percpu_ref internally uses sched-RCU to implement the percpu -> atomic
mode switching and the documentation suggested that this could be
depended upon. This doesn't seem like a good idea.
* percpu_ref uses sched-RCU which has different grace periods regular
RCU. Users may combine percpu_ref with regular RCU usage and
incorrectly believe that regular RCU grace periods are performed by
percpu_ref. This can lead to, for example, use-after-free due to
premature freeing.
* percpu_ref has a grace period when switching from percpu to atomic
mode. It doesn't have one between the last put and release. This
distinction is subtle and can lead to surprising bugs.
* percpu_ref allows starting in and switching to atomic mode manually
for debugging and other purposes. This means that there may not be
any grace periods from kill to release.
This patch makes it clear that the grace periods are percpu_ref's
internal implementation detail and can't be depended upon by the
users.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
In case of memory deficit and low percpu memory pages,
pcpu_balance_workfn() takes pcpu_alloc_mutex for a long
time (as it makes memory allocations itself and waits
for memory reclaim). If tasks doing pcpu_alloc() are
choosen by OOM killer, they can't exit, because they
are waiting for the mutex.
The patch makes pcpu_alloc() to care about killing signal
and use mutex_lock_killable(), when it's allowed by GFP
flags. This guarantees, a task does not miss SIGKILL
from OOM killer.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
microblaze build broke due to missing declaration of the
cond_resched() invocation added recently. Let's include linux/sched.h
explicitly.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
CM_PLLx and A2W_XOSC_CTRL registers are accessed by different clock
handlers and must be accessed with ->regs_lock held.
Update the sections where this protection is missing.
Fixes: 41691b8862 ("clk: bcm2835: Add support for programming the audio domain clocks")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
ana->maskX values are already '~'-ed in bcm2835_pll_set_rate(). Remove
the '~' in the definition to fix ANA setup.
Note that this commit fixes a long standing bug preventing one from
using an HDMI display if it's plugged after the FW has booted Linux.
This is because PLLH is used by the HDMI encoder to generate the pixel
clock.
Fixes: 41691b8862 ("clk: bcm2835: Add support for programming the audio domain clocks")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This patch fixes static checker warning caused by
"36cc549d5986: "drm/amd/display: disable CRTCs with
NULL FB on their primary plane (V2)"
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
bad case won't follow normal sense, it will not enable vga1 as usual, but vga2,3,4 is on.
Signed-off-by: Clark Zheng <clark.zheng@amd.com>
Reviewed-by: Tony Cheng <tony.cheng@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Currently, the offsets in the UAC2 processing unit descriptor are
calculated incorrectly. It causes an issue when connecting the device which
provides such a feature:
~~~~
[84126.724420] usb 1-1.3.1: invalid Processing Unit descriptor (id 18)
~~~~
After this patch is applied, the UAC2 processing unit inits w/o this error.
Fixes: 23caaf19b1 ("ALSA: usb-mixer: Add support for Audio Class v2.0")
Signed-off-by: Kirill Marinushkin <k.marinushkin@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
When commit 9c7be59fc5 ("libata: Apply NOLPM quirk to Crucial MX100
512GB SSDs") was added it inherited the ATA_HORKAGE_NO_NCQ_TRIM quirk
from the existing "Crucial_CT*MX100*" entry, but that entry sets model_rev
to "MU01", where as the entry adding the NOLPM quirk sets it to NULL.
This means that after this commit we no apply the NO_NCQ_TRIM quirk to
all "Crucial_CT512MX100*" SSDs even if they have the fixed "MU02"
firmware. This commit splits the "Crucial_CT512MX100*" quirk into 2
quirks, one for the "MU01" firmware and one for all other firmware
versions, so that we once again only apply the NO_NCQ_TRIM quirk to the
"MU01" firmware version.
Fixes: 9c7be59fc5 ("libata: Apply NOLPM quirk to ... MX100 512GB SSDs")
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Commit b17e5729a6 ("libata: disable LPM for Crucial BX100 SSD 500GB
drive"), introduced a ATA_HORKAGE_NOLPM quirk for Crucial BX100 500GB SSDs
but limited this to the MU02 firmware version, according to:
http://www.crucial.com/usa/en/support-ssd-firmware
MU02 is the last version, so there are no newer possibly fixed versions
and if the MU02 version has broken LPM then the MU01 almost certainly
also has broken LPM, so this commit changes the quirk to apply to all
firmware versions.
