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2018-07-27thermal: rcar_thermal: avoid NULL dereference in absence of IRQ resourcesSimon Horman1-1/+1
Ensure that the base address used by a call to rcar_thermal_common_write() may be NULL if the SOC supports interrupts for use with the thermal device but none are defined in DT as is the case for R-Car H1 (r8a7779). Guard against this condition to prevent a NULL dereference when the device is probed. Tested on: * R-Mobile APE6 (r8a73a4) / APE6EVM * R-Car H1 (r8a7779) / Marzen * R-Car H2 (r8a7790) / Lager * R-Car M2-W (r8a7791) / Koelsch * R-Car M2-N (r8a7793) / Gose * R-Car D3 ES1.0 (r8a77995) / Draak Fixes: 1969d9dc2079 ("thermal: rcar_thermal: add r8a77995 support") Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: samsung: Remove Exynos5440 clock handling left-oversKrzysztof Kozlowski1-5/+0
Commit 8014220d48e7 ("thermal: samsung: Remove support for Exynos5440") removed the Exynos5440 specific part of code for accessing TMU interrupt registers but the surrounding clock handling was left. Clean it up. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: Fix negative temperature reportingAmit Kucheria1-8/+5
The current code will always return 0xffffffff in case of negative temperatures due to a bug in how the binary sign extension is being done. Use sign_extend32() instead. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: switch from of_iomap() to devm_ioremap_resource()Amit Kucheria1-6/+7
devm_ioremap_resources() automatically requests resources (so that the I/O region shows up in /proc/iomem) and devm_ wrappers do better error handling and unmapping of the I/O region when needed. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: Rename variableAmit Kucheria2-8/+8
We're actually reading the temperature from the status register. Fix the variable name to reflect that. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: Add generic support for TSENS v2 IPAmit Kucheria3-1/+12
SDM845 uses v2 of the TSENS IP block but the get_temp() function appears to be identical across v2.x.y in code seen so far. We use the generic get_temp() function defined as part of ops_generic_v2. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: Rename tsens-8996 to tsens-v2 for reuseAmit Kucheria2-18/+9
The TSENS block inside the 8996 is internally classified as version 2 of the IP. Several other SoC families use this block and can share this code. We rename get_temp() to reflect that it can be used across the v2 family. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: Add support to split up register address space into twoAmit Kucheria3-2/+15
There are two banks of registers for v2 TSENS IPs: SROT and TM. On older SoCs these were contiguous, leading to DTs mapping them as one register address space of size 0x2000. In newer SoCs, these two banks are not contiguous anymore. Add logic to init_common() to differentiate between old and new DTs and adjust associated offsets for the TM register bank so that the old DTs will continue to function correctly. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt: thermal: tsens: Document the fallback DT property for v2 of TSENS IPAmit Kucheria1-6/+25
We want to create common code for v2 of the TSENS IP block that is used in a large number of Qualcomm SoCs. "qcom,tsens-v2" should be able to handle most of the common functionality start with a common get_temp() function. It is also necessary to split out the memory regions for the TM and SROT register banks because their offsets are not constant across SoC families. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: tsens: Get rid of unused fields in structureAmit Kucheria1-2/+0
status_field and trdy are unused in any of the tsens drivers. Remove them. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Rajendra Nayak <rnayak@codeaurora.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal_hwmon: Pass the originating device down to hwmon_device_register_with_infoMarc Zyngier1-1/+1
When registering the hwmon device, we pass NULL as the device. While this doesn't result in any immediate breakage, it leaves the hwmon device at the root of the virtual devices, rather than attached to the thermal zone hierarchy. Instead, let's pass the actual device, which is part of the thermal_zone_device structure. This also avoids the rather unpleasant ""NULL device *" which can be generated by dev_{err,info} in the hwmon subsystem. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal_hwmon: Sanitize attribute name passed to hwmonMarc Zyngier1-0/+1
My Chromebook Plus (kevin) is spitting the following at boot time: (NULL device *): hwmon: 'sbs-9-000b' is not a valid name attribute, please fix Clearly, __hwmon_device_register is unhappy about the property name. Some investigation reveals that thermal_add_hwmon_sysfs doesn't sanitize the name of the attribute. In order to keep it quiet, let's replace '-' with '_' in hwmon->type This is consistent with what iio-hwmon does since b92fe9e3379c8. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: thermal: armada: add reference to new bindingsMiquel Raynal1-0/+5
New bindings (using a syscon) are available for AP806 and CP110 compatibles. Add a reference to these files from the original documentation. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: cp110: add the thermal node in the syscon fileMiquel Raynal1-0/+37
