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2020-12-02gpio: mvebu: switch pwm duration registers to regmapBaruch Siach
Commit 2233bf7a92e ("gpio: mvebu: switch to regmap for register access") changed most readl/writel registers access calls to the regmap API in preparation for Armada 7K/8K support. PWM duration registers were left using readl/writel, as the driver does not support PWM for Armada 7K/8K. Switch PWM duration registers to regmap as first step in adding Armada 7K/8K PWM functionality support. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-12-02gpio: mvebu: update Armada XP per-CPU commentBaruch Siach
Commit 2233bf7a92e ("gpio: mvebu: switch to regmap for register access") introduced percpu_regs to replace percpu_membase. Update the comment to match. Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Fixes: 2233bf7a92e7 ("gpio: mvebu: switch to regmap for register access") Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-12-01gpiolib: do not print err message for EPROBE_DEFERGrygorii Strashko
The gpiochip may have dependencies from pinmux and so got deferred. Now it will print error message every time -EPROBE_DEFER is returned which is unnecessary: "gpiochip_add_data_with_key: GPIOs 0..31 (gpio-0-31) failed to register, -517" Hence, do suppress error message for -EPROBE_DEFER case. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-12-01gpio: ath79: Fix fall-through warning for ClangGustavo A. R. Silva
In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning by explicitly adding a fallthrough pseudo-keyword to indicate that the code is intended to fall through to the next case. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-12-01gpiolib: acpi: Fix fall-through warnings for ClangGustavo A. R. Silva
In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning by explicitly adding a break statement instead of letting the code fall through to the next case. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-30gpio: omap: handle deferred probe with dev_err_probe() for gpiochip_add_data()Grygorii Strashko
The gpiochip_add_data() may return -EPROBE_DEFER which is not handled properly by TI GPIO driver and causes unnecessary boot log messages. Hence, add proper deferred probe handling with new dev_err_probe() API. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-30gpio: xra1403: remove unneeded spi_set_drvdata()Alexandru Ardelean
There is no matching spi_get_drvdata() call in the driver, so there is no need to do spi_set_drvdata(). This looks like it probably was copied from a driver that used both spi_set_drvdata() & spi_get_drvdata(). Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-30gpio: dwapb: Remove unnecessary error messageDamien Le Moal
In dwapb_get_reset(), if devm_reset_control_get_optional_shared() fails, an error message is printed even if the failure is the benign EPROBE_DEFER error due to the reset controller not yet being initialized. Use dev_err_probe() to handle devm_reset_control_get_optional_shared() errors to avoid unnecessarilly printing an error message for the deferred probe error. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-25gpio: exar: use devm action for freeing the IDA and drop remove()Bartosz Golaszewski
We can simplify the error path in probe() and drop remove() entirely if we provide a devm action for freeing the device ID. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-25gpio: exar: switch to using regmapBartosz Golaszewski
We can simplify the code in gpio-exar by using regmap. This allows us to drop the mutex (regmap provides its own locking) and we can also reuse regmap's bit operations instead of implementing our own update function. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-25gpio: exar: unduplicate address and offset computationBartosz Golaszewski
Provide and use helpers for calculating the register address and bit offset instead of hand coding it in every function. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-25gpio: exar: use a helper variable for &pdev->devBartosz Golaszewski
It's more elegant to use a helper local variable to store the address of the underlying struct device than to dereference pdev everywhere. It also has the benefit of avoiding unnecessary line breaks. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-25gpio: exar: switch to a simpler IDA interfaceBartosz Golaszewski
We don't need to specify any ranges when allocating IDs so we can switch to ida_alloc() and ida_free() instead of the ida_simple_ counterparts. ida_simple_get(ida, 0, 0, gfp) is equivalent to ida_alloc_range(ida, 0, UINT_MAX, gfp) which is equivalent to ida_alloc(ida, gfp). Note: IDR will never actually allocate an ID larger than INT_MAX. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-25gpio: exar: include idr.hBartosz Golaszewski
