1. 31 Mar, 2019 1 commit
    • Fabrice Gasnier's avatar
      iio: core: fix a possible circular locking dependency · 7f75591f
      Fabrice Gasnier authored
      This fixes a possible circular locking dependency detected warning seen
      with:
      - CONFIG_PROVE_LOCKING=y
      - consumer/provider IIO devices (ex: "voltage-divider" consumer of "adc")
      
      When using the IIO consumer interface, e.g. iio_channel_get(), the consumer
      device will likely call iio_read_channel_raw() or similar that rely on
      'info_exist_lock' mutex.
      
      typically:
      ...
      	mutex_lock(&chan->indio_dev->info_exist_lock);
      	if (chan->indio_dev->info == NULL) {
      		ret = -ENODEV;
      		goto err_unlock;
      	}
      	ret = do_some_ops()
      err_unlock:
      	mutex_unlock(&chan->indio_dev->info_exist_lock);
      	return ret;
      ...
      
      Same mutex is also hold in iio_device_unregister().
      
      The following deadlock warning happens when:
      - the consumer device has called an API like iio_read_channel_raw()
        at least once.
      - the consumer driver is unregistered, removed (unbind from sysfs)
      
      ======================================================
      WARNING: possible circular locking dependency detected
      4.19.24 #577 Not tainted
      ------------------------------------------------------
      sh/372 is trying to acquire lock:
      (kn->count#30){++++}, at: kernfs_remove_by_name_ns+0x3c/0x84
      
      but task is already holding lock:
      (&dev->info_exist_lock){+.+.}, at: iio_device_unregister+0x18/0x60
      
      which lock already depends on the new lock.
      
      the existing dependency chain (in reverse order) is:
      
      -> #1 (&dev->info_exist_lock){+.+.}:
             __mutex_lock+0x70/0xa3c
             mutex_lock_nested+0x1c/0x24
             iio_read_channel_raw+0x1c/0x60
             iio_read_channel_info+0xa8/0xb0
             dev_attr_show+0x1c/0x48
             sysfs_kf_seq_show+0x84/0xec
             seq_read+0x154/0x528
             __vfs_read+0x2c/0x15c
             vfs_read+0x8c/0x110
             ksys_read+0x4c/0xac
             ret_fast_syscall+0x0/0x28
             0xbedefb60
      
      -> #0 (kn->count#30){++++}:
             lock_acquire+0xd8/0x268
             __kernfs_remove+0x288/0x374
             kernfs_remove_by_name_ns+0x3c/0x84
             remove_files+0x34/0x78
             sysfs_remove_group+0x40/0x9c
             sysfs_remove_groups+0x24/0x34
             device_remove_attrs+0x38/0x64
             device_del+0x11c/0x360
             cdev_device_del+0x14/0x2c
             iio_device_unregister+0x24/0x60
             release_nodes+0x1bc/0x200
             device_release_driver_internal+0x1a0/0x230
             unbind_store+0x80/0x130
             kernfs_fop_write+0x100/0x1e4
             __vfs_write+0x2c/0x160
             vfs_write+0xa4/0x17c
             ksys_write+0x4c/0xac
             ret_fast_syscall+0x0/0x28
             0xbe906840
      
      other info that might help us debug this:
      
       Possible unsafe locking scenario:
      
             CPU0                    CPU1
             ----                    ----
        lock(&dev->info_exist_lock);
                                     lock(kn->count#30);
                                     lock(&dev->info_exist_lock);
        lock(kn->count#30);
      
       *** DEADLOCK ***
      ...
      
      cdev_device_del() can be called without holding the lock. It should be safe
      as info_exist_lock prevents kernelspace consumers to use the exported
      routines during/after provider removal. cdev_device_del() is for userspace.
      
      Help to reproduce:
      See example: Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
      sysv {
      	compatible = "voltage-divider";
      	io-channels = <&adc 0>;
      	output-ohms = <22>;
      	full-ohms = <222>;
      };
      
      First, go to iio:deviceX for the "voltage-divider", do one read:
      $ cd /sys/bus/iio/devices/iio:deviceX
      $ cat in_voltage0_raw
      
      Then, unbind the consumer driver. It triggers above deadlock warning.
      $ cd /sys/bus/platform/drivers/iio-rescale/
      $ echo sysv > unbind
      
      Note I don't actually expect stable will pick this up all the
      way back into IIO being in staging, but if's probably valid that
      far back.
      Signed-off-by: default avatarFabrice Gasnier <fabrice.gasnier@st.com>
      Fixes: ac917a81 ("staging:iio:core set the iio_dev.info pointer to null on unregister")
      Cc: <Stable@vger.kernel.org>
      Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
      7f75591f
  2. 24 Mar, 2019 1 commit
  3. 16 Mar, 2019 6 commits
  4. 09 Mar, 2019 10 commits
  5. 08 Mar, 2019 22 commits
    • Linus Torvalds's avatar
      Merge tag 'io_uring-2019-03-06' of git://git.kernel.dk/linux-block · 38e7571c
      Linus Torvalds authored
      Pull io_uring IO interface from Jens Axboe:
       "Second attempt at adding the io_uring interface.
      
        Since the first one, we've added basic unit testing of the three
        system calls, that resides in liburing like the other unit tests that
        we have so far. It'll take a while to get full coverage of it, but
        we're working towards it. I've also added two basic test programs to
        tools/io_uring. One uses the raw interface and has support for all the
        various features that io_uring supports outside of standard IO, like
        fixed files, fixed IO buffers, and polled IO. The other uses the
        liburing API, and is a simplified version of cp(1).
      