Fixes: b17e5729a6 ("libata: disable LPM for Crucial BX100 SSD 500GB...")
Cc: stable@vger.kernel.org
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
There have been reports of the Crucial M500 480GB model not working
with LPM set to min_power / med_power_with_dipm level.
It has not been tested with medium_power, but that typically has no
measurable power-savings.
Note the reporters Crucial_CT480M500SSD3 has a firmware version of MU03
and there is a MU05 update available, but that update does not mention any
LPM fixes in its changelog, so the quirk matches all firmware versions.
In my experience the LPM problems with (older) Crucial SSDs seem to be
limited to higher capacity versions of the SSDs (different firmware?),
so this commit adds a NOLPM quirk for the 480 and 960GB versions of the
M500, to avoid LPM causing issues with these SSDs.
Cc: stable@vger.kernel.org
Reported-and-tested-by: Martin Steigerwald <martin@lichtvoll.de>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
If the server is malicious then *bytes_read could be larger than the
size of the "target" buffer. It would lead to memory corruption when we
do the memcpy().
Reported-by: Dr Silvio Cesare of InfoSect <Silvio Cesare <silvio.cesare@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A slightly fiddly revert then fix pair in here as the bug lead to
an unused local variable that was then removed without us noticing
the bug. The revert should only be needed on 4.16 - the fix
goes back futher.
* ccs811
- Fix the transition from 'boot' to 'application' mode. Fixes the case
where the power is not cut between boot cycles.
* meson-saradc
- Fix missing mutex_unlock in an error path.
* sd-modulator
- Fix bindings doc to have the right value of io-channel-cells to reflect
that this device type only ever outputs one channel.
* st-accel
- Revert drop of redundant pointer patch.
- Use the now available pointer to avoid overwriting the platform data
pointer and causing trouble on reprobing the driver.
* st-pressure
- Use local copy of the platform data pointer to avoid overwriting the
one associated with the device, which would cause issues on reprobing
the driver.
* stm32-dfsdm
- Use the right regmap_cfg for the type of device.
- Correct the ID passed to stop channel to be the channel one.
- Correct which clock is used to allow for the 'audio' clock.
- Fix allocation of channels when more than one is enabled.
-----BEGIN PGP SIGNATURE-----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=n3mX
-----END PGP SIGNATURE-----
Merge tag 'iio-fixes-for-4.16b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus
Jonathan writes:
Second set of IIO fixes for the 4.16 cycle.
A slightly fiddly revert then fix pair in here as the bug lead to
an unused local variable that was then removed without us noticing
the bug. The revert should only be needed on 4.16 - the fix
goes back futher.
* ccs811
- Fix the transition from 'boot' to 'application' mode. Fixes the case
where the power is not cut between boot cycles.
* meson-saradc
- Fix missing mutex_unlock in an error path.
* sd-modulator
- Fix bindings doc to have the right value of io-channel-cells to reflect
that this device type only ever outputs one channel.
* st-accel
- Revert drop of redundant pointer patch.
- Use the now available pointer to avoid overwriting the platform data
pointer and causing trouble on reprobing the driver.
* st-pressure
- Use local copy of the platform data pointer to avoid overwriting the
one associated with the device, which would cause issues on reprobing
the driver.
* stm32-dfsdm
- Use the right regmap_cfg for the type of device.
- Correct the ID passed to stop channel to be the channel one.
- Correct which clock is used to allow for the 'audio' clock.
- Fix allocation of channels when more than one is enabled.
This fixes use after free introduced by the last cc770 patch.
Signed-off-by: Andri Yngvason <andri.yngvason@marel.com>
Fixes: 746201235b ("can: cc770: Fix queue stall & dropped RTR reply")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Section was not properly computed. The value of OOB region definition is
always ECC section 0 information in the OOB area, but we want to get all
the ECC bytes information, so we should call
mtd_ooblayout_ecc(mtd, section++, &oobregion) until it returns -ERANGE.