This driver uses IDA APIs but doesn't include the relevant header. This fixes it. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-25gpio: exar: add a newline after the copyright noticeBartosz Golaszewski
It's customary to have a newline between the copyright header and the includes. Add one to gpio-exar. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-11-18gpio: sifive: To get gpio irq offset from device tree dataGreentime Hu
We can get hwirq number of the gpio by its irq_data->hwirq so that we don't need to add more macros for different platforms. This patch is tested in SiFive Unleashed board and SiFive Unmatched board. Signed-off-by: Greentime Hu <greentime.hu@sifive.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-16gpiolib: devres: shrink devm_gpiochip_add_data_with_key()Bartosz Golaszewski
If all we want to manage is a single pointer, there's no need to manually allocate and add a new devres. We can simply use devm_add_action_or_reset() and shrink the code by a good bit. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2020-11-06gpio: tegra: Use raw_spinlockDmitry Osipenko
Use raw_spinlock in order to fix spurious messages about invalid context when spinlock debugging is enabled. This happens because there is a legit nested raw_spinlock->spinlock locking usage within IRQ-related code. IRQ core uses raw spinlock and then Tegra GPIO driver uses a nested spinlock. The debug code can't recognize and handle this case, hence we need to use raw spinlock in the GPIO driver. [ BUG: Invalid wait context ] ... (dump_stack) from (__lock_acquire) (__lock_acquire) from (lock_acquire) (lock_acquire) from (_raw_spin_lock_irqsave) (_raw_spin_lock_irqsave) from (tegra_gpio_irq_set_type) (tegra_gpio_irq_set_type) from (__irq_set_trigger) (__irq_set_trigger) from (__setup_irq) (__setup_irq) from (request_threaded_irq) (request_threaded_irq) from (devm_request_threaded_irq) (devm_request_threaded_irq) from (elants_i2c_probe) (elants_i2c_probe) from (i2c_device_probe) ... Tested-by: Peter Geis <pgwipeout@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-06gpio: tegra: Add lockdep classDmitry Osipenko
Add lockdep class in order to fix debug warnings that are coming from a legit nested use of irq_set_irq_wake() by the Tegra GPIO driver. WARNING: possible recursive locking detected ... (irq_set_irq_wake) from (tegra_gpio_irq_set_wake) (tegra_gpio_irq_set_wake) from (irq_set_irq_wake) (irq_set_irq_wake) from (brcmf_sdiod_intr_register [brcmfmac]) ... Tested-by: Peter Geis <pgwipeout@gmail.com> Reported-by: Peter Geis <pgwipeout@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30gpio: rcar: Implement gpio_chip.get_multiple()Geert Uytterhoeven
Add support for getting the state of multiple pins using a minimum of register reads. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30gpio: rcar: Rework hardware features handlingGeert Uytterhoeven
Reuse gpio_rcar_info inside gpio_rcar_priv instead of duplicating the individual members, so gpio_rcar_parse_dt() can copy them in one go. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30gpio: rcar: Align register offsetsGeert Uytterhoeven
Improve readability by aligning the offsets in the register definitions. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30gpio: rcar: Cache gpiochip_get_data() return valueGeert Uytterhoeven
Since commit 43c54ecade400cf6 ("gpio: move the subdriver data pointer into gpio_device") changed gpiochip_get_data() to an out-of-line function, it is now worthwhile to avoid multiple calls in a row by caching its return value in a local variable. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30gpiolib: cdev: add GPIO_V2_LINE_FLAG_EDGE_BOTH and use it in edge_irq_thread()Kent Gibson
Add GPIO_V2_LINE_FLAG_EDGE_BOTH macro and use it in edge_irq_thread() to improve readability of edge handling cases. Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Kent Gibson <warthog618@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-29gpio: mockup: Allow probing from device treeVincent Whitchurch
Allow the mockup driver to be probed via the device tree without any module parameters, allowing it to be used to configure and test higher level drivers like the leds-gpio driver and corresponding userspace before actual hardware is available. Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-27dt-bindings: gpio: pca953x: Add support for the NXP PCAL9554B/CMike Looijmans
The NXP PCAL9554B is a variant of the PCA953x GPIO expander, with 8 GPIOs, latched interrupts and some advanced configuration options. The "C" version only differs in I2C address. This adds the entry to the devicetree bindings. Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26gpiolib: split error path in gpiod_request_commit()Andy Shevchenko