        This adds support for a new IO interface, io_uring.
      
        io_uring allows an application to communicate with the kernel through
        two rings, the submission queue (SQ) and completion queue (CQ) ring.
        This allows for very efficient handling of IOs, see the v5 posting for
        some basic numbers:
      
          https://lore.kernel.org/linux-block/20190116175003.17880-1-axboe@kernel.dk/
      
        Outside of just efficiency, the interface is also flexible and
        extendable, and allows for future use cases like the upcoming NVMe
        key-value store API, networked IO, and so on. It also supports async
        buffered IO, something that we've always failed to support in the
        kernel.
      
        Outside of basic IO features, it supports async polled IO as well.
        This particular feature has already been tested at Facebook months ago
        for flash storage boxes, with 25-33% improvements. It makes polled IO
        actually useful for real world use cases, where even basic flash sees
        a nice win in terms of efficiency, latency, and performance. These
        boxes were IOPS bound before, now they are not.
      
        This series adds three new system calls. One for setting up an
        io_uring instance (io_uring_setup(2)), one for submitting/completing
        IO (io_uring_enter(2)), and one for aux functions like registrating
        file sets, buffers, etc (io_uring_register(2)). Through the help of
        Arnd, I've coordinated the syscall numbers so merge on that front
        should be painless.
      
        Jon did a writeup of the interface a while back, which (except for
        minor details that have been tweaked) is still accurate. Find that
        here:
      
          https://lwn.net/Articles/776703/
      
        Huge thanks to Al Viro for helping getting the reference cycle code
        correct, and to Jann Horn for his extensive reviews focused on both
        security and bugs in general.
      
        There's a userspace library that provides basic functionality for
        applications that don't need or want to care about how to fiddle with
        the rings directly. It has helpers to allow applications to easily set
        up an io_uring instance, and submit/complete IO through it without
        knowing about the intricacies of the rings. It also includes man pages
        (thanks to Jeff Moyer), and will continue to grow support helper
        functions and features as time progresses. Find it here:
      
          git://git.kernel.dk/liburing
      
        Fio has full support for the raw interface, both in the form of an IO
        engine (io_uring), but also with a small test application (t/io_uring)
        that can exercise and benchmark the interface"
      
      * tag 'io_uring-2019-03-06' of git://git.kernel.dk/linux-block:
        io_uring: add a few test tools
        io_uring: allow workqueue item to handle multiple buffered requests
        io_uring: add support for IORING_OP_POLL
        io_uring: add io_kiocb ref count
        io_uring: add submission polling
        io_uring: add file set registration
        net: split out functions related to registering inflight socket files
        io_uring: add support for pre-mapped user IO buffers
        block: implement bio helper to add iter bvec pages to bio
        io_uring: batch io_kiocb allocation
        io_uring: use fget/fput_many() for file references
        fs: add fget_many() and fput_many()
        io_uring: support for IO polling
        io_uring: add fsync support
        Add io_uring IO interface
      38e7571c
    • Linus Torvalds's avatar
      Merge tag 'for-5.1/block-20190302' of git://git.kernel.dk/linux-block · 80201fe1
      Linus Torvalds authored
      Pull block layer updates from Jens Axboe:
       "Not a huge amount of changes in this round, the biggest one is that we
        finally have Mings multi-page bvec support merged. Apart from that,
        this pull request contains:
      
         - Small series that avoids quiescing the queue for sysfs changes that
           match what we currently have (Aleksei)
      
         - Series of bcache fixes (via Coly)
      
         - Series of lightnvm fixes (via Mathias)
      
         - NVMe pull request from Christoph. Nothing major, just SPDX/license
           cleanups, RR mp policy (Hannes), and little fixes (Bart,
           Chaitanya).
      
         - BFQ series (Paolo)
      
         - Save blk-mq cpu -> hw queue mapping, removing a pointer indirection
           for the fast path (Jianchao)
      
         - fops->iopoll() added for async IO polling, this is a feature that
           the upcoming io_uring interface will use (Christoph, me)
      
         - Partition scan loop fixes (Dongli)
      
         - mtip32xx conversion from managed resource API (Christoph)
      
         - cdrom registration race fix (Guenter)
      
         - MD pull from Song, two minor fixes.
      
         - Various documentation fixes (Marcos)
      
         - Multi-page bvec feature. This brings a lot of nice improvements
           with it, like more efficient splitting, larger IOs can be supported
           without growing the bvec table size, and so on. (Ming)
      
         - Various little fixes to core and drivers"
      
      * tag 'for-5.1/block-20190302' of git://git.kernel.dk/linux-block: (117 commits)
        block: fix updating bio's front segment size
        block: Replace function name in string with __func__
        nbd: propagate genlmsg_reply return code
        floppy: remove set but not used variable 'q'
        null_blk: fix checking for REQ_FUA
        block: fix NULL pointer dereference in register_disk
        fs: fix guard_bio_eod to check for real EOD errors
        blk-mq: use HCTX_TYPE_DEFAULT but not 0 to index blk_mq_tag_set->map
        block: optimize bvec iteration in bvec_iter_advance
        block: introduce mp_bvec_for_each_page() for iterating over page
        block: optimize blk_bio_segment_split for single-page bvec
        block: optimize __blk_segment_map_sg() for single-page bvec
        block: introduce bvec_nth_page()
        iomap: wire up the iopoll method
        block: add bio_set_polled() helper
        block: wire up block device iopoll method
        fs: add an iopoll method to struct file_operations
        loop: set GENHD_FL_NO_PART_SCAN after blkdev_reread_part()
        loop: do not print warn message if partition scan is successful
        block: bounce: make sure that bvec table is updated
        ...
      80201fe1
    • Linus Torvalds's avatar
      Merge tag 'for-5.1/libata-20190301' of git://git.kernel.dk/linux-block · 4221b807
      Linus Torvalds authored
      Pull libata updates from Jens Axboe:
       "Pretty quiet round: a few small fixes, comment typo, and most notably
        a low level driver for the PATA Buddha controller"
      
