GCC complains on unused-but-set-variable, clean this up.
Fixes: 23898c763f ('net/mlx5: E-Switch, Modify node guid on vf set MAC')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently, link notifications are not sent by
bond_set_slave_link_state() upon enslavement if
the slave is enslaved when up.
This happens because slave->link default init value
is 0, which is the same as BOND_LINK_UP, resulting
in bond_set_slave_link_state() ignoring this transition.
This patch sets the default value of slave->link to
BOND_LINK_NOCHANGE, assuring it will count as a state
transition and thus trigger notification logic.
Signed-off-by: Aviv Heller <avivh@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The RTL8152 doesn't have U1U2 and U2P3 features, so use different
runtime functions for RTL812 and RTL8153 by adding autosuspend_en()
to rtl_ops.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This reverts commit 1e4a806403.
This creates more problems than it solves right now. Compile
testing needs to go in with patches fixing the problems it
uncovers.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
of_address_to_resource return 0 on successful call but
devm_ioremap_resource is called only if it returns non-zero value
Signed-off-by: Lukasz Gemborowski <lukasz.gemborowski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Commit 497fbe2498 ("i2c: tegra: enable multi master mode for tegra210")
enables the Tegra I2C 'div_clk' for adapters using the multi-master mode
during the device probe. Although the probe error path was updated to
disable the clock on probe failure, there is one place after calling
tegra_i2c_init() where the clock will not be disabled on failure. Correct
the error path so that the 'div_clk' is disabled if calling
tegra_i2c_init() fails.
Fixes: 497fbe2498 ("i2c: tegra: enable multi master mode for tegra210")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
When mapping an interrupt to a VP(E) we must use the identifier for the
VP that the hardware expects, and this does not always match up with the
Linux CPU number. Commit d46812bb0b ("irqchip: mips-gic: Use HW IDs
for VPE_OTHER_ADDR") corrected this for the cases that existed at the
time it was written, but commit 2af70a9620 ("irqchip/mips-gic: Add a
IPI hierarchy domain") added another case before the former patch was
merged. This leads to incorrectly using Linux CPU numbers when mapping
interrupts to VPs, which breaks on certain systems such as those with
multi-core I6400 CPUs. Fix by adding the appropriate call to
mips_cm_vp_id() to retrieve the expected VP identifier.
Fixes: d46812bb0b ("irqchip: mips-gic: Use HW IDs for VPE_OTHER_ADDR")
Fixes: 2af70a9620 ("irqchip/mips-gic: Add a IPI hierarchy domain")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Qais Yousef <qsyousef@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20160705132600.27730-1-paul.burton@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This solves the issue that a headphone is not working on the docking
unit.
Signed-off-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
A qeth_card contains a napi_struct linked to the net_device during
device probing. This struct must be deleted when removing the qeth
device, otherwise Panic on oops can occur when qeth devices are
repeatedly removed and added.
Fixes: a1c3ed4c9c ("qeth: NAPI support for l2 and l3 discipline")
Cc: stable@vger.kernel.org # v2.6.37+
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Tested-by: Alexander Klein <ALKL@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This reverts commit a788a4a040.
This patch is wrong, the type returned doesn't fit
what the error pointer macros expect.
Signed-off-by: David S. Miller <davem@davemloft.net>
This is likely that checking 'fman->fifo_offset' instead of
'fman->cam_offset' is expected here.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Several Lenovo users have reported problems with their Sierra
Wireless EM7455 modem. The driver has loaded successfully and
the MBIM management channel has appeared to work, including
establishing a connection to the mobile network. But no frames
have been received over the data interface.
The problem affects all EM7455 and MC7455, and is assumed to
affect other modems based on the same Qualcomm chipset and
baseband firmware.
Testing narrowed the problem down to what seems to be a
firmware timing bug during initialization. Adding a short sleep
while probing is sufficient to make the problem disappear.
Experiments have shown that 1-2 ms is too little to have any
effect, while 10-20 ms is enough to reliably succeed.