For better maintenance and micro optimization split error path in the gpiod_request_commit(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26gpiolib: Unify expectations about ->request() returned valueAndy Shevchenko
Half of the code in the GPIO library is written in an expectation that any non-zero value returned from the ->request() callback is an error code, while some code checks only for negative values. Unify expectations about ->request() returned value to be non-zero for an error and 0 for the success. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26gpiolib: of: Use named item for enum gpiod_flags variableAndy Shevchenko
Use named item instead of plain integer for enum gpiod_flags to make it clear that even 0 has its own meaning. Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26gpiolib: cdev: document that line eflags are sharedKent Gibson
The line.eflags field is shared so document this fact and highlight it throughout using READ_ONCE() and WRITE_ONCE() accessors. Also use a local copy of the eflags in edge_irq_thread() to ensure consistent control flow even if eflags changes. This is only a defensive measure as edge_irq_thread() is currently disabled when the eflags are changed. Signed-off-by: Kent Gibson <warthog618@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26gpiolib: Extract gpiod_not_found() helperAndy Shevchenko
Several places in the code are using same idiom, i.e. IS_ERR(desc) && PTR_ERR(desc) == -ENOENT which meaning is GPIO description is not found. For better readability extract gpiod_not_found() helper and use it. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-25Linux 5.10-rc1v5.10-rc1Linus Torvalds
2020-10-25treewide: Convert macro and uses of __section(foo) to __section("foo")Joe Perches
Use a more generic form for __section that requires quotes to avoid complications with clang and gcc differences. Remove the quote operator # from compiler_attributes.h __section macro. Convert all unquoted __section(foo) uses to quoted __section("foo"). Also convert __attribute__((section("foo"))) uses to __section("foo") even if the __attribute__ has multiple list entry forms. Conversion done using the script at: https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl Signed-off-by: Joe Perches <joe@perches.com> Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-25kernel/sys.c: fix prototype of prctl_get_tid_address()Rasmus Villemoes
tid_addr is not a "pointer to (pointer to int in userspace)"; it is in fact a "pointer to (pointer to int in userspace) in userspace". So sparse rightfully complains about passing a kernel pointer to put_user(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-25mm: remove kzfree() compatibility definitionEric Biggers
Commit 453431a54934 ("mm, treewide: rename kzfree() to kfree_sensitive()") renamed kzfree() to kfree_sensitive(), but it left a compatibility definition of kzfree() to avoid being too disruptive. Since then a few more instances of kzfree() have slipped in. Just get rid of them and remove the compatibility definition once and for all. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-25checkpatch: enable GIT_DIR environment use to set git repository locationJoe Perches
If set, use the environment variable GIT_DIR to change the default .git location of the kernel git tree. If GIT_DIR is unset, keep using the current ".git" default. Link: https://lkml.kernel.org/r/c5e23b45562373d632fccb8bc04e563abba4dd1d.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-25Merge tag 'timers-urgent-2020-10-25' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Thomas Gleixner: "A time namespace fix and a matching selftest. The futex absolute timeouts which are based on CLOCK_MONOTONIC require time namespace corrected. This was missed in the original time namesapce support" * tag 'timers-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: selftests/timens: Add a test for futex() futex: Adjust absolute futex timeouts with per time namespace offset
2020-10-25Merge tag 'sched-urgent-2020-10-25' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Thomas Gleixner: "Two scheduler fixes: - A trivial build fix for sched_feat() to compile correctly with CONFIG_JUMP_LABEL=n - Replace a zero lenght array with a flexible array" * tag 'sched-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/features: Fix !CONFIG_JUMP_LABEL case sched: Replace zero-length array with flexible-array
2020-10-25Merge tag 'perf-urgent-2020-10-25' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fix from Thomas Gleixner: "A single fix to compute the field offset of the SNOOPX bit in the data source bitmask of perf events correctly" * tag 'perf-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: correct SNOOPX field offset
