check for DC state mismatch
drm/radeon/pm: adjust display configuration after powerstate
drm/amdgpu/pm: adjust display configuration after powerstate
drm/amdgpu/pm: add some checks for PX
drm/amdgpu: fix locking in force performance level
drm/amdgpu/gfx8: fix priv reg interrupt enable
drm/i915/skl: Ensure HW is powered during DDB HW state readout
drm/i915/lvds: Ensure the HW is powered during HW state readout
drm/i915/hdmi: Ensure the HW is powered during HW state readout
drm/i915/dsi: Ensure the HW is powered during HW state readout
drm/i915/dp: Ensure the HW is powered during HW state readout
drm/i915: Ensure the HW is powered when accessing the CRC HW block
drm/i915/ddi: Ensure the HW is powered during HW state readout
drm/i915/crt: Ensure the HW is powered during HW state readout
drm/i915: Ensure the HW is powered during HW access in assert_pipe
...
Pull libnvdimm fixes from Dan Williams:
- Two fixes for compatibility with the ACPI 6.1 specification.
Without these fixes multi-interface DIMMs will fail to be probed, and
address range scrub commands to find memory errors will give results
that the kernel will mis-interpret. For multi-interface DIMMs Linux
will accept either the original 6.0 implementation or 6.1.
For address range scrub we'll only support 6.1 since ACPI formalized
this DSM differently than the original example [1] implemented in
v4.2. The expectation is that production systems will only ever ship
the ACPI 6.1 address range scrub command definition.
- The wider async address range scrub work targeting 4.6 discovered
that the original synchronous implementation in 4.5 is not sizing its
return buffer correctly.
- Arnd caught that my recent fix to the size of the pfn_t flags missed
updating the flags variable used in the pmem driver.
- Toshi found that we mishandle the memremap() return value in
devm_memremap().
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
nvdimm: use 'u64' for pfn flags
devm_memremap: Fix error value when memremap failed
nfit: update address range scrub commands to the acpi 6.1 format
libnvdimm, tools/testing/nvdimm: fix 'ars_status' output buffer sizing
nfit: fix multi-interface dimm handling, acpi6.1 compatibility
Add a regression fix for changed sysfs path of
bq27xxx_battery and update MAINTAINERS file.
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Merge tag 'for-v4.5-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply fixes from Sebastian Reichel:
"Add a regression fix for changed sysfs path of bq27xxx_battery and
update MAINTAINERS file"
* tag 'for-v4.5-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
power: bq27xxx_battery: Restore device name
MAINTAINERS: update bq27xxx driver
HP EliteBook 755 G2 with ALC3228 (ALC280) codec [103c:221c] requires
the known fixup (ALC269_FIXUP_HEADSET_MIC) for making the headset mic
working. Also, it suffers from the loopback noise problem, so we
should disable aamix path as well.
Reported-by: Derick Eddington <derick.eddington@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
On one of the machines we enable, we found that the actual speaker volume
did not always correspond to the volume set in alsamixer. This patch
fixes that problem.
This patch was orginally written by Kailang @ Realtek, I've rebased it
to fit sound git master.
Cc: stable@vger.kernel.org
BugLink: https://bugs.launchpad.net/bugs/1549660
Co-Authored-By: Kailang <kailang@realtek.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
- Fix per-vcpu vgic bitmap allocation
- Do not give copy random memory on MMIO read
- Fix GICv3 APR register restore order
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Merge tag 'kvm-arm-for-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/ARM fixes for 4.5-rc6
- Fix per-vcpu vgic bitmap allocation
- Do not give copy random memory on MMIO read
- Fix GICv3 APR register restore order
After login to the desktop on Dell Inspiron 3162,
there's a very loud background noise comes from the builtin speaker.
The noise does not go away even if the speaker is muted.
The noise disappears after using the aamix fixup.