      * tag 'for-5.1/libata-20190301' of git://git.kernel.dk/linux-block:
        ata: libahci: Only warn for AHCI_HFLAG_MULTI_MSI set when genuine custom irq handler implemented
        libata: fix a typo in comment
        ata: macio: Use of_node_name_eq for node name comparisons
        ata: pata_samsung_cf: simplify getting .driver_data
        ata: pata_platform: Add IRQF_SHARED to IRQ flags
        ata: pata_of_platform: Allow to use 16-bit wide data transfer
        ata: add Buddha PATA controller driver
      4221b807
    • Linus Torvalds's avatar
      Merge tag 'gpio-v5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio · 3601fe43
      Linus Torvalds authored
      Pull GPIO updates from Linus Walleij:
       "This is the bulk of GPIO changes for the v5.1 cycle:
      
        Core changes:
      
         - The big change this time around is the irqchip handling in the
           qualcomm pin controllers, closely coupled with the gpiochip. This
           rework, in a classic fall-between-the-chairs fashion has been
           sidestepped for too long.
      
           The Qualcomm IRQchips using the SPMI and SSBI transport mechanisms
           have been rewritten to use hierarchical irqchip. This creates the
           base from which I intend to gradually pull support for hierarchical
           irqchips into the gpiolib irqchip helpers to cut down on duplicate
           code.
      
           We have too many hacks in the kernel because people have been
           working around the missing hierarchical irqchip for years, and once
           it was there, noone understood it for a while. We are now slowly
           adapting to using it.
      
           This is why this pull requests include changes to MFD, SPMI,
           IRQchip core and some ARM Device Trees pertaining to the Qualcomm
           chip family. Since Qualcomm have so many chips and such large
           deployments it is paramount that this platform gets this right, and
           now it (hopefully) does.
      
         - Core support for pull-up and pull-down configuration, also from the
           device tree. When a simple GPIO chip supports an "off or on" pull-up
           or pull-down resistor, we provide a way to set this up using
           machine descriptors or device tree.
      
           If more elaborate control of pull up/down (such as resistance shunt
           setting) is required, drivers should be phased over to use pin
           control. We do not yet provide a userspace ABI for this pull
           up-down setting but I suspect the makers are going to ask for it
           soon enough. PCA953x is the first user of this new API.
      
         - The GPIO mockup driver has been revamped after some discussion
           improving the IRQ simulator in the process.
      
           The idea is to make it possible to use the mockup for both testing
           and virtual prototyping, e.g. when you do not yet have a GPIO
           expander to play with but really want to get something to develop
           code around before hardware is available. It's neat. The blackbox
           testing usecase is currently making its way into kernelci.
      
         - ACPI GPIO core preserves non direction flags when updating flags.
      
         - A new device core helper for devm_platform_ioremap_resource() is
           funneled through the GPIO tree with Greg's ACK.
      
        New drivers:
      
         - TQ-Systems QTMX86 GPIO controllers (using port-mapped I/O)
      
         - Gateworks PLD GPIO driver (vaccumed up from OpenWrt)
      
         - AMD G-Series PCH (Platform Controller Hub) GPIO driver.
      
         - Fintek F81804 & F81966 subvariants.
      
         - PCA953x now supports NXP PCAL6416.
      
        Driver improvements:
      
         - IRQ support on the Nintendo Wii (Hollywood) GPIO.
      
         - get_direction() support for the MVEBU driver.
      
         - Set the right output level on SAMA5D2.
      
         - Drop the unused irq trigger setting on the Spreadtrum driver.
      
         - Wakeup support for PCA953x.
      
         - A slew of cleanups in the various Intel drivers"
      
      * tag 'gpio-v5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (110 commits)
        gpio: gpio-omap: fix level interrupt idling
        gpio: amd-fch: Set proper output level for direction_output
        x86: apuv2: remove unused variable
        gpio: pca953x: Use PCA_LATCH_INT
        platform/x86: fix PCENGINES_APU2 Kconfig warning
        gpio: pca953x: Fix dereference of irq data in shutdown
        gpio: amd-fch: Fix type error found by sparse
        gpio: amd-fch: Drop const from resource
        gpio: mxc: add check to return defer probe if clock tree NOT ready
        gpio: ftgpio: Register per-instance irqchip
        gpio: ixp4xx: Add DT bindings
        x86: pcengines apuv2 gpio/leds/keys platform driver
        gpio: AMD G-Series PCH gpio driver
        drivers: depend on HAS_IOMEM for devm_platform_ioremap_resource()
        gpio: tqmx86: Set proper output level for direction_output
        gpio: sprd: Change to use SoC compatible string
        gpio: sprd: Use SoC compatible string instead of wildcard string
        gpio: of: Handle both enable-gpio{,s}
        gpio: of: Restrict enable-gpio quirk to regulator-gpio
        gpio: davinci: use devm_platform_ioremap_resource()
        ...
      3601fe43
    • Linus Torvalds's avatar
      Merge tag 'mfd-next-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd · cf2e8c54
      Linus Torvalds authored
      Pull MFD updates from Lee Jones:
       "New Drivers:
         - Add STMPE ADC Input driver
         - Add STMicroelectronics STPMIC1 Parent driver
         - Add STMicroelectronics STPMIC1 OnKey Misc driver
         - Add STMicroelectronics STPMIC1 Watchdog driver
         - Add Cirrus Logic Lochnagar Parent driver
         - Add TQ-Systems TQMX86 Parent driver
      