2020-10-25Merge tag 'locking-urgent-2020-10-25' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fix from Thomas Gleixner: "Just a trivial fix for kernel-doc warnings" * tag 'locking-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/seqlocks: Fix kernel-doc warnings
2020-10-25Merge tag 'ntb-5.10' of git://github.com/jonmason/ntbLinus Torvalds
Pull NTB fixes from Jon Mason. * tag 'ntb-5.10' of git://github.com/jonmason/ntb: NTB: Use struct_size() helper in devm_kzalloc() ntb: intel: Fix memleak in intel_ntb_pci_probe NTB: hw: amd: fix an issue about leak system resources
2020-10-25Merge branch 'i2c/for-5.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fix from Wolfram Sang: "Regression fix for rc1 and stable kernels as well" * 'i2c/for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: core: Restore acpi_walk_dep_device_list() getting called after registering the ACPI i2c devs
2020-10-25Merge tag '5.10-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull more cifs updates from Steve French: "Add support for stat of various special file types (WSL reparse points for char, block, fifo)" * tag '5.10-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: cifs: update internal module version number smb3: add some missing definitions from MS-FSCC smb3: remove two unused variables smb3: add support for stat of WSL reparse points for special file types
2020-10-25Merge branch 'parisc-5.10-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull more parisc updates from Helge Deller: - During this merge window O_NONBLOCK was changed to become 000200000, but we missed that the syscalls timerfd_create(), signalfd4(), eventfd2(), pipe2(), inotify_init1() and userfaultfd() do a strict bit-wise check of the flags parameter. To provide backward compatibility with existing userspace we introduce parisc specific wrappers for those syscalls which filter out the old O_NONBLOCK value and replaces it with the new one. - Prevent HIL bus driver to get stuck when keyboard or mouse isn't attached - Improve error return codes when setting rtc time - Minor documentation fix in pata_ns87415.c * 'parisc-5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: ata: pata_ns87415.c: Document support on parisc with superio chip parisc: Add wrapper syscalls to fix O_NONBLOCK flag usage hil/parisc: Disable HIL driver when it gets stuck parisc: Improve error return codes when setting rtc time
2020-10-25Merge tag 'for-linus-5.10b-rc1c-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull more xen updates from Juergen Gross: - a series for the Xen pv block drivers adding module parameters for better control of resource usge - a cleanup series for the Xen event driver * tag 'for-linus-5.10b-rc1c-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: Documentation: add xen.fifo_events kernel parameter description xen/events: unmask a fifo event channel only if it was masked xen/events: only register debug interrupt for 2-level events xen/events: make struct irq_info private to events_base.c xen: remove no longer used functions xen-blkfront: Apply changed parameter name to the document xen-blkfront: add a parameter for disabling of persistent grants xen-blkback: add a parameter for disabling of persistent grants
2020-10-25Merge tag 'safesetid-5.10' of git://github.com/micah-morton/linuxLinus Torvalds
Pull SafeSetID updates from Micah Morton: "The changes are mostly contained to within the SafeSetID LSM, with the exception of a few 1-line changes to change some ns_capable() calls to ns_capable_setid() -- causing a flag (CAP_OPT_INSETID) to be set that is examined by SafeSetID code and nothing else in the kernel. The changes to SafeSetID internally allow for setting up GID transition security policies, as already existed for UIDs" * tag 'safesetid-5.10' of git://github.com/micah-morton/linux: LSM: SafeSetID: Fix warnings reported by test bot LSM: SafeSetID: Add GID security policy handling LSM: Signal to SafeSetID when setting group IDs
2020-10-25Merge tag '20201024-v4-5.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom Pull random32 updates from Willy Tarreau: "Make prandom_u32() less predictable. This is the cleanup of the latest series of prandom_u32 experimentations consisting in using SipHash instead of Tausworthe to produce the randoms used by the network stack. The changes to the files were kept minimal, and the controversial commit that used to take noise from the fast_pool (f227e3ec3b5c) was reverted. Instead, a dedicated "net_rand_noise" per_cpu variable is fed from various sources of activities (networking, scheduling) to perturb the SipHash state using fast, non-trivially predictable data, instead of keeping it fully deterministic. The goal is essentially to make any occasional memory leakage or brute-force attempt useless. The resulting code was verified to be very slightly faster on x86_64 than what is was with the controversial commit above, though this remains barely above measurement noise. It was also tested on i386 and arm, and build- tested only on arm64" Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/ * tag '20201024-v4-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom: random32: add a selftest for the prandom32 code random32: add noise from network and scheduling activity random32: make prandom_u32() output unpredictable