Codec: Realtek ALC3234
Address: 0
AFG Function Id: 0x1 (unsol 1)
Vendor Id: 0x10ec0255
Subsystem Id: 0x10280725
Revision Id: 0x100002
No Modem Function Group found
BugLink: http://bugs.launchpad.net/bugs/1549620
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
single for for eDP panel issues on Lenovo P50
* 'linux-4.5' of git://github.com/skeggsb/linux:
drm/nouveau/disp/dp: ensure sink is powered up before attempting link training
This can happen under some annoying circumstances, and is a quick fix
until more substantial changes can be made.
Fixed eDP mode changes on (at least) the Lenovo P50.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
CONFIG_ARCH_SHMOBILE is not only enabled for Renesas ARM platforms
(which are DT based and multi-platform), but also on a select set of
Renesas SuperH platforms (SH7722/SH7723/SH7724/SH7343/SH7366). Hence
since commit 0ba58de231 ("drivers: sh: Get rid of
CONFIG_ARCH_SHMOBILE_MULTI"), the legacy clock domain is no longer
installed on these SuperH platforms, and module clocks may not be
enabled when needed, leading to driver failures.
To fix this, add an additional check for CONFIG_OF.
Fixes: 0ba58de231 ("drivers: sh: Get rid of CONFIG_ARCH_SHMOBILE_MULTI").
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This is a bit large, but it really helps Skylake bugs we are seeing
on a number of laptops.
Most of the commits are quite similar, ensuring the display power
doesn't vanish under us during hardware access. Also do note that it's
not just Skylake that's affected.
* tag 'drm-intel-fixes-2016-02-22' of git://anongit.freedesktop.org/drm-intel:
drm/i915/gen9: Verify and enforce dc6 state writes
drm/i915/gen9: Check for DC state mismatch
drm/i915/skl: Ensure HW is powered during DDB HW state readout
drm/i915/lvds: Ensure the HW is powered during HW state readout
drm/i915/hdmi: Ensure the HW is powered during HW state readout
drm/i915/dsi: Ensure the HW is powered during HW state readout
drm/i915/dp: Ensure the HW is powered during HW state readout
drm/i915: Ensure the HW is powered when accessing the CRC HW block
drm/i915/ddi: Ensure the HW is powered during HW state readout
drm/i915/crt: Ensure the HW is powered during HW state readout
drm/i915: Ensure the HW is powered during HW access in assert_pipe
drm/i915: Ensure the HW is powered when disabling VGA
drm/i915/ibx: Ensure the HW is powered during PLL HW readout
drm/i915: Ensure the HW is powered during display pipe HW readout
drm/i915: Add helper to get a display power ref if it was already enabled
A few radeon and amdgpu fixes for 4.5. A few further fixes for the vblank
regressions in 4.4 and a couple of other minor fixes.
* 'drm-fixes-4.5' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: disable direct VM updates when vm_debug is set
amdgpu: fix NULL pointer dereference at tonga_check_states_equal
drm/radeon/pm: adjust display configuration after powerstate
drm/amdgpu/pm: adjust display configuration after powerstate
drm/amdgpu/pm: add some checks for PX
drm/amdgpu: fix locking in force performance level
drm/amdgpu/gfx8: fix priv reg interrupt enable
drm/amdgpu: Don't hang in amdgpu_flip_work_func on disabled crtc.