Fixes: c2b78452a9 ("mtd: use mtd_ooblayout_xxx() helpers where appropriate")
Cc: <stable@vger.kernel.org>
Signed-off-by: OuYang ZhiZhong <ouyzz@yealink.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Revert commit c68f0676ef ("ACPI / battery: Add quirk for Asus
GL502VSK and UX305LA") and commit 4446823e25 ("ACPI / battery: Add
quirk for Asus UX360UA and UX410UAK").
On many many Asus products, the battery is sometimes reported as
charging or discharging even when it is full and you are on AC power.
This change quirked the kernel to avoid advertising the discharging
state when this happens on 4 laptop models, under the belief that
this was incorrect information. I presume it originates from user
reports who are confused that their battery status icon says that it
is discharging.
However, the reported information is indeed correct, and the quirk
approach taken is inadequate and more thought is needed first.
Specifically:
1. It only quirks discharging state, not charging
2. There are so many different Asus products and DMI naming variants
within those product families that behave this way; Linux could
grow to quirk hundreds of products and still not even be close at
"winning" this battle.
3. Asus previously clarified that this behaviour is intentional. The
platform will periodically do a partial discharge/charge cycle
when the battery is full, because this is one way to extend the
lifetime of the battery (leaving a battery at 100% charge and
unused will decrease its usable capacity over time).
My understanding is that any decent consumer product will have
this behaviour, but it appears that Asus is different in that
they expose this info through ACPI.
However, the behaviour seems correct. The ACPI spec does not
suggest in that the platform should hide the truth. It lets you
report that the battery is full of charge, and discharging, and
with external power connected; and Asus does this.
4. In terms of not confusing the user, this seems like something that
could/should be handled by userspace, which can also detect these
same (accurate) conditions in the general case.
Revert this quirk before it gets included in a release, while we look
for better approaches.
Signed-off-by: Daniel Drake <drake@endlessm.com>
Acked-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Since commit 846c7dfc11 ("drm/atomic: Try to preserve the crtc enabled
state in drm_atomic_remove_fb, v2."), removing the last framebuffer will
no longer disable the corresponding pipeline, which causes the KMS core
to complain about leaked connectors on driver unbind.
Fix this by calling drm_atomic_helper_shutdown() on driver unbind, which
will cause all display pipelines to be shut down and therefore drop the
extra references on the connectors.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The regulator is controlled as part of runtime PM, so it should not be
additionally disabled from the ->exit() callback.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Detaching from an IOMMU group multiple times can lead to a crash. This
could potentially be fixed in the IOMMU driver, but it's easy to avoid
the subsequent detach operations in this driver, so do that as well.
Signed-off-by: Thierry Reding <treding@nvidia.com>
glibc keeps getting cleverer, and my version now turns raise() into
more than one syscall. Since the test relies on ptrace seeing an
exact set of syscalls, this breaks the test. Replace raise(SIGSTOP)
with syscall(SYS_tgkill, ...) to force glibc to get out of our way.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kselftest@vger.kernel.org
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/bc80338b453afa187bc5f895bd8e2c8d6e264da2.1521300271.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The #sound-dai-cells DT property is required to describe link between
the HDMI IP block and the SoC's audio subsystem.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
When unbinding/removing the driver, we will run into the following warnings:
[ 259.655198] fec 400d1000.ethernet: 400d1000.ethernet supply phy not found, using dummy regulator
[ 259.665065] fec 400d1000.ethernet: Unbalanced pm_runtime_enable!
[ 259.672770] fec 400d1000.ethernet (unnamed net_device) (uninitialized): Invalid MAC address: 00:00:00:00:00:00
[ 259.683062] fec 400d1000.ethernet (unnamed net_device) (uninitialized): Using random MAC address: f2:3e:93:b7:29:c1
[ 259.696239] libphy: fec_enet_mii_bus: probed
Avoid these warnings by balancing the runtime PM calls during fec_drv_remove().
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull x86/pti updates from Thomas Gleixner:
"Another set of melted spectrum updates:
- Iron out the last late microcode loading issues by actually
checking whether new microcode is present and preventing the CPU
synchronization to run into a timeout induced hang.
- Remove Skylake C2 from the microcode blacklist according to the
latest Intel documentation
- Fix the VM86 POPF emulation which traps if VIP is set, but VIF is
not. Enhance the selftests to catch that kind of issue
- Annotate indirect calls/jumps for objtool on 32bit. This is not a
functional issue, but for consistency sake its the right thing to
do.