        New Device Support:
         - Add support for ADC to STMPE
      
        New (or moved) Functionality:
         - Move Lightbar functionality to its own driver; cros_ec_lightbar
         - Move VBC functionality to its own driver; cros_ec_vbc
         - Move VBC functionality to its own driver; cros_ec_vbc
         - Move DebugFS functionality to its own driver; cros_ec_debugfs
         - Move SYSFS functionality to its own driver; cros_ec_sysfs
         - Add support for input voltage options; tps65218
      
        Fixes:
         - Use devm_* managed resources; cros_ec
         - Device Tree documentation; stmpe, aspeed-lpc, lochnagar
         - Trivial Clean-ups; stmpe
         - Rip out broken modular code; aat2870-core, adp5520, as3711,
               db8500-prcmu, htc-i2cpld, max8925-core, rc5t583, sta2x11-mfd,
      	 syscon, tps65090, tps65910, tps68470 tps80031, wm831x-spi,
      	 wm831x-i2c, wm831x-core, wm8350-i2c, wm8350-core, wm8400-core
         - Kconfig fixups; INTEL_SOC_PMIC
         - Improve error path; sm501, sec-core
         - Use struct_size() helper; sm501
         - Constify; at91-usart
         - Use pointers instead of copying data; at91-usart
         - Deliver proper return value; cros_ec_dev
         - Trivial formatting/whitespace; sec-core"
      
      * tag 'mfd-next-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (53 commits)
        mfd: mxs-lradc: Mark expected switch fall-through
        mfd: sec-core: Cleanup formatting to a consistent style
        mfd: tqmx86: IO controller with I2C, Wachdog and GPIO
        mfd: intel-lpss: Move linux/pm.h to the local header
        mfd: cros_ec_dev: Return number of bytes read with CROS_EC_DEV_IOCRDMEM
        mfd: tps68470: Drop unused MODULE_DEVICE_TABLE
        mfd: at91-usart: No need to copy mfd_cell in probe
        mfd: at91-usart: Constify at91_usart_spi_subdev and at91_usart_serial_subdev
        mfd: lochnagar: Add support for the Cirrus Logic Lochnagar
        mfd: lochnagar: Add initial binding documentation
        dt-bindings: mfd: aspeed-lpc: Make parameter optional
        mfd: sec-core: Return gracefully instead of BUG() if device cannot match
        mfd: sm501: Use struct_size() in devm_kzalloc()
        mfd: sm501: Fix potential NULL pointer dereference
        mfd: Kconfig: Fix I2C_DESIGNWARE_PLATFORM dependencies
        mfd: tps65218.c: Add input voltage options
        mfd: wm8400-core: Make it explicitly non-modular
        mfd: wm8350-core: Drop unused module infrastructure from non-modular code
        mfd: wm8350-i2c: Make it explicitly non-modular
        mfd: wm831x-core: Drop unused module infrastructure from non-modular code
        ...
      cf2e8c54
    • Linus Torvalds's avatar
      Merge tag 'backlight-next-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight · 04e03618
      Linus Torvalds authored
      Pull backlight fixlet from Lee Jones:
       "Allow GPIO call to sleep in pwm_bl driver"
      
      * tag 'backlight-next-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
        backlight: pwm_bl: Use gpiod_get_value_cansleep() to get initial state
      04e03618
    • Linus Torvalds's avatar
      Merge tag 'rtc-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux · f8d35403
      Linus Torvalds authored
      Pull RTC updates from Alexandre Belloni:
       "There is an unusual amount of new drivers this cycle, and this
        explains the number of insertions.
      
        Other than that, the changes are the usual fixes and feature addition.
      
        Subsystem updates:
         - new quartz-load-femtofarads DT property for quartz load capacitance
         - remove rtc_class_ops.read_callback
      
        New drivers:
         - Abracon AB-RTCMC-32.768kHz-EOZ9
         - Amlogic Meson RTC
         - Cadence RTC IP
         - Microcrystal RV3028
         - Whwave sd3078
      
        Driver updates:
         - cmos: ignore bogus century byte
         - ds1307: rework rx8130 support
         - isl1208: add isl1209 support, nvmem support
         - rs5C372: report invalid time when the oscillator stopped
         - rx8581: add rx8571 support"
      
      * tag 'rtc-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (66 commits)
        rtc: pic32: convert to SPDX identifier
        rtc: pic32: let the core handle range
        rtc: pic32: convert to devm_rtc_allocate_device
        rtc: update my email address
        rtc: rv8803: convert to SPDX identifier
        rtc: rv8803: let the core handle range
        rtc: tx4939: convert to SPDX identifier
        rtc: tx4939: use .set_time
        rtc: tx4939: switch to rtc_time64_to_tm/rtc_tm_to_time64
        rtc: tx4939: set range
        rtc: tx4939: remove useless test
        rtc: zynqmp: let the core handle range
        rtc: zynqmp: fix possible race condition
        rtc: imx-sc: use rtc_time64_to_tm
        rtc: rx8581: Add support for Epson rx8571 RTC
        dt-bindings: rtc: add rx8571 compatible
        rtc: pcf85063: remove dead code
        rtc: remove rtc_class_ops.read_callback
        rtc: add AB-RTCMC-32.768kHz-EOZ9 RTC support
        dt-bindings: rtc: add ABEOZ9
        ...
      f8d35403
    • Linus Torvalds's avatar
      Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal · 9f24a81e
      Linus Torvalds authored
      Pull thermal soc updates from Eduardo Valentin:
       "Specifics:
      
         - mediatek thermal now supports MT8183
      
         - broadcom thermal now supports Stingray
      
         - qoirq now supports multiple sensors
      
         - fixes on different drivers: rcar, tsens, tegra
      
        Some new drivers are still pending further review and I chose to leave
        them for the next merge window while still sending this material"
      
      * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
        thermal: rcar_gen3_thermal: Register hwmon sysfs interface
        thermal/qcom/tsens-common : fix possible object reference leak
        thermal: tegra: add get_trend ops
        thermal: tegra: fix memory allocation
        thermal: tegra: remove unnecessary warnings
        thermal: mediatek: add support for MT8183
        dt-bindings: thermal: add binding document for mt8183 thermal controller
        thermal: mediatek: add flag for bank selection
        thermal: mediatek: add thermal controller offset
        thermal: mediatek: add calibration item
        thermal: mediatek: add common index of vts settings.
        thermal: mediatek: fix register index error
        thermal: qoriq: add multiple sensors support
        thermal: broadcom: Add Stingray thermal driver
        dt-bindings: thermal: Add binding document for SR thermal
      9f24a81e
    • Linus Torvalds's avatar
      Merge branch 'stable/for-linus-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft · 564e7411
      Linus Torvalds authored
      Pull ibft updates from Konrad Rzeszutek Wilk:
       "Two tiny fixes - a missing break, and upgrading the subsystem to use
        modern macros"
      
      * 'stable/for-linus-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
        iscsi_ibft: use virt_to_phys instead of isa_virt_to_bus
        iscsi_ibft: Fix missing break in switch statement
      564e7411
    • Linus Torvalds's avatar
      Merge branch 'stable/for-linus-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb · e4ff63b4
      Linus Torvalds authored
      Pull swiotlb updates from Konrad Rzeszutek Wilk:
       "Expands the SWIOTLB to have debugfs support (along with bug-fixes),
        and a tiny fix"
      
      * 'stable/for-linus-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
        swiotlb: drop pointless static qualifier in swiotlb_create_debugfs()
        swiotlb: checking whether swiotlb buffer is full with io_tlb_used
        swiotlb: add debugfs to track swiotlb buffer usage
        swiotlb: fix comment on swiotlb_bounce()
      e4ff63b4
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 6c3f98fa
      Linus Torvalds authored
      Pull i2c updates from Wolfram Sang:
      
       - the I2C core gained helpers to assist drivers in handling their
         suspended state, and drivers were converted to use it
      
       - two new fault-injectors for stress-testing
      
       - bigger refactoring and feature improvements for the ocores,
         sh_mobile, and tegra drivers
      
       - platform_data removal for the at24 EEPROM driver
      
       - ... and various improvements and bugfixes all over the subsystem
      
      * 'i2c/for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (69 commits)
        i2c: Allow recovery of the initial IRQ by an I2C client device.
        i2c: ocores: turn incomplete kdoc into a comment
        i2c: designware: Do not allow i2c_dw_xfer() calls while suspended
        i2c: tegra: Only display error messages if DMA setup fails
        i2c: gpio: fault-injector: add 'inject_panic' injector
        i2c: gpio: fault-injector: add 'lose_arbitration' injector
        i2c: tegra: remove multi-master support
        i2c: tegra: remove master fifo support on tegra186
        i2c: tegra: change phrasing, "fallbacking" to "falling back"
        i2c: expand minor range when registering chrdev region
        i2c: aspeed: Add multi-master use case support
        i2c: core-smbus: don't trace smbus_reply data on errors
        i2c: ocores: Add support for bus clock via platform data
        i2c: ocores: Add support for IO mapper registers.
        i2c: ocores: checkpatch fixes
        i2c: ocores: add SPDX tag
        i2c: ocores: add polling interface
        i2c: ocores: do not handle IRQ if IF is not set
        i2c: ocores: stop transfer on timeout
        i2c: tegra: add i2c interface timing support
        ...
      6c3f98fa
    • Linus Torvalds's avatar
      Merge tag 'for-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply · 1cabd3e0
      Linus Torvalds authored
      Pull power supply and reset updates from Sebastian Reichel:
       "Nothing too fancy in the power-supply subsystem this time. There are
        less patches than usual, since I did not have enough time to review
        them in time. The good news is, that all patches have been in
        linux-next for more than two weeks and there are no complicated
        cross-subsystem patchsets this time!
      
        Summary:
      
         - at91-reset: add sam9x60 support
      
         - sc27xx: improve capacity logic
      
         - goldfish_battery: enhance driver by adding many new properties
      
         - isp1704: drop platform data and migrate to gpiod
      
         - misc small fixes and improvements"
      
      * tag 'for-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (25 commits)
        power: reset: at91-reset: add support for sam9x60 SoC
        dt-bindings: arm: atmel: add new sam9x60 reset controller binding
        dt-bindings: arm: atmel: add missing samx7 to reset controller
        max17042_battery: fix potential use-after-free on device remove
        power: supply: core: Add a field to support battery max voltage
        dt-bindings: power: supply: Add voltage-max-design-microvolt property
        bq27x00: use cached flags
        power: supply: ds2782: fix possible use-after-free on remove
        power: supply: bq25890: show max charge current/voltage as configured
        power: supply: sc27xx: Fix capacity saving function
        power: supply: sc27xx: Fix the incorrect formula when converting capacity to coulomb counter
        power: supply: sc27xx: Add one property to read charge voltage
        dt-bindings: power: sc27xx: Add one IIO channel to read charge voltage
        drivers: power: supply: goldfish_battery: Add support for reading more properties
        power: supply: charger-manager: Fix trivial language typos
        cpcap-charger: generate events for userspace
        power: supply: remove some duplicated includes
        power: twl4030: fix a missing check of return value
        drivers: power: supply: goldfish_battery: Use tabs for alignment
        drivers: power: supply: goldfish_battery: Fix alignment
        ...
      1cabd3e0
    • Linus Torvalds's avatar
      Merge tag 'hsi-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi · 7427e286
      Linus Torvalds authored
      Pull HIS update from Sebastian Reichel:
       "Replace DEFINE_SIMPLE_ATTRIBUTE with DEFINE_DEBUGFS_ATTRIBUTE"
      
      * tag 'hsi-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi:
        HSI: omap_ssi_port: fix debugfs_simple_attr.cocci warnings
      7427e286
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.1' of git://github.com/cminyard/linux-ipmi · 039cd25f
      Linus Torvalds authored
      Pull IPMI updates from Corey Minyard:
       "A couple of bug fixes and a bunch of code cleanup:
      
         - Fix a use after free error in a certain error situation.
      