drm/radeon: Don't hang in radeon_flip_work_func on disabled crtc. (v2)
- Fix for csd deadlock due to missing self IPI
- Accompanying IPI cleanups / optimization
- Brown paper bag bug in one of the cleanups above
- Boot reporting updates for new hardware features
- Don't force DEVTMPFS if INITRAMFS
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Merge tag 'arc-4.5-rc6-fixes-upd' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
- Fix for csd deadlock due to missing self IPI
- Accompanying IPI cleanups / optimization
- Brown paper bag bug in one of the cleanups above
- Boot reporting updates for new hardware features
- Don't force DEVTMPFS if INITRAMFS
* tag 'arc-4.5-rc6-fixes-upd' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
arc: SMP: CONFIG_ARC_IPI_DBG cleanup
ARC: SMP: No need for CONFIG_ARC_IPI_DBG
ARCv2: Elide sending new cross core intr if receiver didn't ack prev
ARCv2: SMP: Push IPI_IRQ into IPI provider
ARC: [intc-compact] Remove IPI setup from ARCompact port
ARCv2: SMP: Emulate IPI to self using software triggered interrupt
arc: get rid of DEVTMPFS dependency on INITRAMFS_SOURCE
ARCv2: boot report CCMs (Closely Coupled Memories)
ARCv2: boot print Low Latency Memory
ARC: Assume multiplier is always present
Pull vfs fixes from Al Viro:
"Assorted fixes - xattr one from this cycle, the rest - stable fodder"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs/pnode.c: treat zero mnt_group_id-s as unequal
affs_do_readpage_ofs(): just use kmap_atomic() around memcpy()
xattr handlers: plug a lock leak in simple_xattr_list
fs: allow no_seek_end_llseek to actually seek
Commit d15f9d694b ("libceph: check data_len in ->alloc_msg()")
mistakenly bumped the log level on the "tid %llu unknown, skipping"
message. Turn it back into a dout() - stray replies are perfectly
normal when OSDs flap, crash, get killed for testing purposes, etc.
Cc: stable@vger.kernel.org # 4.3+
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
ceph_msg_footer is 21 bytes long, while ceph_msg_footer_old is only 13.
Don't skip too much when CEPH_FEATURE_MSG_AUTH isn't negotiated.
Cc: stable@vger.kernel.org # 3.19+
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
The contract between try_read() and try_write() is that when called
each processes as much data as possible. When instructed by osd_client
to skip a message, try_read() is violating this contract by returning
after receiving and discarding a single message instead of checking for
more. try_write() then gets a chance to write out more requests,
generating more replies/skips for try_read() to handle, forcing the
messenger into a starvation loop.
Cc: stable@vger.kernel.org # 3.10+
Reported-by: Varada Kari <Varada.Kari@sandisk.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Tested-by: Varada Kari <Varada.Kari@sandisk.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Sebastian Ott and Gerald Schaefer reported random crashes on s390.
It was bisected to my THP refcounting patchset.
The problem is that pmdp_invalidated() called with wrong virtual
address. It got offset up by HPAGE_PMD_SIZE by loop over ptes.
The solution is to introduce new variable to be used in loop and don't
touch 'haddr'.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-and-tested-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reported-and-tested-by Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
That should make user space bugs more obvious.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
The event_data passed from pem_fini was not cleared upon initialization.
This caused NULL checks to pass and cast_const_phw_tonga_power_state to
attempt to dereference an invalid pointer. Clear the event_data in
pem_init and pem_fini before calling pem_handle_event.
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Bradley Pankow <btpankow@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
The GICv3 architecture spec says:
Writing to the active priority registers in any order other than
the following order will result in UNPREDICTABLE behavior:
- ICH_AP0R<n>_EL2.
- ICH_AP1R<n>_EL2.
So let's not pointlessly go against the rule...
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
The ftrace:function event is only displayed for parsing the function tracer
data. It is not used to enable function tracing, and does not include an
"enable" file in its event directory.
Originally, this event was kept separate from other events because it did
not have a ->reg parameter. But perf added a "reg" parameter for its use
which caused issues, because it made the event available to functions where
it was not compatible for.
Commit 9b63776fa3 "tracing: Do not enable function event with enable"
added a TRACE_EVENT_FL_IGNORE_ENABLE flag that prevented the function event
from being enabled by normal trace events. But this commit missed keeping
the function event from being displayed by the "available_events" directory,
which is used to show what events can be enabled by set_event.