Explain the thermal bindings now that the thermal IP is described being inside of a system controller. Add a reference to the thermal-zone node. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: cp110: update documentation since DT de-duplicationMiquel Raynal1-5/+5
CP110 master/slave DT files have been merged in a DT de-duplication work merged in v4.16. Update the syscon documentation accordingly to match the current state of the DT nodes. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: ap806: add the thermal node in the syscon fileMiquel Raynal1-0/+38
Explain the thermal bindings now that the thermal IP is described being inside of a system controller. Add a reference to the thermal-zone node. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: cp110: prepare the syscon file to list other syscons nodesMiquel Raynal1-7/+7
There are multiple system controllers in CP110. Because all syscon nodes use the same compatible, it is pertinent to use this same file to list IPs inside it. Thus, change the header to be more generic, and align with AP806 file. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: ap806: prepare the syscon file to list other syscons nodesMiquel Raynal1-5/+5
There are multiple system controllers in AP806. Because all syscon nodes use the same compatible, it is pertinent to use this same file to list IPs inside it. Thus, change the header to be more generic. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27dt-bindings: cp110: rename cp110 syscon fileMiquel Raynal1-0/+0
There is no need to give numbers to system controllers inside the documentation as the syscons use the same compatibles. Furthermore, this approach does not scale very well and would force the creation of a new file each time a new syscon is added in the device tree. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: get rid of the ->is_valid() pointerMiquel Raynal1-9/+4
The implementation of armada_is_valid() is very simple and is the same across all the versions of the IP since the ->is_valid_bit has been introduced. Simplify the structure by getting rid of the function pointer and calling directly the function. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: move validity check out of the read functionMiquel Raynal1-7/+7
Sensor selection when using multiple sensors already checks for the sensor validity. Move it to the legacy ->get_temp() hook, where it is still needed. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: remove sensors validity from the IP initializationMiquel Raynal1-6/+3
When using new bindings with multiple sensors, sensor validity is checked twice because sensor selection also checks for the validity. Remove the redundant call from the IP initialization helper and move it to the legacy probe section where it is still needed. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: add multi-channel sensors supportMiquel Raynal1-21/+114
MVEBU thermal IP supports multiple channels. Each channel may have several sensors but for now each channel is wired to only one thermal sensor. The first channel always points to the so called internal sensor, within the thermal IP. There is usually one more channel (with one sensor each time) per CPU. The code has been written to support possible evolutions of the ap806 IP that would embed more CPUs and thus more channels to select. Each channel should be referenced in the device tree as an independent thermal zone. Add the possibility to read each of these sensors through sysfs by registering all the sensors (translated in "thermal_zone"). Also add a mutex on these accesses to avoid read conflicts (only one channel/sensor may be selected and read at a time). Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: use the resource managed registration helper alternativeMiquel Raynal1-22/+100
Current use of thermal_zone_device_register() triggers a warning at boot and should be replaced by devm_thermal_zone_of_sensor_register(). This allows better handling of multiple thermal zones for later multi-sensors support. Also change the driver data to embed a new structure to make the difference between legacy data (which needs to be cleaned) and syscon-related data. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: convert driver to syscon register accessesMiquel Raynal1-70/+129
Until recently, only one register was referenced in MVEBU thermal IP node. Recent changes added a second entry pointing to another register right next to it. We cannot know for sure that we will not have to access other registers. That will be actually the case when overheat interrupt feature will come, where it will be needed to access DFX registers in the same area. This approach is not scalable so instead of adding consinuously memory areas in the DT (and change the DT bindings, while keeping backward compatibility), move the thermal node into a wider syscon from which it will be possible to also configure the thermal interrupt. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: average over samples to avoid glitchesMiquel Raynal1-0/+25
Configure the sample frequency and number of averaged samples. This is needed for two reasons: 1/ To be bootloader independent. 2/ To prepare the introduction of multi-sensors support by preventing inconsistencies when reading temperatures that could be a mean of samples took from different sensors. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: dissociate a380 and cp110 ->init() hooksMiquel Raynal1-1/+7