- Fix a jump label build warning observed on SPARC64 which uses 32bit
storage for the code location which is casted to 64 bit pointer w/o
extending it to 64bit first.
- Add two new cpufeature bits. Not really an urgent issue, but
provides them for both x86 and x86/kvm work. No impact on the
current kernel"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode: Fix CPU synchronization routine
x86/microcode: Attempt late loading only when new microcode is present
x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist
jump_label: Fix sparc64 warning
x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32-bit kernels
x86/vm86/32: Fix POPF emulation
selftests/x86/entry_from_vm86: Add test cases for POPF
selftests/x86/entry_from_vm86: Exit with 1 if we fail
x86/cpufeatures: Add Intel PCONFIG cpufeature
x86/cpufeatures: Add Intel Total Memory Encryption cpufeature
Pull x86 fix from Thomas Gleixner:
"A single fix for vmalloc_fault() which uses p*d_huge() unconditionally
whether CONFIG_HUGETLBFS is set or not. In case of CONFIG_HUGETLBFS=n
this results in a crash as p*d_huge() returns 0 in that case"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Fix vmalloc_fault to use pXd_large
Pull irq fixes from Thomas Gleixner:
"Three fixes for irq chip drivers:
- Make sure the allocations in the GIC-V3 ITS driver are large enough
to accomodate the interrupt space
- Fix a misplaced __iomem annotation which causes a splat of 26
sparse warnings
- Remove an unused function in the IMX GPCV2 driver which causes
build warnings"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/irq-imx-gpcv2: Remove unused function
irqchip/gic-v3-its: Ensure nr_ites >= nr_lpis
irqchip/gic-v3-its: Fix misplaced __iomem annotations
Pull EFI fix from Thomas Gleixner:
"A single fix to prevent partially initialized pointers in mixed mode
(64bit kernel on 32bit UEFI)"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/libstub/tpm: Initialize pointer variables to zero for mixed mode
lockups on POWER9.
* ARM: locking fix, reset fix, GICv2 multi-source SGI injection fix,
GICv2-on-v3 MMIO synchronization fix, make the console less verbose.
* x86: fix device passthrough on AMD SME.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)
iQEcBAABAgAGBQJariCQAAoJEL/70l94x66D6j4H/iS51f1EFRjTXbM+/D0BxpOD
hTz3tiV4JNezwXkxm9FMr7e5sfONTsqZodzCeXbz9XRmb6lwkEIbaPC4G2ALJeBH
V1Gpy2NsoBNCaU6Ci7SGqs1PG7wmG1tGMkzgkUoi2mwJRbA7UfnPmL1bTRESc4/w
oYN5xPj1/bLYWnok2cEJevND2VUTy+/dazpm+9gZzHqeoBnRRhhNluLW11A7yi2U
mSxAZrCH8X9EejIEhU8jAah4PYZ9tP8TmvUcnAPYpNgDh2JH6tlkGAYSbpadiCvf
FJNhtev67uDL1jPzqQJLNo5Z04cg06M+9cYqrLD1q287LXsKs+LHXJY/AI56oIM=
=YHkv
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"PPC:
- fix bug leading to lost IPIs and smp_call_function_many() lockups
on POWER9
ARM:
- locking fix
- reset fix
- GICv2 multi-source SGI injection fix
- GICv2-on-v3 MMIO synchronization fix
- make the console less verbose.
x86:
- fix device passthrough on AMD SME"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Fix device passthrough when SME is active
kvm: arm/arm64: vgic-v3: Tighten synchronization for guests using v2 on v3
KVM: arm/arm64: vgic: Don't populate multiple LRs with the same vintid
KVM: arm/arm64: Reduce verbosity of KVM init log
KVM: arm/arm64: Reset mapped IRQs on VM reset
KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN
KVM: arm/arm64: vgic: Add missing irq_lock to vgic_mmio_read_pending
KVM: PPC: Book3S HV: Fix trap number return from __kvmppc_vcore_entry
batadv_check_unicast_ttvn may redirect a packet to itself or another
originator. This involves rewriting the ttvn and the destination address in
the batadv unicast header. These field were not yet pulled (with skb rcsum
update) and thus any change to them also requires a change in the receive
checksum.