         - Fix some flag handling issues in the SSIF (I2C) IPMI driver.
      
         - A bunch of cleanups, spacing issues, converting pr_xxx to dev_xxx,
           use standard UUID handling, and some other minor stuff.
      
         - The IPMI code was creating a platform device if none was supplied.
           Instead of doing that, have every source that creates an IPMI
           device supply a device struct. This fixes several issues,including
           a crash in one situation, and cleans things up a bit"
      
      * tag 'for-linus-5.1' of git://github.com/cminyard/linux-ipmi:
        ipmi_si: Potential array underflow in hotmod_handler()
        ipmi_si: Remove hacks for adding a dummy platform devices
        ipmi_si: Consolidate scanning the platform bus
        ipmi_si: Remove hotmod devices on removal and exit
        ipmi_si: Remove hardcode IPMI devices by scanning the platform bus
        ipmi_si: Switch hotmod to use a platform device
        ipmi: Consolidate the adding of platform devices
        ipmi_si: Rename addr_type to addr_space to match what it does
        ipmi_si: Convert some types into unsigned
        ipmi_si: Fix crash when using hard-coded device
        ipmi: Use dedicated API for copying a UUID
        ipmi: Use defined constant for UUID representation
        ipmi:ssif: Change some pr_xxx to dev_xxx calls
        ipmi: kcs_bmc: handle devm_kasprintf() failure case
        ipmi: Fix return value when a message is truncated
        ipmi: clean an indentation issue, remove extraneous space
        ipmi: Make the smi watcher be disabled immediately when not needed
        ipmi: Fix how the lower layers are told to watch for messages
        ipmi: Fix SSIF flag requests
        ipmi_si: fix use-after-free of resource->name
      039cd25f
    • Linus Torvalds's avatar
      Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e13284da
      Linus Torvalds authored
      Pull RAS updates from Borislav Petkov:
       "This time around we have in store:
      
         - Disable MC4_MISC thresholding banks on all AMD family 0x15 models
           (Shirish S)
      
         - AMD MCE error descriptions update and error decode improvements
           (Yazen Ghannam)
      
         - The usual smaller conversions and fixes"
      
      * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mce: Improve error message when kernel cannot recover, p2
        EDAC/mce_amd: Decode MCA_STATUS in bit definition order
        EDAC/mce_amd: Decode MCA_STATUS[Scrub] bit
        EDAC, mce_amd: Print ExtErrorCode and description on a single line
        EDAC, mce_amd: Match error descriptions to latest documentation
        x86/MCE/AMD, EDAC/mce_amd: Add new error descriptions for some SMCA bank types
        x86/MCE/AMD, EDAC/mce_amd: Add new McaTypes for CS, PSP, and SMU units
        x86/MCE/AMD, EDAC/mce_amd: Add new MP5, NBIO, and PCIE SMCA bank types
        RAS: Add a MAINTAINERS entry
        RAS: Use consistent types for UUIDs
        x86/MCE/AMD: Carve out the MC4_MISC thresholding quirk
        x86/MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models
        x86/MCE: Switch to use the new generic UUID API
      e13284da
    • Linus Torvalds's avatar
      Merge tag 'edac_for_5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp · 1b37b8c4
      Linus Torvalds authored
      Pull EDAC updates from Borislav Petkov:
      
       - A new EDAC AST 2500 SoC driver (Stefan M Schaeckeler)
      
       - New i10nm EDAC driver for Intel 10nm CPUs (Qiuxu Zhuo and Tony Luck)
      
       - Altera SDRAM functionality carveout for separate enablement of RAS
         and SDRAM capabilities on some Altera chips. (Thor Thayer)
      
       - The usual round of cleanups and fixes
      
      And last but not least: recruit James Morse as a reviewer for the ARM
      side.
      
      * tag 'edac_for_5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
        EDAC/altera: Add separate SDRAM EDAC config
        EDAC, altera: Add missing of_node_put()
        EDAC, skx_common: Add code to recognise new compound error code
        EDAC, i10nm: Fix randconfig builds
        EDAC, i10nm: Add a driver for Intel 10nm server processors
        EDAC, skx_edac: Delete duplicated code
        EDAC, skx_common: Separate common code out from skx_edac
        EDAC: Do not check return value of debugfs_create() functions
        EDAC: Add James Morse as a reviewer
        dt-bindings, EDAC: Add Aspeed AST2500
        EDAC, aspeed: Add an Aspeed AST2500 EDAC driver
      1b37b8c4
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid · c6400e5c
      Linus Torvalds authored
      Pull HID updates from Jiri Kosina:
      
       - support for Pro Pen slim, from Jason Gerecke
      
       - power management improvements to Intel-ISH driver, from Song Hongyan
      
       - UCLogic driver revamp in order to be able to support wider range of
         Huion tablets, from Nikolai Kondrashov
      