Until now, Armada 380 and CP110 could share the same ->init() function because their use was identical. Prepare the support of multi-sensors support and overheat interrupt feature by separating the initialization paths before they actually diverge. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: rename the initialization routineMiquel Raynal1-20/+20
Calling a hook ->init_sensor() while what is initialized is the IP itself and not the sensors is misleading. Rename the hook ->init() to avoid any confusion in later work bringing multi-sensors support. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: remove misleading commentsMiquel Raynal1-2/+0
On older versions of this thermal IP, TSEN referred as the internal sensor in the thermal IP while EXT_TSEN referred as sensors outside of this IP, ie in the CPUs most of the time. The bit names in the specifications do not follow this rule anymore, so remove these comments that are misleading. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: remove useless register accessesMiquel Raynal1-6/+2
Prepare the migration to use regmaps by first simplifying the initialization functions: avoid unnecessary write/read cycles on configuration registers. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: armada: add a function that sanitizes the thermal zone nameMiquel Raynal1-1/+36
Thermal zone names must follow certain rules imposed by the framework. They are limited in length and shall not have any hyphen '-'. This is done in a separate function for future use in another location. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-27thermal: ti-soc-thermal: remove dead codeBartlomiej Zolnierkiewicz9-654/+5
Majority of this code (i.e. functions from ti-bandgap.c) has been introduced in May 2013 by commit eb982001dbd8 ("thermal: introduce TI SoC thermal driver"). Just remove it altogether (in case it is needed it can be easily resurrected from git repo). While at it fix incorrect "not used" comments. Tested-by: Keerthy <j-keerthy@ti.com> Acked-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-02thermal: i.MX: Allow thermal probe to fail gracefully in case of bad calibration.Jean-Christophe Dubois1-1/+4
Without this fix, the thermal probe on i.MX6 might trigger a division by zero exception later in the probe if the calibration does fail. Note: This linux behavior (Division by zero in kernel) has been triggered on a Qemu i.MX6 emulation where parameters in nvmem were not set. With this fix the division by zero is not triggeed anymore as the thermal probe does fail early. Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-01Linux 4.18-rc3Linus Torvalds1-1/+1
2018-06-29parisc: Build kernel without -ffunction-sectionsHelge Deller1-4/+0
As suggested by Nick Piggin it seems we can drop the -ffunction-sections compile flag, now that the kernel uses thin archives. Testing with 32- and 64-bit kernel showed no difference in kernel size. Suggested-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de>
2018-06-29sg: remove ->sg_magic memberJens Axboe4-45/+0
This was introduced more than a decade ago when sg chaining was added, but we never really caught anything with it. The scatterlist entry size can be critical, since drivers allocate it, so remove the magic member. Recently it's been triggering allocation stalls and failures in NVMe. Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-29drbd: Fix drbd_request_prepare() discard handlingBart Van Assche1-2/+2
Fix the test that verifies whether bio_op(bio) represents a discard or write zeroes operation. Compile-tested only. Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Lars Ellenberg <lars.ellenberg@linbit.com> Fixes: 7435e9018f91 ("drbd: zero-out partial unaligned discards on local backend") Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-29blk-mq: don't queue more if we get a busy returnJens Axboe1-0/+12
Some devices have different queue limits depending on the type of IO. A classic case is SATA NCQ, where some commands can queue, but others cannot. If we have NCQ commands inflight and encounter a non-queueable command, the driver returns busy. Currently we attempt to dispatch more from the scheduler, if we were able to queue some commands. But for the case where we ended up stopping due to BUSY, we should not attempt to retrieve more from the scheduler. If we do, we can get into a situation where we attempt to queue a non-queueable command, get BUSY, then successfully retrieve more commands from that scheduler and queue those. This can repeat forever, starving the non-queuable command indefinitely. Fix this by NOT attempting to pull more commands from the scheduler, if we get a BUSY return. This should also be more optimal in terms of letting requests stay in the scheduler for as long as possible, if we get a BUSY due to the regular out-of-tags condition. Reviewed-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-29aio: mark __aio_sigset::sigmask constAvi Kivity1-1/+1
io_pgetevents() will not change the signal mask. Mark it const to make it clear and to reduce the need for casts in user code. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Avi Kivity <avi@scylladb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> [hch: reapply the patch that got incorrectly reverted] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-29net: handle NULL ->poll gracefullyChristoph Hellwig1-0/+2