Reported-by: Matthias Schiffer <mschiffer@universe-factory.net>
Fixes: a73105b8d4 ("batman-adv: improved client announcement mechanism")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
'Commit 45dac1d6ea ("vmxnet3: Changes for vmxnet3 adapter version 2
(fwd)")' introduced a flag "lro" in structure vmxnet3_adapter which is
used to indicate whether LRO is enabled or not. However, the patch
did not set the flag and hence it was never exercised.
So, when LRO is enabled, it resulted in poor TCP performance due to
delayed acks. This issue is seen with packets which are larger than
the mss getting a delayed ack rather than an immediate ack, thus
resulting in high latency.
This patch removes the lro flag and directly uses device features
against NETIF_F_LRO to check if lro is enabled.
Fixes: 45dac1d6ea ("vmxnet3: Changes for vmxnet3 adapter version 2 (fwd)")
Reported-by: Rachel Lunnon <rachel_lunnon@stormagic.com>
Signed-off-by: Ronak Doshi <doshir@vmware.com>
Acked-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The field txNumDeferred is used by the driver to keep track of the number
of packets it has pushed to the emulation. The driver increments it on
pushing the packet to the emulation and the emulation resets it to 0 at
the end of the transmit.
There is a possibility of a race either when (a) ESX is under heavy load or
(b) workload inside VM is of low packet rate.
This race results in xmit hangs when network coalescing is disabled. This
change creates a local copy of txNumDeferred and uses it to perform ring
arithmetic.
Reported-by: Noriho Tanaka <ntanaka@vmware.com>
Signed-off-by: Ronak Doshi <doshir@vmware.com>
Acked-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti says:
====================
net/sched: fix NULL dereference in the error path of .init()
with several TC actions it's possible to see NULL pointer dereference,
when the .init() function calls tcf_idr_alloc(), fails at some point and
then calls tcf_idr_release(): this series fixes all them introducing
non-NULL tests in the .cleanup() function.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
According to AM335x TRM[1] 14.3.6.2, AM437x TRM[2] 15.3.6.2 and
DRA7 TRM[3] 24.11.4.8.7.3.3, in-band mode in EXT_EN(bit18) register is only
available when PHY is configured in RGMII mode with 10Mbps speed. It will
cause some networking issues without RGMII mode, such as carrier sense
errors and low throughput. TI also mentioned this issue in their forum[4].
This patch adds the check mechanism for PHY interface with RGMII interface
type, the in-band mode can only be set in RGMII mode with 10Mbps speed.
References:
[1]: https://www.ti.com/lit/ug/spruh73p/spruh73p.pdf
[2]: http://www.ti.com/lit/ug/spruhl7h/spruhl7h.pdf
[3]: http://www.ti.com/lit/ug/spruic2b/spruic2b.pdf
[4]: https://e2e.ti.com/support/arm/sitara_arm/f/791/p/640765/2392155
Suggested-by: Holsety Chen (陳憲輝) <Holsety.Chen@moxa.com>
Signed-off-by: SZ Lin (林上智) <sz.lin@moxa.com>
Signed-off-by: Schuyler Patton <spatton@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The driver implementation returns support for private flags, while
no private flags are present. When asked for the number of private
flags it returns the number of statistic flag names.
Fix this by returning EOPNOTSUPP for not implemented ethtool flags.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some HP laptops have a mute mute LED controlled by a pin VREF. The
Realtek codec driver updates the VREF via vmaster hook by calling
snd_hda_set_pin_ctl_cache().
This works fine as long as the driver is running in a normal mode.
However, when the VREF change happens during the codec being in
runtime PM suspend, the regmap access will skip and postpone the
actual register change. This ends up with the unchanged LED status
until the next runtime PM resume even if you change the Master mute
switch. (Interestingly, the machine keeps the LED status even after
the codec goes into D3 -- but it's another story.)
For improving this usability, let the driver temporarily powering up /
down only during the pin VREF change. This can be achieved easily by
wrapping the call with snd_hda_power_up_pm() / *_down_pm().
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199073
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
In commit 9ffcc3725f ("mlxsw: spectrum: Allow packets to be trapped
from any PG") I fixed a problem where packets could not be trapped to
the CPU due to exceeded shared buffer quotas. The mentioned commit
explains the problem in detail.