Reported-by: Stefan Armbruster <ml001@armbruster-it.de>
Reported-by: Ralph Plawetzki <ralph@purejava.org>
Reported-by: Andreas Fett <andreas.fett@secunet.com>
Reported-by: Rasmus Lerdorf <rasmus@lerdorf.com>
Reported-by: Samo Ratnik <samo.ratnik@gmail.com>
Reported-and-tested-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
If register_pernet_subsys() fails, we shouldn't try to call
unregister_pernet_subsys().
Fixes: 467fa15356 ("RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns.")
Cc: stable@vger.kernel.org
Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
For ipv6+udp+geneve encapsulation data, the max_mtu should subtract
sizeof(ipv6hdr), instead of sizeof(iphdr).
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This reverts commit 923b93e451.
Make sure consumers do not overwrite gpio flags for pins that have
already been claimed.
While adding support for gpio drivers to refuse a request using
unsupported flags, the order of when the requested flag was checked and
the new flags were applied was reversed to that consumers could
overwrite flags for already requested gpios.
This not only affects device-tree setups where two drivers could request
the same gpio using conflicting configurations, but also allowed user
space to clear gpio flags for already claimed pins simply by attempting
to export them through the sysfs interface. By for example clearing the
FLAG_ACTIVE_LOW flag this way, user space could effectively change the
polarity of a signal.
Reverting this change obviously prevents gpio drivers from doing sanity
checks on the flags in their request callbacks. Fortunately only one
recently added driver (gpio-tps65218 in v4.6) appears to do this, and a
follow up patch could restore this functionality through a different
interface.
Cc: stable <stable@vger.kernel.org> # 4.4
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This fixes the issue descirbe in bug 117531
(https://bugzilla.kernel.org/show_bug.cgi?id=117531).
It's a regression introduced in linux 4.5 that causes a Oops at load of
gpio_sch and prevents powering off the computer.
The issue is that sch_gpio_reg_set is called in sch_gpio_probe before
gpio_chip data is initialized with the pointer to the sch_gpio struct. As
sch_gpio_reg_set calls gpiochip_get_data, it returns NULL which causes
the Oops.
The patch follows Mika's advice (https://lkml.org/lkml/2016/5/9/61) and
consists in modifying sch_gpio_reg_get and sch_gpio_reg_set to take a
sch_gpio struct directly instead of a gpio_chip, which avoids the call to
gpiochip_get_data.
Thanks Mika for your patience with me :-)
Cc: stable@vger.kernel.org
Signed-off-by: Colin Pitrat <colin.pitrat@gmail.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Snooze is a poll idle state in powernv and pseries platforms. Snooze
has a timeout so that if a CPU stays in snooze for more than target
residency of the next available idle state, then it would exit
thereby giving chance to the cpuidle governor to re-evaluate and
promote the CPU to a deeper idle state. Therefore whenever snooze
exits due to this timeout, its last_residency will be target_residency
of the next deeper state.
Commit e93e59ce5b "cpuidle: Replace ktime_get() with local_clock()"
changed the math around last_residency calculation. Specifically,
while converting last_residency value from nano- to microseconds, it
carries out right shift by 10. Because of that, in snooze timeout
exit scenarios last_residency calculated is roughly 2.3% less than
target_residency of the next available state. This pattern is picked
up by get_typical_interval() in the menu governor and therefore
expected_interval in menu_select() is frequently less than the
target_residency of any state other than snooze.
Due to this we are entering snooze at a higher rate, thereby
affecting the single thread performance.
Fix this by using more precise division via ktime_us_delta().
Fixes: e93e59ce5b "cpuidle: Replace ktime_get() with local_clock()"
Reported-by: Anton Blanchard <anton@samba.org>
Bisected-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The user timer tu->qused counter may go to a negative value when
multiple concurrent reads are performed since both the check and the
decrement of tu->qused are done in two individual locked contexts.
This results in bogus read outs, and the endless loop in the
user-space side.
The fix is to move the decrement of the tu->qused counter into the
same spinlock context as the zero-check of the counter.