One documented way to enable all events is to:
cat available_events > set_event
But because the function event is displayed in the available_events, this
now causes an INVALID error:
cat: write error: Invalid argument
Reported-by: Chunyu Hu <chuhu@redhat.com>
Fixes: 9b63776fa3 "tracing: Do not enable function event with enable"
Cc: stable@vger.kernel.org # 3.4+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Commit e8dd2d2d64 ("Silence compiler warning in arch/x86/kvm/emulate.c",
2015-09-06) broke boot of the Hurd. The bug is that the "default:"
case actually could modify "la", but after the patch this change is
not reflected in *linear.
The bug is visible whenever a non-zero segment base causes the linear
address to wrap around the 4GB mark.
Fixes: e8dd2d2d64
Cc: stable@vger.kernel.org
Reported-by: Aurelien Jarno <aurelien@aurel32.net>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Revert commit b5bd026954 (ACPI, PCI, irq: remove interrupt count
restriction) that introduced a boot regression on some systems
where it caused kmalloc() to be used too early.
Link: http://marc.info/?l=linux-acpi&m=145580159209240&w=2
Reported-by: Nalla, Ravikanth <ravikanth.nalla@hpe.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Revert commit 0971686954 "ACPI / PCI: Simplify acpi_penalize_isa_irq()"
that depends on commit b5bd026954 (ACPI, PCI, irq: remove interrupt
count restriction) which introduced a regression and needs to be
reverted for this reason.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
On an MMIO access, we always copy the on-stack buffer info
the shared "run" structure, even if this is a read access.
This ends up leaking up to 8 bytes of uninitialized memory
into userspace, depending on the size of the access.
An obvious fix for this one is to only perform the copy if
this is an actual write.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Previous Commit ("ARC: SMP: No need for CONFIG_ARC_IPI_DBG") removed
the Kconfig option ARC_IPI_DBG. Remove the last reference on this
option.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARConnect/MCIP IPI sending has a retry-wait loop in case caller had
not seen a previous such interrupt. Turns out that it is not needed at
all. Linux cross core calling allows coalescing multiple IPIs to same
receiver - it is fine as long as there is one.
This logic is built into upper layer already, at a higher level of
abstraction. ipi_send_msg_one() sets the actual msg payload, but it only
calls MCIP IPI sending if msg holder was empty (using
atomic-set-new-and-get-old construct). Thus it is unlikely that the
retry-wait looping was ever getting exercised at all.
Cc: Chuck Jordan <cjordan@synopsys.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
There is no real ARC700 based SMP SoC so remove IPI definition.
EZChip's SMP ARC700 is going to use a different intc and IPI provider
anyways.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARConnect/MCIP Inter-Core-Interrupt module can't send interrupt to
local core. So use core intc capability to trigger software
interrupt to self, using an unsued IRQ #21.
This showed up as csd deadlock with LTP trace_sched on a dual core
system. This test acts as scheduler fuzzer, triggering all sorts of
schedulting activity. Trouble starts with IPI to self, which doesn't get
delivered (effectively lost due to H/w capability), but the msg intended
to be sent remain enqueued in per-cpu @ipi_data.
All subsequent IPIs to this core from other cores get elided due to the
IPI coalescing optimization in ipi_send_msg_one() where a pending msg
implies an IPI already sent and assumes other core is yet to ack it.
After the elided IPI, other core simply goes into csd_lock_wait()
but never comes out as this core never sees the interrupt.
Fixes STAR 9001008624
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org> [4.2]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
multipath is handling faults due to path failures. This leak does not
happen if blk-mq DM multipath is used. It only occurs if .request_fn DM
multipath is stacked ontop of blk-mq paths (e.g. scsi-mq devices).
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Merge tag 'dm-4.5-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fix from Mike Snitzer:
"Fix a 112 byte leak for each IO request that is requeued while DM
multipath is handling faults due to path failures.
This leak does not happen if blk-mq DM multipath is used. It only
occurs if .request_fn DM multipath is stacked ontop of blk-mq paths
(e.g. scsi-mq devices)"
* tag 'dm-4.5-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm: fix dm_rq_target_io leak on faults with .request_fn DM w/ blk-mq paths