The problem was fixed by assigning a minimum quota for the CPU port and
the traffic class used for scheduling traffic to the CPU.
However, commit 117b0dad2d ("mlxsw: Create a different trap group list
for each device") assigned different traffic classes to different
packet types and rendered the fix useless.
Fix the problem by assigning a minimum quota for the CPU port and all
the traffic classes that are currently in use.
Fixes: 117b0dad2d ("mlxsw: Create a different trap group list for each device")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Eddie Shklaer <eddies@mellanox.com>
Tested-by: Eddie Shklaer <eddies@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
syzbot reported one use-after-free in pfifo_fast_enqueue() [1]
Issue here is that we can not reuse skb after a successful skb_array_produce()
since another cpu might have consumed it already.
I believe a similar problem exists in try_bulk_dequeue_skb_slow()
in case we put an skb into qdisc_enqueue_skb_bad_txq() for lockless qdisc.
[1]
BUG: KASAN: use-after-free in qdisc_pkt_len include/net/sch_generic.h:610 [inline]
BUG: KASAN: use-after-free in qdisc_qstats_cpu_backlog_inc include/net/sch_generic.h:712 [inline]
BUG: KASAN: use-after-free in pfifo_fast_enqueue+0x4bc/0x5e0 net/sched/sch_generic.c:639
Read of size 4 at addr ffff8801cede37e8 by task syzkaller717588/5543
CPU: 1 PID: 5543 Comm: syzkaller717588 Not tainted 4.16.0-rc4+ #265
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x24d lib/dump_stack.c:53
print_address_description+0x73/0x250 mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report+0x23c/0x360 mm/kasan/report.c:412
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
qdisc_pkt_len include/net/sch_generic.h:610 [inline]
qdisc_qstats_cpu_backlog_inc include/net/sch_generic.h:712 [inline]
pfifo_fast_enqueue+0x4bc/0x5e0 net/sched/sch_generic.c:639
__dev_xmit_skb net/core/dev.c:3216 [inline]
Fixes: c5ad119fb6 ("net: sched: pfifo_fast use skb_array")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot+ed43b6903ab968b16f54@syzkaller.appspotmail.com
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Just when I had decided that flush_cache_range() was always called with
a valid context, Helge reported two cases where the
"BUG_ON(!vma->vm_mm->context);" was hit on the phantom buildd:
kernel BUG at /mnt/sdb6/linux/linux-4.15.4/arch/parisc/kernel/cache.c:587!
CPU: 1 PID: 3254 Comm: kworker/1:2 Tainted: G D 4.15.0-1-parisc64-smp #1 Debian 4.15.4-1+b1
Workqueue: events free_ioctx
IAOQ[0]: flush_cache_range+0x164/0x168
IAOQ[1]: flush_cache_page+0x0/0x1c8
RP(r2): unmap_page_range+0xae8/0xb88
Backtrace:
[<00000000404a6980>] unmap_page_range+0xae8/0xb88
[<00000000404a6ae0>] unmap_single_vma+0xc0/0x188
[<00000000404a6cdc>] zap_page_range_single+0x134/0x1f8
[<00000000404a702c>] unmap_mapping_range+0x1cc/0x208
[<0000000040461518>] truncate_pagecache+0x98/0x108
[<0000000040461624>] truncate_setsize+0x9c/0xb8
[<00000000405d7f30>] put_aio_ring_file+0x80/0x100
[<00000000405d803c>] aio_free_ring+0x8c/0x290
[<00000000405d82c0>] free_ioctx+0x80/0x180
[<0000000040284e6c>] process_one_work+0x21c/0x668
[<00000000402854c4>] worker_thread+0x20c/0x778
[<0000000040291d44>] kthread+0x2d4/0x2e0
[<0000000040204020>] end_fault_vector+0x20/0xc0
This indicates that we need to handle the no context case in
flush_cache_range() as we do in flush_cache_mm().
In thinking about this, I realized that we don't need to flush the TLB
when there is no context. So, I added context checks to the large flush
cases in flush_cache_mm() and flush_cache_range(). The large flush case
occurs frequently in flush_cache_mm() and the change should improve fork
performance.