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Per VT-d spec Section 10.4.2 ("Capability Register"), the maximum
number of possible domains is 64K; indeed this is the maximum value
that the cap_ndoms() macro will expand to. Since the value 65536
will not fix in a u16, the 'did' variable must be promoted to an
int, otherwise the test for < 65536 will always be true and the
loop will never end.
The symptom, in my case, was a hung machine during suspend.
Fixes: 3bd4f9112f ("iommu/vt-d: Fix overflow of iommu->domains array")
Signed-off-by: Aaron Campbell <aaron@monkey.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Pull fuse fix from Miklos Szeredi:
"This makes sure userspace filesystems are not broken by the parallel
lookups and readdir feature"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: serialize dirops by default
Pull overlayfs fixes from Miklos Szeredi:
"This contains fixes for a dentry leak, a regression in 4.6 noticed by
Docker users and missing write access checking in truncate"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: warn instead of error if d_type is not supported
ovl: get_write_access() in truncate
ovl: fix dentry leak for default_permissions
This patch updates the event constraints for non-PEBS mode for
Intel Broadwell and Skylake processors. When HT is off, each
CPU gets 8 generic counters. However, not all events can be
programmed on any of the 8 counters. This patch adds the
constraints for the MEM_* events which can only be measured on the
bottom 4 counters. The constraints are also valid when HT is off
because, then, there are only 4 generic counters and they are the
bottom counters.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/1467411742-13245-1-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
overlay needs underlying fs to support d_type. Recently I put in a
patch in to detect this condition and started failing mount if
underlying fs did not support d_type.
But this breaks existing configurations over kernel upgrade. Those who
are running docker (partially broken configuration) with xfs not
supporting d_type, are surprised that after kernel upgrade docker does
not run anymore.
https://github.com/docker/docker/issues/22937#issuecomment-229881315
So instead of erroring out, detect broken configuration and warn
about it. This should allow existing docker setups to continue
working after kernel upgrade.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 45aebeaf4f ("ovl: Ensure upper filesystem supports d_type")
Cc: <stable@vger.kernel.org> 4.6
Pull MIPS fix from Ralf Baechle:
"Only a single fix for 4.7 pending at this point. It fixes an issue
that may lead to corruption of the cache mode bits in the page table"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: Fix possible corruption of cache mode by mprotect.
- tm: Always reclaim in start_thread() for exec() class syscalls from Cyril Bur
- tm: Avoid SLB faults in treclaim/trecheckpoint when RI=0 from Michael Neuling
- eeh: Fix wrong argument passed to eeh_rmv_device() from Gavin Shan
- Initialise pci_io_base as early as possible from Darren Stevens
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Merge tag 'powerpc-4.7-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- tm: Always reclaim in start_thread() for exec() class syscalls from
Cyril Bur
- tm: Avoid SLB faults in treclaim/trecheckpoint when RI=0 from Michael
Neuling
- eeh: Fix wrong argument passed to eeh_rmv_device() from Gavin Shan
- Initialise pci_io_base as early as possible from Darren Stevens
* tag 'powerpc-4.7-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Initialise pci_io_base as early as possible
powerpc/tm: Avoid SLB faults in treclaim/trecheckpoint when RI=0
powerpc/eeh: Fix wrong argument passed to eeh_rmv_device()
powerpc/tm: Always reclaim in start_thread() for exec() class syscalls
When initializing the PHY control register, the FIFO depth bits are
written without reading the previous register value, i.e. all other
bits are overwritten with zero. This disables automatic MDI-X
configuration, which is enabled by default. Fix initialization by doing
a read/modify/write operation.
Signed-off-by: Stefan Hauser <stefan@shauser.net>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The interrupt worker code for the enc28j60 relies only on the TXIF flag to
determinate if the packet transmission was completed. However the datasheet
specifies in section 12.1.3 that TXERIF will clear the TXRTS after a
transmit abort. Also in section 12.1.4 that TXIF will be set
when TXRTS transitions from '1' to '0'. Therefore the TXIF flag is enabled
during transmission errors.
