Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=master 2026-04-18T16:44:22+00:00 2026-04-18T16:44:22+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-04-18T16:44:22+00:00 urn:sha1:fba676bd2919ceff5a678c0bd05ab3ac89affaeb Pull i2c updates from Wolfram Sang: "The biggest news in this pull request is that it will start the last cycle of me handling the I2C subsystem. From 7.2. on, I will pass maintainership to Andi Shyti who has been maintaining the I2C drivers for a while now and who has done a great job in doing so. We will use this cycle for a hopefully smooth transition. Thanks must go to Andi for stepping up! I will still be around for guidance. Updates: - generic cleanups in npcm7xx, qcom-cci, xiic and designware DT bindings - atr: use kzalloc_flex for alias pool allocation - ixp4xx: convert bindings to DT schema - ocores: use read_poll_timeout_atomic() for polling waits - qcom-geni: skip extra TX DMA TRE for single read messages - s3c24xx: validate SMBus block length before using it - spacemit: refactor xfer path and add K1 PIO support - tegra: identify DVC and VI with SoC data variants - tegra: support SoC-specific register offsets - xiic: switch to devres and generic fw properties - xiic: skip input clock setup on non-OF systems - various minor improvements in other drivers rtl9300: - add per-SoC callbacks and clock support for RTL9607C - add support for new 50 kHz and 2.5 MHz bus speeds - general refactoring in preparation for RTL9607C support New support: - DesignWare GOOG5000 (ACPI HID) - Intel Nova Lake (ACPI ID) - Realtek RTL9607C - SpacemiT K3 binding - Tegra410 register layout support" * tag 'i2c-for-7.1-rc1-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (40 commits) i2c: usbio: Add ACPI device-id for NVL platforms i2c: qcom-geni: Avoid extra TX DMA TRE for single read message in GPI mode i2c: atr: use kzalloc_flex i2c: spacemit: introduce pio for k1 i2c: spacemit: move i2c_xfer_msg() i2c: xiic: skip input clock setup on non-OF systems i2c: xiic: use numbered adapter registration i2c: xiic: cosmetic: use resource format specifier in debug log i2c: xiic: cosmetic cleanup i2c: xiic: switch to generic device property accessors i2c: xiic: remove duplicate error message i2c: xiic: switch to devres managed APIs i2c: rtl9300: add RTL9607C i2c controller support i2c: rtl9300: introduce new function properties to driver data i2c: rtl9300: introduce clk struct for upcoming rtl9607 support dt-bindings: i2c: realtek,rtl9301-i2c: extend for clocks and RTL9607C support i2c: rtl9300: introduce a property for 8 bit width reg address i2c: rtl9300: introduce F_BUSY to the reg_fields struct i2c: rtl9300: introduce max length property to driver data i2c: rtl9300: split data_reg into read and write reg ... 2026-04-17T16:43:12+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-04-17T16:43:12+00:00 urn:sha1:cb30bf881c5b4ee8b879558a2fce93d7de652955 Pull tracing updates from Steven Rostedt: - Fix printf format warning for bprintf sunrpc uses a trace_printk() that triggers a printf warning during the compile. Move the __printf() attribute around for when debugging is not enabled the warning will go away - Remove redundant check for EVENT_FILE_FL_FREED in event_filter_write() The FREED flag is checked in the call to event_file_file() and then checked again right afterward, which is unneeded - Clean up event_file_file() and event_file_data() helpers These helper functions played a different role in the past, but now with eventfs, the READ_ONCE() isn't needed. Simplify the code a bit and also add a warning to event_file_data() if the file or its data is not present - Remove updating file->private_data in tracing open All access to the file private data is handled by the helper functions, which do not use file->private_data. Stop updating it on open - Show ENUM names in function arguments via BTF in function tracing When showing the function arguments when func-args option is set for function tracing, if one of the arguments is found to be an enum, show the name of the enum instead of its number - Add new trace_call__##name() API for tracepoints Tracepoints are enabled via static_branch() blocks, where when not enabled, there's only a nop that is in the code where the execution will just skip over it. When tracing is enabled, the nop is converted to a direct jump to the tracepoint code. Sometimes more calculations are required to be performed to update the parameters of the tracepoint. In this case, trace_##name##_enabled() is called which is a static_branch() that gets enabled only when the tracepoint is enabled. This allows the extra calculations to also be skipped by the nop: if (trace_foo_enabled()) { x = bar(); trace_foo(x); } Where the x=bar() is only performed when foo is enabled. The problem with this approach is that there's now two static_branch() calls. One for checking if the tracepoint is enabled, and then again to know if the tracepoint should be called. The second one is redundant Introduce trace_call__foo() that will call the foo() tracepoint directly without doing a static_branch(): if (trace_foo_enabled()) { x = bar(); trace_call__foo(); } - Update various locations to use the new trace_call__##name() API - Move snapshot code out of trace.c Cleaning up trace.c to not be a "dump all", move the snapshot code out of it and into a new trace_snapshot.c file - Clean up some "%*.s" to "%*s" - Allow boot kernel command line options to be called multiple times Have options like: ftrace_filter=foo ftrace_filter=bar ftrace_filter=zoo Equal to: ftrace_filter=foo,bar,zoo - Fix ipi_raise event CPU field to be a CPU field The ipi_raise target_cpus field is defined as a __bitmask(). There is now a __cpumask() field definition. Update the field to use that - Have hist_field_name() use a snprintf() and not a series of strcat() It's safer to use snprintf() that a series of strcat() - Fix tracepoint regfunc balancing A tracepoint can define a "reg" and "unreg" function that gets called before the tracepoint is enabled, and after it is disabled respectively. But on error, after the "reg" func is called and the tracepoint is not enabled, the "unreg" function is not called to tear down what the "reg" function performed - Fix output that shows what histograms are enabled Event variables are displayed incorrectly in the histogram output Instead of "sched.sched_wakeup.$var", it is showing "$sched.sched_wakeup.var" where the '$' is in the incorrect location - Some other simple cleanups * tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (24 commits) selftests/ftrace: Add test case for fully-qualified variable references tracing: Fix fully-qualified variable reference printing in histograms tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func() tracing: Rebuild full_name on each hist_field_name() call tracing: Report ipi_raise target CPUs as cpumask tracing: Remove duplicate latency_fsnotify() stub tracing: Preserve repeated trace_trigger boot parameters tracing: Append repeated boot-time tracing parameters tracing: Remove spurious default precision from show_event_trigger/filter formats cpufreq: Use trace_call__##name() at guarded tracepoint call sites tracing: Remove tracing_alloc_snapshot() when snapshot isn't defined tracing: Move snapshot code out of trace.c and into trace_snapshot.c mm: damon: Use trace_call__##name() at guarded tracepoint call sites btrfs: Use trace_call__##name() at guarded tracepoint call sites spi: Use trace_call__##name() at guarded tracepoint call sites i2c: Use trace_call__##name() at guarded tracepoint call sites kernel: Use trace_call__##name() at guarded tracepoint call sites tracepoint: Add trace_call__##name() API tracing: trace_mmap.h: fix a kernel-doc warning tracing: Pretty-print enum parameters in function arguments ... 2026-04-15T21:15:25+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-04-15T21:15:25+00:00 urn:sha1:4ddd4f0651a710f33dfbb9dadd94f2bb0aa31aa8 Pull MMC updates from Ulf Hansson: "MMC core: - Add NXP vendor and IW61x device IDs for WiFi chips over SDIO - Add quirk for incorrect manufacturing date - Add support for manufacturing date beyond 2025 - Optimize support for secure erase/trim for some Kingston eMMCs - Remove support for the legacy "enable-sdio-wakeup" DT property - Use single block writes in the retry path MMC host: - dw_mmc: - A great amount of cleanups/simplifications to improve the code - Add clk_phase_map support - Remove mshc DT alias support - dw_mmc-rockchip: - Fix runtime PM support for internal phase - Add support for the RV1103B variant - loongson2: - Add support for the Loongson-2K0300 SD/SDIO/eMMC controller - mtk-sd: - Add support for the MT8189 variant - renesas_sdhi_core: - Add support for selecting an optional mux - rtsx_pci_sdmmc: - Simplify voltage switch handling - sdhci: - Stop advertising the driver in dmesg - sdhci-esdhc-imx: - Add 1-bit bus width support - Add support for the NXP S32N79 variant - sdhci-msm: - Add support for the IPQ5210 and IPQ9650 variants - Add support for wrapped keys - Enable ICE for CQE-capable controllers with non-CQE cards - sdhci-of-arasan: - Add support for the Axiado AX3000 variant - sdhci-of-aspeed: - Add support for the AST2700 variant - sdhci-of-bst: - Add driver for the Black Sesame Technologies C1200 controller - sdhci-of-dwcmshc: - Add support for the Canaan K230 variant - Add support for the HPE GSC variant - Prevent clock glitches to avoid malfunction - sdhci-of-k1: - Add support for the K3 variant mux core/consumers: - core: - Add helper functions for getting optional and selected mux-state - i2c-omap: - Convert to devm_mux_state_get_optional_selected() - phy-renesas: - Convert to devm_mux_state_get_optional_selected() - phy-can-transceiver: - Convert to devm_mux_state_get_optional()" * tag 'mmc-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (131 commits) mmc: sdhci-msm: Fix the wrapped key handling mmc: sdhci-of-dwcmshc: Disable clock before DLL configuration mmc: core: Simplify with scoped for each OF child loop mmc: core: Optimize size of struct mmc_queue_req mmc: vub300: clean up module init mmc: vub300: rename probe error labels mmc: dw_mmc: Remove dw_mci_start_request wrapper and rename core function mmc: dw_mmc: Inline dw_mci_queue_request() into dw_mci_request() mmc: block: Use MQRQ_XFER_SINGLE_BLOCK for both read and write recovery mmc: mmc_test: Replace hard-coded values with macros and consolidate test parameters mmc: block: Convert to use DEFINE_SIMPLE_DEV_PM_OPS() mmc: core: Replace the hard-coded shift value 9 with SECTOR_SHIFT mmc: sdhci-dwcmshc: Refactor Rockchip platform data for controller revisions mmc: core: Switch to use pm_ptr() for mmc_host_class_dev_pm_ops mmc: core: Remove legacy 'enable-sdio-wakeup' DT property support mmc: mmc_test: use kzalloc_flex mmc: mtk-sd: disable new_tx/rx and modify related settings for mt8189 dt-bindings: mmc: hisilicon,hi3660-dw-mshc: Convert to DT schema dt-bindings: mmc: sdhci-msm: add IPQ9650 compatible mmc: block: use single block write in retry ... 