The v2 version of this change removes the BUG_ON from flush_cache_page()
by skipping the TLB flush when there is no context. I also added code
to flush the TLB in flush_cache_mm() and flush_cache_range() when we
have a context that's not current. Now all three routines handle TLB
flushes in a similar manner.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org # 4.9+
Signed-off-by: Helge Deller <deller@gmx.de>
-----BEGIN PGP SIGNATURE-----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=bXFe
-----END PGP SIGNATURE-----
Merge tag 'for-4.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"There's an important revert in this pull request that needs to go to
stable as it causes a corruption on big endian machines.
The other fix is for FIEMAP incorrectly reporting shared extents
before a sync and one fix for a crash in raid56.
So far we got only one report about the BE corruption, the stable
kernels were out for like a week, so hopefully the scope of the damage
is low"
* tag 'for-4.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Revert "btrfs: use proper endianness accessors for super_copy"
btrfs: add missing initialization in btrfs_check_shared
btrfs: Fix NULL pointer exception in find_bio_stripe
Emanuel reported an issue with a hang during microcode update because my
dumb idea to use one atomic synchronization variable for both rendezvous
- before and after update - was simply bollocks:
microcode: microcode_reload_late: late_cpus: 4
microcode: __reload_late: cpu 2 entered
microcode: __reload_late: cpu 1 entered
microcode: __reload_late: cpu 3 entered
microcode: __reload_late: cpu 0 entered
microcode: __reload_late: cpu 1 left
microcode: Timeout while waiting for CPUs rendezvous, remaining: 1
CPU1 above would finish, leave and the others will still spin waiting for
it to join.
So do two synchronization atomics instead, which makes the code a lot more
straightforward.
Also, since the update is serialized and it also takes quite some time per
microcode engine, increase the exit timeout by the number of CPUs on the
system.
That's ok because the moment all CPUs are done, that timeout will be cut
short.
Furthermore, panic when some of the CPUs timeout when returning from a
microcode update: we can't allow a system with not all cores updated.
Also, as an optimization, do not do the exit sync if microcode wasn't
updated.
Reported-by: Emanuel Czirai <xftroxgpx@protonmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Emanuel Czirai <xftroxgpx@protonmail.com>
Tested-by: Ashok Raj <ashok.raj@intel.com>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lkml.kernel.org/r/20180314183615.17629-2-bp@alien8.de
Return UCODE_NEW from the scanning functions to denote that new microcode
was found and only then attempt the expensive synchronization dance.
Reported-by: Emanuel Czirai <xftroxgpx@protonmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Emanuel Czirai <xftroxgpx@protonmail.com>
Tested-by: Ashok Raj <ashok.raj@intel.com>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lkml.kernel.org/r/20180314183615.17629-1-bp@alien8.de
-----BEGIN PGP SIGNATURE-----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=lSpS
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-for-v4.16-rc6' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"i915, amd and nouveau fixes.
i915:
- backlight fix for some panels
- pm fix
- fencing fix
- some GVT fixes
amdgpu:
- backlight fix across suspend/resume
- object destruction ordering issue fix
- displayport fix
nouveau:
- two backlight fixes
- fix for some lockups
Pretty quiet week, seems like everyone was fixing backlights"
* tag 'drm-fixes-for-v4.16-rc6' of git://people.freedesktop.org/~airlied/linux:
drm/nouveau/bl: fix backlight regression
drm/nouveau/bl: Fix oops on driver unbind
drm/nouveau/mmu: ALIGN_DOWN correct variable
drm/i915/gvt: fix user copy warning by whitelist workload rb_tail field
drm/i915/gvt: Correct the privilege shadow batch buffer address
drm/amdgpu/dce: Don't turn off DP sink when disconnected
drm/amdgpu: save/restore backlight level in legacy dce code
drm/radeon: fix prime teardown order
drm/amdgpu: fix prime teardown order
drm/i915: Kick the rps worker when changing the boost frequency
drm/i915: Only prune fences after wait-for-all
drm/i915: Enable VBT based BL control for DP
drm/i915/gvt: keep oa config in shadow ctx
drm/i915/gvt: Add runtime_pm_get/put into gvt_switch_mmio
Checking for 0 is insufficient: when an SKB without a batadv header, but
with a VLAN header is received, hdr_size will be 4, making the following
code interpret the Ethernet header as a batadv header.
Fixes: be1db4f661 ("batman-adv: make the Distributed ARP Table vlan aware")
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Tejun Heo