This causes a race condition, since the worker code will invoke
enc28j60_tx_clear() -> netif_wake_queue(), potentially invoking the
ndo_start_xmit function to send a new packet. The enc28j60_send_packet function
uses a workqueue that invokes enc28j60_hw_tx(). In between this function is
called, the worker from the interrupt handler will enter the path for error
handler because of the TXERIF flag, causing to invoke enc28j60_tx_clear() again
and releasing the packet scheduled for transmission, causing a kernel crash with
due a NULL pointer.
These crashes due a NULL pointer were observed under stress conditions of the
device. A BUG_ON() sequence was used to validate the issue was fixed, and has
been running without problems for 2 years now.
Signed-off-by: Diego Dompe <dompe@hpe.com>
Acked-by: Sergio Valverde <sergio.valverde@hpe.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(resent due to overhelpful mail client corrupting patch)
At least on Meson GXBB, the CORE_IRQ_MTL_RX_OVERFLOW interrupt is thrown
with the stmmac1000 driver, which does not support set_rx_tail_ptr. With
this patch and the clock fixes, 1G ethernet works on ODROID-C2.
Signed-off-by: Matt Corallo <git@bluematt.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull drm fixes frlm Dave Airlie:
"Just some AMD and Intel fixes, the AMD ones are further production
Polaris fixes, and the Intel ones fix some early timeouts, some PCI ID
changes and a couple of other fixes.
Still a bit Internet challenged here, hopefully end of next week will
solve it"
* tag 'drm-fixes-for-v4.7-rc6' of git://people.freedesktop.org/~airlied/linux:
drm/i915: Fix missing unlock on error in i915_ppgtt_info()
drm/amd/powerplay: workaround for UVD clock issue
drm/amdgpu: add ACLK_CNTL setting for polaris10
drm/amd/powerplay: fix issue uvd dpm can't enabled on Polaris11.
drm/amd/powerplay: Workaround for Memory EDC Error on Polaris10.
drm/i915: Removing PCI IDs that are no longer listed as Kabylake.
drm/i915: Add more Kabylake PCI IDs.
drm/i915: Avoid early timeout during AUX transfers
drm/i915/hsw: Avoid early timeout during LCPLL disable/restore
drm/i915/lpt: Avoid early timeout during FDI PHY reset
drm/i915/bxt: Avoid early timeout during PLL enable
drm/i915: Refresh cached DP port register value on resume
drm/amd/powerplay: Update CKS on/ CKS off voltage offset calculation
drm/amd/powerplay: disable FFC.
drm/amd/powerplay: add some definition for FFC feature on polaris.
A few small driver-specific fixes for SPI, all in the normal important
if you hit them category especially the rockchip driver fix which
addresses a race which has been exposed more frequently with some recent
performance improvements.
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Merge tag 'spi-fix-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few small driver-specific fixes for SPI, all in the normal important
if you hit them category especially the rockchip driver fix which
addresses a race which has been exposed more frequently with some
recent performance improvements"
* tag 'spi-fix-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: sunxi: fix transfer timeout
spi: sun4i: fix FIFO limit
spi: rockchip: Signal unfinished DMA transfers
spi: spi-ti-qspi: Suspend the queue before removing the device
Two small fixes for the regulator subsystem - one fixing a crash with
one of the devices supported by the max77620 driver, another fixing
startup for the anatop regulator when it starts up with the regulator in
bypass mode.
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Merge tag 'regulator-fix-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"Two small fixes for the regulator subsystem - one fixing a crash with
one of the devices supported by the max77620 driver, another fixing
startup for the anatop regulator when it starts up with the regulator
in bypass mode"
* tag 'regulator-fix-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: max77620: check for valid regulator info
regulator: anatop: allow regulator to be in bypass mode
rockchip clk driver fixes for newly added rk3399 support.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A small fix for the newly added oxnas clk driver and a handful of
rockchip clk driver fixes for newly added rk3399 support"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: Fix return value check in oxnas_stdclk_probe()
clk: rockchip: release io resource when failing to init clk on rk3399
clk: rockchip: fix cpuclk registration error handling
clk: rockchip: Revert "clk: rockchip: reset init state before mmc card initialization"
clk: rockchip: fix incorrect parent for rk3399's {c,g}pll_aclk_perihp_src
clk: rockchip: mark rk3399 GIC clocks as critical
clk: rockchip: initialize flags of clk_init_data in mmc-phase clock
A small clutch of hardware specific fixes for various ASoC devices, all
small individually and important if you have that device but not
otherwise.