2020-10-25i2c: core: Restore acpi_walk_dep_device_list() getting called after ↵Hans de Goede
registering the ACPI i2c devs Commit 21653a4181ff ("i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()")'s intention was to only move the acpi_install_address_space_handler() call to the point before where the ACPI declared i2c-children of the adapter where instantiated by i2c_acpi_register_devices(). But i2c_acpi_install_space_handler() had a call to acpi_walk_dep_device_list() hidden (that is I missed it) at the end of it, so as an unwanted side-effect now acpi_walk_dep_device_list() was also being called before i2c_acpi_register_devices(). Move the acpi_walk_dep_device_list() call to the end of i2c_acpi_register_devices(), so that it is once again called *after* the i2c_client-s hanging of the adapter have been created. This fixes the Microsoft Surface Go 2 hanging at boot. Fixes: 21653a4181ff ("i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()") Link: https://bugzilla.kernel.org/show_bug.cgi?id=209627 Reported-by: Rainer Finke <rainer@finke.cc> Reported-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Suggested-by: Maximilian Luz <luzmaximilian@gmail.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-24Merge tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: - NVMe pull request from Christoph - rdma error handling fixes (Chao Leng) - fc error handling and reconnect fixes (James Smart) - fix the qid displace when tracing ioctl command (Keith Busch) - don't use BLK_MQ_REQ_NOWAIT for passthru (Chaitanya Kulkarni) - fix MTDT for passthru (Logan Gunthorpe) - blacklist Write Same on more devices (Kai-Heng Feng) - fix an uninitialized work struct (zhenwei pi)" - lightnvm out-of-bounds fix (Colin) - SG allocation leak fix (Doug) - rnbd fixes (Gioh, Guoqing, Jack) - zone error translation fixes (Keith) - kerneldoc markup fix (Mauro) - zram lockdep fix (Peter) - Kill unused io_context members (Yufen) - NUMA memory allocation cleanup (Xianting) - NBD config wakeup fix (Xiubo) * tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-block: (27 commits) block: blk-mq: fix a kernel-doc markup nvme-fc: shorten reconnect delay if possible for FC nvme-fc: wait for queues to freeze before calling update_hr_hw_queues nvme-fc: fix error loop in create_hw_io_queues nvme-fc: fix io timeout to abort I/O null_blk: use zone status for max active/open nvmet: don't use BLK_MQ_REQ_NOWAIT for passthru nvmet: cleanup nvmet_passthru_map_sg() nvmet: limit passthru MTDS by BIO_MAX_PAGES nvmet: fix uninitialized work for zero kato nvme-pci: disable Write Zeroes on Sandisk Skyhawk nvme: use queuedata for nvme_req_qid nvme-rdma: fix crash due to incorrect cqe nvme-rdma: fix crash when connect rejected block: remove unused members for io_context blk-mq: remove the calling of local_memory_node() zram: Fix __zram_bvec_{read,write}() locking order skd_main: remove unused including <linux/version.h> sgl_alloc_order: fix memory leak lightnvm: fix out-of-bounds write to array devices->info[] ...
2020-10-24Merge tag 'io_uring-5.10-2020-10-24' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull io_uring fixes from Jens Axboe: - fsize was missed in previous unification of work flags - Few fixes cleaning up the flags unification creds cases (Pavel) - Fix NUMA affinities for completely unplugged/replugged node for io-wq - Two fallout fixes from the set_fs changes. One local to io_uring, one for the splice entry point that io_uring uses. - Linked timeout fixes (Pavel) - Removal of ->flush() ->files work-around that we don't need anymore with referenced files (Pavel) - Various cleanups (Pavel) * tag 'io_uring-5.10-2020-10-24' of git://git.kernel.dk/linux-block: splice: change exported internal do_splice() helper to take kernel offset io_uring: make loop_rw_iter() use original user supplied pointers io_uring: remove req cancel in ->flush() io-wq: re-set NUMA node affinities if CPUs come online io_uring: don't reuse linked_timeout io_uring: unify fsize with def->work_flags io_uring: fix racy REQ_F_LINK_TIMEOUT clearing io_uring: do poll's hash_node init in common code io_uring: inline io_poll_task_handler() io_uring: remove extra ->file check in poll prep io_uring: make cached_cq_overflow non atomic_t io_uring: inline io_fail_links() io_uring: kill ref get/drop in personality init io_uring: flags-based creds init in queue
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