The big aio poll revert broke various network protocols that don't implement ->poll as a patch in the aio poll serie removed sock_no_poll and made the common code handle this case. Reported-by: syzbot+57727883dbad76db2ef0@syzkaller.appspotmail.com Reported-by: syzbot+cdb0d3176b53d35ad454@syzkaller.appspotmail.com Reported-by: syzbot+2c7e8f74f8b2571c87e8@syzkaller.appspotmail.com Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Fixes: a11e1d432b51 ("Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-29i2c: gpio: initialize SCL to HIGH againWolfram Sang1-2/+2
It seems that during the conversion from gpio* to gpiod*, the initial state of SCL was wrongly switched to LOW. Fix it to be HIGH again. Fixes: 7bb75029ef34 ("i2c: gpio: Enforce open drain through gpiolib") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2018-06-29i2c: smbus: kill memory leak on emulated and failed DMA SMBus xfersPeter Rosin1-5/+9
If DMA safe memory was allocated, but the subsequent I2C transfer fails the memory is leaked. Plug this leak. Fixes: 8a77821e74d6 ("i2c: smbus: use DMA safe buffers for emulated SMBus transactions") Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2018-06-29i2c: algos: bit: mention our experience about initial statesWolfram Sang1-0/+5
So, if somebody wants to re-implement this in the future, we pinpoint to a problem case. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-06-29Revert "i2c: algo-bit: init the bus to a known state"Wolfram Sang1-5/+0
This reverts commit 3e5f06bed72fe72166a6778f630241a893f67799. As per bugzilla #200045, this caused a regression. I don't really see a way to fix it without having the hardware. So, revert the patch and I will fix the issue I was seeing originally in the i2c-gpio driver itself. I couldn't find new users of this algorithm since, so there should be no one depending on the new behaviour. Reported-by: Sergey Larin <cerg2010cerg2010@mail.ru> Fixes: 3e5f06bed72f ("i2c: algo-bit: init the bus to a known state") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Tested-by: Sergey Larin <cerg2010cerg2010@mail.ru> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2018-06-28selinux: move user accesses in selinuxfs out of locked regionsJann Horn1-45/+33
If a user is accessing a file in selinuxfs with a pointer to a userspace buffer that is backed by e.g. a userfaultfd, the userspace access can stall indefinitely, which can block fsi->mutex if it is held. For sel_read_policy(), remove the locking, since this method doesn't seem to access anything that requires locking. For sel_read_bool(), move the user access below the locked region. For sel_write_bool() and sel_commit_bools_write(), move the user access up above the locked region. Cc: stable@vger.kernel.org Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jann Horn <jannh@google.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> [PM: removed an unused variable in sel_read_policy()] Signed-off-by: Paul Moore <paul@paul-moore.com>
2018-06-28parisc: Reduce debug output in unwind codeHelge Deller1-2/+2
Signed-off-by: Helge Deller <deller@gmx.de>
2018-06-28dm: prevent DAX mounts if not supportedRoss Zwisler2-5/+5
Currently device_supports_dax() just checks to see if the QUEUE_FLAG_DAX flag is set on the device's request queue to decide whether or not the device supports filesystem DAX. Really we should be using bdev_dax_supported() like filesystems do at mount time. This performs other tests like checking to make sure the dax_direct_access() path works. We also explicitly clear QUEUE_FLAG_DAX on the DM device's request queue if any of the underlying devices do not support DAX. This makes the handling of QUEUE_FLAG_DAX consistent with the setting/clearing of most other flags in dm_table_set_restrictions(). Now that bdev_dax_supported() explicitly checks for QUEUE_FLAG_DAX, this will ensure that filesystems built upon DM devices will only be able to mount with DAX if all underlying devices also support DAX. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Fixes: commit 545ed20e6df6 ("dm: add infrastructure for DAX support") Cc: stable@vger.kernel.org Acked-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2018-06-28dax: check for QUEUE_FLAG_DAX in bdev_dax_supported()Ross Zwisler1-0/+8
Add an explicit check for QUEUE_FLAG_DAX to __bdev_dax_supported(). This is needed for DM configurations where the first element in the dm-linear or dm-stripe target supports DAX, but other elements do not. Without this check __bdev_dax_supported() will pass for such devices, letting a filesystem on that device mount with the DAX option. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Suggested-by: Mike Snitzer <snitzer@redhat.com> Fixes: commit 545ed20e6df6 ("dm: add infrastructure for DAX support") Cc: stable@vger.kernel.org Acked-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2018-06-28pmem: only set QUEUE_FLAG_DAX for fsdax modeRoss Zwisler1-1/+2
QUEUE_FLAG_DAX is an indication that a given block device supports filesystem DAX and should not be set for PMEM namespaces which are in "raw" mode. These namespaces lack struct page and are prevented from participating in filesystem DAX as of commit 569d0365f571 ("dax: require 'struct page' by default for filesystem dax"). Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Suggested-by: Mike Snitzer <snitzer@redhat.com> Fixes: 569d0365f571 ("dax: require 'struct page' by default for filesystem dax") Cc: stable@vger.kernel.org Acked-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2018-06-28proc: add Alexey to MAINTAINERSAlexey Dobriyan1-0/+9
I know I'll regret it. Link: http://lkml.kernel.org/r/20180627194840.GA18113@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>