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Merge tag 'asoc-fix-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v4.7
A small clutch of hardware specific fixes for various ASoC devices, all
small individually and important if you have that device but not
otherwise.
here's a batch of i915 fixes for 4.7.
* tag 'drm-intel-fixes-2016-06-30' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Fix missing unlock on error in i915_ppgtt_info()
drm/i915: Removing PCI IDs that are no longer listed as Kabylake.
drm/i915: Add more Kabylake PCI IDs.
drm/i915: Avoid early timeout during AUX transfers
drm/i915/hsw: Avoid early timeout during LCPLL disable/restore
drm/i915/lpt: Avoid early timeout during FDI PHY reset
drm/i915/bxt: Avoid early timeout during PLL enable
drm/i915: Refresh cached DP port register value on resume
Just a few more late fixes for Polaris cards.
* 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux:
drm/amd/powerplay: workaround for UVD clock issue
drm/amdgpu: add ACLK_CNTL setting for polaris10
drm/amd/powerplay: fix issue uvd dpm can't enabled on Polaris11.
drm/amd/powerplay: Workaround for Memory EDC Error on Polaris10.
drm/amd/powerplay: Update CKS on/ CKS off voltage offset calculation
drm/amd/powerplay: disable FFC.
drm/amd/powerplay: add some definition for FFC feature on polaris.
The following testcase may result in a page table entries with a invalid
CCA field being generated:
static void *bindstack;
static int sysrqfd;
static void protect_low(int protect)
{
mprotect(bindstack, BINDSTACK_SIZE, protect);
}
static void sigbus_handler(int signal, siginfo_t * info, void *context)
{
void *addr = info->si_addr;
write(sysrqfd, "x", 1);
printf("sigbus, fault address %p (should not happen, but might)\n",
addr);
abort();
}
static void run_bind_test(void)
{
unsigned int *p = bindstack;
p[0] = 0xf001f001;
write(sysrqfd, "x", 1);
/* Set trap on access to p[0] */
protect_low(PROT_NONE);
write(sysrqfd, "x", 1);
/* Clear trap on access to p[0] */
protect_low(PROT_READ | PROT_WRITE | PROT_EXEC);
write(sysrqfd, "x", 1);
/* Check the contents of p[0] */
if (p[0] != 0xf001f001) {
write(sysrqfd, "x", 1);
/* Reached, but shouldn't be */
printf("badness, shouldn't happen but does\n");
abort();
}
}
int main(void)
{
struct sigaction sa;
sysrqfd = open("/proc/sysrq-trigger", O_WRONLY);
if (sigprocmask(SIG_BLOCK, NULL, &sa.sa_mask)) {
perror("sigprocmask");
return 0;
}
sa.sa_sigaction = sigbus_handler;
sa.sa_flags = SA_SIGINFO | SA_NODEFER | SA_RESTART;
if (sigaction(SIGBUS, &sa, NULL)) {
perror("sigaction");
return 0;
}
bindstack = mmap(NULL,
BINDSTACK_SIZE,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (bindstack == MAP_FAILED) {
perror("mmap bindstack");
return 0;
}
printf("bindstack: %p\n", bindstack);
run_bind_test();
printf("done\n");
return 0;
}
There are multiple ingredients for this:
1) PAGE_NONE is defined to _CACHE_CACHABLE_NONCOHERENT, which is CCA 3
on all platforms except SB1 where it's CCA 5.
2) _page_cachable_default must have bits set which are not set
_CACHE_CACHABLE_NONCOHERENT.
3) Either the defective version of pte_modify for XPA or the standard
version must be in used. However pte_modify for the 36 bit address
space support is no affected.
In that case additional bits in the final CCA mode may generate an invalid
value for the CCA field. On the R10000 system where this was tracked
down for example a CCA 7 has been observed, which is Uncached Accelerated.