       - Asus Transbook support, from NOGUCHI Hiroshi
      
       - other assorted small bugfixes / cleanups and device ID additions
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: (46 commits)
        HID: Remove Waltop tablets from hid_have_special_driver
        HID: Remove KYE tablets from hid_have_special_driver
        HID: Remove hid-uclogic entries from hid_have_special_driver
        HID: uclogic: Do not initialize non-USB devices
        HID: uclogic: Add support for Ugee G5
        HID: uclogic: Support Gray-coded rotary encoders
        HID: uclogic: Support faking Wacom pad device ID
        HID: uclogic: Add support for XP-Pen Deco 01
        HID: uclogic: Add support for XP-Pen Star G640
        HID: uclogic: Add support for XP-Pen Star G540
        HID: uclogic: Add support for Ugee EX07S frame controls
        HID: uclogic: Add support for Ugee M540
        HID: uclogic: Add support for Ugee 2150
        HID: uclogic: Support v2 protocol
        HID: uclogic: Support fragmented high-res reports
        HID: uclogic: Support in-range reporting emulation
        HID: uclogic: Designate current protocol v1
        HID: uclogic: Re-initialize tablets on resume
        HID: uclogic: Extract tablet parameter discovery into a module
        HID: uclogic: Extract report descriptors to a module
        ...
      c6400e5c
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching · b7af27bf
      Linus Torvalds authored
      Pull livepatching updates from Jiri Kosina:
      
       - support for something we call 'atomic replace', and allows for much
         better handling of cumulative patches (which is something very useful
         for distros), from Jason Baron with help of Petr Mladek and Joe
         Lawrence
      
       - improvement of handling of tasks blocking finalization, from Miroslav
         Benes
      
       - update of MAINTAINERS file to reflect move towards group
         maintainership
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: (22 commits)
        livepatch/selftests: use "$@" to preserve argument list
        livepatch: Module coming and going callbacks can proceed with all listed patches
        livepatch: Proper error handling in the shadow variables selftest
        livepatch: return -ENOMEM on ptr_id() allocation failure
        livepatch: Introduce klp_for_each_patch macro
        livepatch: core: Return EOPNOTSUPP instead of ENOSYS
        selftests/livepatch: add DYNAMIC_DEBUG config dependency
        livepatch: samples: non static warnings fix
        livepatch: update MAINTAINERS
        livepatch: Remove signal sysfs attribute
        livepatch: Send a fake signal periodically
        selftests/livepatch: introduce tests
        livepatch: Remove ordering (stacking) of the livepatches
        livepatch: Atomic replace and cumulative patches documentation
        livepatch: Remove Nop structures when unused
        livepatch: Add atomic replace
        livepatch: Use lists to manage patches, objects and functions
        livepatch: Simplify API by removing registration step
        livepatch: Don't block the removal of patches loaded after a forced transition
        livepatch: Consolidate klp_free functions
        ...
      b7af27bf
    • Linus Torvalds's avatar
      Merge tag 'drm-next-2019-03-06' of git://anongit.freedesktop.org/drm/drm · 851ca779
      Linus Torvalds authored
      Pull drm updates from Dave Airlie:
       "This is the main drm pull request for the 5.1 merge window.
      
        The big changes I'd highlight are:
         - nouveau has HMM support now, there is finally an in-tree user so we
           can quieten down the rip it out people.
         - i915 now enables fastboot by default on Skylake+
         - Displayport Multistream support has been refactored and should
           hopefully be more reliable.
      
        Core:
         - header cleanups aiming towards removing drmP.h
         - dma-buf fence seqnos to 64-bits
         - common helper for DP mst hotplug for radeon,i915,amdgpu + new
           refcounting scheme
         - MST i2c improvements
         - drm_syncobj_cb removal
         - ARM FB compression fourcc
         - P010 + P016 fourcc
         - allwinner tiled format modifier
         - i2c over aux I2C_M_STOP support
         - DRM_AUTH handling fixes
      
        TTM:
         - ref/unref renaming
      
        New driver:
         - ARM komeda display driver
      
        scheduler:
         - refactor mirror list handling
         - rework hw fence processing
         - 0 run queue entity fix
      
        bridge:
         - TI DS90C185 LVDS bridge
         - thc631lvdm83d bridge improvements
         - cadence + allwinner DSI ported to generic phy
      
        panels:
         - Sitronix ST7701 panel
         - Kingdisplay KD097D04
         - LeMaker BL035-RGB-002
         - PDA 91-00156-A0
         - Innolux EE101IA-01D
      
        i915:
         - Enable fastboot by default on SKL+/VLV/CHV
         - Export RPCS configuration for ICL media driver
         - Coffelake PCI ID
         - CNL clocks setup fixes
         - ACPI/PMIC support for MIPI/DSI
         - Per-engine WA init for all engines
         - Shrinker locking fixes
         - Kerneldoc updates
         - Lots of ring improvements and reset fixes
         - Coffeelake GVT Support
         - VFIO GVT EDID Region support
         - runtime PM wakeref tracking
         - ILK->IVB primary plane enable delays
         - userptr mutex locking fixes
         - DSI fixes
         - LVDS/TV cleanups
         - HW readout fixes
         - LUT robustness fixes
         - ICL display and watermark fixes
         - gem mmap race fix
      
        amdgpu:
         - add scheduled dependencies interface
         - DCC on scanout surfaces
         - vega10/20 BACO support
         - Multiple IH rings on soc15
         - XGMI locking fixes
         - DC i2c/aux cleanups
         - runtime SMU debug interface
         - Kexec improvmeents
         - SR-IOV fixes
         - DC freesync + ABM fixes
         - GDS fixes
         - GPUVM fixes
         - vega20 PCIE DPM switching fixes
         - Context priority handling fixes
      