Fixed by:
1) Using the proper CCA mode for PAGE_NONE just like for all the other
PAGE_* pte/pmd bits.
2) Fix the two affected variants of pte_modify.
Further code inspection also shows the same issue to exist in pmd_modify
which would affect huge page systems.
Issue in pte_modify tracked down by Alastair Bridgewater, PAGE_NONE
and pmd_modify issue found by me.
The history of this goes back beyond Linus' git history. Chris Dearman's
commit 351336929c ("[MIPS] Allow setting of
the cache attribute at run time.") missed the opportunity to fix this
but it was originally introduced in lmo commit
d523832cf12007b3242e50bb77d0c9e63e0b6518 ("Missing from last commit.")
and 32cc38229ac7538f2346918a09e75413e8861f87 ("New configuration option
CONFIG_MIPS_UNCACHED.")
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: Alastair Bridgewater <alastair.bridgewater@gmail.com>
Since commit 103544d869 (ACPI,PCI,IRQ: reduce resource requirements)
the penalty values are calculated on the fly rather than at boot time.
This works fine for PCI interrupts but not so well for ISA interrupts.
The information on whether or not an ISA interrupt is in use is not
available to the pci_link.c code directly. That information is
obtained from the outside via acpi_penalize_isa_irq(). [If its
"active" argument is true, then the IRQ is in use by ISA.]
Since the current code relies on PCI Link objects for determination
of penalties, we are factoring in the PCI penalty twice after
acpi_penalize_isa_irq() function is called.
To avoid that, limit the newly added functionality to just PCI
interrupts so that old behavior is still maintained.
Fixes: 103544d869 (ACPI,PCI,IRQ: reduce resource requirements)
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Tested-by: Wim Osterholt <wim@djo.tudelft.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Trying to make the ISA and PCI init functionality common turned out
to be a bad idea, because the ISA path depends on external
functionality.
Restore the previous behavior and limit the refactoring to PCI
interrupts only.
Fixes: 1fcb6a813c "ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init()"
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Tested-by: Wim Osterholt <wim@djo.tudelft.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The change introduced in commit 103544d869 (ACPI,PCI,IRQ: reduce
resource requirements) omitted the initially applied PCI_POSSIBLE
penalty when the IRQ is active.
Incorrect calculation of the penalty leads the ACPI code to assigning
a wrong interrupt number to a PCI INTx interrupt.
This would not be as bad as it sounds in theory. It would just cause
the interrupts to be shared and result in performance penalty.
However, some drivers (like the parallel port driver) don't like
interrupt sharing and in the above case they will causes all of
the PCI drivers wanting to share the interrupt to be unable to
request it.
The issue has not been caught in testing because the behavior is
platform-specific and depends on the peripherals ending up sharing
the IRQ and their drivers.
Before the above commit the code would add the PCI_POSSIBLE value
divided by the number of possible IRQ users to the IRQ penalty
during initialization.
Later in that code path, if the IRQ is chosen as the active IRQ or
if it is used by ISA; additional penalties are added.
Fixes: 103544d869 (ACPI,PCI,IRQ: reduce resource requirements)
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Tested-by: Wim Osterholt <wim@djo.tudelft.nl>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix an expression in the ACPI PCI IRQ management code added by a
recent commit that overlooked missing parens in it, so the result
of the computation is incorrect in some cases (Sinan Kaya).
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Merge tag 'acpi-4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Fix an expression in the ACPI PCI IRQ management code added by a
recent commit that overlooked missing parens in it, so the result of
the computation is incorrect in some cases (Sinan Kaya)"
* tag 'acpi-4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI,PCI,IRQ: correct operator precedence
- Fix a recent intel_pstate regression that caused the number of
wakeups to increase significantly on an idle system in some cases
due to excessive synchronize_sched() invocations (Rafael Wysocki).
- Fix unnecessary invocations of WARN_ON() in the cpufreq core
after cpufreq has been suspended introduced during the 4.6 cycla
(Rafael Wysocki).