        radeon:
         - fix missing break in evergreen parser
      
        nouveau:
         - SVM support via HMM
      
        msm:
         - QCOM Compressed modifier support
      
        exynos:
         - s5pv210 rotator support
      
        imx:
         - zpos property support
         - pending update fixes
      
        v3d:
         - cache flush improvments
      
        vc4:
         - reflection support
         - HDMI overscan support
      
        tegra:
         - CEC refactoring
         - HDMI audio fixes
         - Tegra186 prep work
         - SOR crossbar device tree fixes
      
        sun4i:
         - implicit fencing support
         - YUV and scalar support improvements
         - A23 support
         - tiling fixes
      
        atmel-hlcdc:
         - clipping and rotation property fixes
      
        qxl:
         - BO and PRIME improvements
         - generic fbdev emulation
      
        dw-hdmi:
         - HDMI 2.0 2160p
         - YUV420 ouput
      
        rockchip:
         - implicit fencing support
         - reflection proerties
      
        virtio-gpu:
         - use generic fbdev emulation
      
        tilcdc:
         - cpufreq vs crtc init fix
      
        rcar-du:
         - R8A774C0 support
         - D3/E3 RGB output routing fixes and DPAD0 support
         - RA87744 LVDS support
      
        bochs:
         - atomic and generic fbdev emulation
         - ID mismatch error on bochs load
      
        meson:
         - remove firmware fbs"
      
      * tag 'drm-next-2019-03-06' of git://anongit.freedesktop.org/drm/drm: (1130 commits)
        drm/amd/display: Use vrr friendly pageflip throttling in DC.
        drm/imx: only send commit done event when all state has been applied
        drm/imx: allow building under COMPILE_TEST
        drm/imx: imx-tve: depend on COMMON_CLK
        drm/imx: ipuv3-plane: add zpos property
        drm/imx: ipuv3-plane: add function to query atomic update status
        gpu: ipu-v3: prg: add function to get channel configure status
        gpu: ipu-v3: pre: add double buffer status readback
        drm/amdgpu: Bump amdgpu version for context priority override.
        drm/amdgpu/powerplay: fix typo in BACO header guards
        drm/amdgpu/powerplay: fix return codes in BACO code
        drm/amdgpu: add missing license on baco files
        drm/bochs: Fix the ID mismatch error
        drm/nouveau/dmem: use dma addresses during migration copies
        drm/nouveau/dmem: use physical vram addresses during migration copies
        drm/nouveau/dmem: extend copy function to allow direct use of physical addresses
        drm/nouveau/svm: new ioctl to migrate process memory to GPU memory
        drm/nouveau/dmem: device memory helpers for SVM
        drm/nouveau/svm: initial support for shared virtual memory
        drm/nouveau: prepare for enabling svm with existing userspace interfaces
        ...
      851ca779
    • Russell King's avatar
      gpio: gpio-omap: fix level interrupt idling · d01849f7
      Russell King authored
      Tony notes that the GPIO module does not idle when level interrupts are
      in use, as the wakeup appears to get stuck.
      
      After extensive investigation, it appears that the wakeup will only be
      cleared if the interrupt status register is cleared while the interrupt
      is enabled. However, we are currently clearing it with the interrupt
      disabled for level-based interrupts.
      
      It is acknowledged that this observed behaviour conflicts with a
      statement in the TRM:
      
      CAUTION
        After servicing the interrupt, the status bit in the interrupt status
        register (GPIOi.GPIO_IRQSTATUS_0 or GPIOi.GPIO_IRQSTATUS_1) must be
        reset and the interrupt line released (by setting the corresponding
        bit of the interrupt status register to 1) before enabling an
        interrupt for the GPIO channel in the interrupt-enable register
        (GPIOi.GPIO_IRQSTATUS_SET_0 or GPIOi.GPIO_IRQSTATUS_SET_1) to prevent
        the occurrence of unexpected interrupts when enabling an interrupt
        for the GPIO channel.
      
      However, this does not appear to be a practical problem.
      
      Further, as reported by Grygorii Strashko <grygorii.strashko@ti.com>,
      the TI Android kernel tree has an earlier similar patch as "GPIO: OMAP:
      Fix the sequence to clear the IRQ status" saying:
      
       if the status is cleared after disabling the IRQ then sWAKEUP will not
       be cleared and gates the module transition
      
      When we unmask the level interrupt after the interrupt has been handled,
      enable the interrupt and only then clear the interrupt. If the interrupt
      is still pending, the hardware will re-assert the interrupt status.
      
      Should the caution note in the TRM prove to be a problem, we could
      use a clear-enable-clear sequence instead.
      
      Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
      Cc: Keerthy <j-keerthy@ti.com>
      Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      [tony@atomide.com: updated comments based on an earlier TI patch]
      Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
      Acked-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      d01849f7
    • Axel Lin's avatar
      gpio: amd-fch: Set proper output level for direction_output · f777cda3
      Axel Lin authored
      Current amd_fch_gpio_direction_output implementation ignores the value
      argument, fix it so direction_output will set proper output level.
      Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
      Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
      Reviewed-by: default avatarEnrico Weigelt <info@metux.net>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      f777cda3
    • Arnd Bergmann's avatar
      x86: apuv2: remove unused variable · deb63b0b
      Arnd Bergmann authored
      The driver was newly introduced but the version that got merged
      produces a harmless compiler warning:
      
      drivers/platform/x86/pcengines-apuv2.c: In function 'apu_board_init':
      drivers/platform/x86/pcengines-apuv2.c:211:6: error: unused variable 'rc' [-Werror=unused-variable]
      
      Remove the evidently useless variable.
      
      Fixes: f8eb0235 ("x86: pcengines apuv2 gpio/leds/keys platform driver")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Reviewed-By: default avatarEnrico Weigelt, metux IT consult <info@metux.net>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      deb63b0b