- Fix an error code path in the cpufreq-dt-platdev driver that
forgets to drop a reference to a DT node (Masahiro Yamada).
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Merge tag 'pm-4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Three cpufreq fixes, one in the core (stable-candidate) and two in
drivers (intel_pstate and cpufreq-dt).
Specifics:
- Fix a recent intel_pstate regression that caused the number of
wakeups to increase significantly on an idle system in some cases
due to excessive synchronize_sched() invocations (Rafael Wysocki).
- Fix unnecessary invocations of WARN_ON() in the cpufreq core after
cpufreq has been suspended introduced during the 4.6 cycla (Rafael
Wysocki).
- Fix an error code path in the cpufreq-dt-platdev driver that
forgets to drop a reference to a DT node (Masahiro Yamada)"
* tag 'pm-4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: Avoid false-positive WARN_ON()s in cpufreq_update_policy()
cpufreq: dt: call of_node_put() before error out
intel_pstate: Do not clear utilization update hooks on policy changes
Pull vfs fixes from Al Viro:
"Tmpfs readdir throughput regression fix (this cycle) + some -stable
fodder all over the place.
One missing bit is Miklos' tonight locks.c fix - NFS folks had already
grabbed that one by the time I woke up ;-)"
[ The locks.c fix came through the nfsd tree just moments ago ]
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
namespace: update event counter when umounting a deleted dentry
9p: use file_dentry()
ceph: fix d_obtain_alias() misuses
lockless next_positive()
libfs.c: new helper - next_positive()
dcache_{readdir,dir_lseek}(): don't bother with nested ->d_lock
leases on overlayfs.
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Merge tag 'nfsd-4.7-3' of git://linux-nfs.org/~bfields/linux
Pull lockd/locks fixes from Bruce Fields:
"One fix for lockd soft lookups in an error path, and one fix for file
leases on overlayfs"
* tag 'nfsd-4.7-3' of git://linux-nfs.org/~bfields/linux:
locks: use file_inode()
lockd: unregister notifier blocks if the service fails to come up completely
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Merge tag 'mfd-fixes-4.7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull more MFD fixes from Lee Jones:
"Apologies for missing these from the first pull request.
Final patches fixing Reset API change"
* tag 'mfd-fixes-4.7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
usb: dwc3: st: Use explicit reset_control_get_exclusive() API
phy: phy-stih407-usb: Use explicit reset_control_get_exclusive() API
phy: miphy28lp: Inform the reset framework that our reset line may be shared
Pull libnvdimm fixes from Dan Williams:
"1/ Two regression fixes since v4.6: one for the byte order of a sysfs
attribute (bz121161) and another for QEMU 2.6's NVDIMM _DSM (ACPI
Device Specific Method) implementation that gets tripped up by new
auto-probing behavior in the NFIT driver.
2/ A fix tagged for -stable that stops the kernel from
clobbering/ignoring changes to the configuration of a 'pfn'
instance ("struct page" driver). For example changing the
alignment from 2M to 1G may silently revert to 2M if that value is
currently stored on media.
3/ A fix from Eric for an xfstests failure in dax. It is not
currently tagged for -stable since it requires an 8-exabyte file
system to trigger, and there appear to be no user visible side
effects"
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
nfit: fix format interface code byte order
dax: fix offset overflow in dax_io
acpi, nfit: fix acpi_check_dsm() vs zero functions implemented
libnvdimm, pfn, dax: fix initialization vs autodetect for mode + alignment
Fix incorrect use of nla_strlcpy() where the first NLA_HDRLEN bytes
of the link name where left out.
Making the output of tipc-config -ls look something like:
Link statistics:
dcast-link
1:data0-1.1.2:data0
1:data0-1.1.3:data0
Also, for the record, the patch that introduce this regression
claims "Sending the whole object out can cause a leak". Which isn't
very likely as this is a compat layer, where the data we are parsing
is generated by us and we know the string to be NULL terminated. But
you can of course never be to secure.
Fixes: 5d2be1422e (tipc: fix an infoleak in tipc_nl_compat_link_dump)
Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