2026-04-14T19:48:38+00:00 Wolfram Sang wsa+renesas@sang-engineering.com 2026-04-14T19:48:38+00:00 urn:sha1:e336aa3c396ba41fd5a3b818df917a70f39594a5 i2c-host for v7.1, part 1 - generic cleanups in npcm7xx, qcom-cci, xiic and designware DT bindings - atr: use kzalloc_flex for alias pool allocation - ixp4xx: convert bindings to DT schema - ocores: use read_poll_timeout_atomic() for polling waits - qcom-geni: skip extra TX DMA TRE for single read messages - s3c24xx: validate SMBus block length before using it - spacemit: refactor xfer path and add K1 PIO support - tegra: identify DVC and VI with SoC data variants - tegra: support SoC-specific register offsets - xiic: switch to devres and generic fw properties - xiic: skip input clock setup on non-OF systems rtl9300: - add per-SoC callbacks and clock support for RTL9607C - add support for new 50 kHz and 2.5 MHz bus speeds - general refactoring in preparation for RTL9607C support New support: - DesignWare GOOG5000 (ACPI HID) - Intel Nova Lake (ACPI ID) - Realtek RTL9607C - SpacemiT K3 binding - Tegra410 register layout support 2026-04-14T02:03:11+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-04-14T02:03:11+00:00 urn:sha1:4793dae01f47754e288cdbb3a22581cac2317f2b Pull driver core updates from Danilo Krummrich: "debugfs: - Fix NULL pointer dereference in debugfs_create_str() - Fix misplaced EXPORT_SYMBOL_GPL for debugfs_create_str() - Fix soundwire debugfs NULL pointer dereference from uninitialized firmware_file device property: - Make fwnode flags modifications thread safe; widen the field to unsigned long and use set_bit() / clear_bit() based accessors - Document how to check for the property presence devres: - Separate struct devres_node from its "subclasses" (struct devres, struct devres_group); give struct devres_node its own release and free callbacks for per-type dispatch - Introduce struct devres_action for devres actions, avoiding the ARCH_DMA_MINALIGN alignment overhead of struct devres - Export struct devres_node and its init/add/remove/dbginfo primitives for use by Rust Devres<T> - Fix missing node debug info in devm_krealloc() - Use guard(spinlock_irqsave) where applicable; consolidate unlock paths in devres_release_group() driver_override: - Convert PCI, WMI, vdpa, s390/cio, s390/ap, and fsl-mc to the generic driver_override infrastructure, replacing per-bus driver_override strings, sysfs attributes, and match logic; fixes a potential UAF from unsynchronized access to driver_override in bus match() callbacks - Simplify __device_set_driver_override() logic kernfs: - Send IN_DELETE_SELF and IN_IGNORED inotify events on kernfs file and directory removal - Add corresponding selftests for memcg platform: - Allow attaching software nodes when creating platform devices via a new 'swnode' field in struct platform_device_info - Add kerneldoc for struct platform_device_info software node: - Move software node initialization from postcore_initcall() to driver_init(), making it available early in the boot process - Move kernel_kobj initialization (ksysfs_init) earlier to support the above - Remove software_node_exit(); dead code in a built-in unit SoC: - Introduce of_machine_read_compatible() and of_machine_read_model() OF helpers and export soc_attr_read_machine() to replace direct accesses to of_root from SoC drivers; also enables CONFIG_COMPILE_TEST coverage for these drivers sysfs: - Constify attribute group array pointers to 'const struct attribute_group *const *' in sysfs functions, device_add_groups() / device_remove_groups(), and struct class Rust: - Devres: - Embed struct devres_node directly in Devres<T> instead of going through devm_add_action(), avoiding the extra allocation and the unnecessary ARCH_DMA_MINALIGN alignment - I/O: - Turn IoCapable from a marker trait into a functional trait carrying the raw I/O accessor implementation (io_read / io_write), providing working defaults for the per-type Io methods - Add RelaxedMmio wrapper type, making relaxed accessors usable in code generic over the Io trait - Remove overloaded per-type Io methods and per-backend macros from Mmio and PCI ConfigSpace - I/O (Register): - Add IoLoc trait and generic read/write/update methods to the Io trait, making I/O operations parameterizable by typed locations - Add register! macro for defining hardware register types with typed bitfield accessors backed by Bounded values; supports direct, relative, and array register addressing - Add write_reg() / try_write_reg() and LocatedRegister trait - Update PCI sample driver to demonstrate the register! macro Example: ``` register! { /// UART control register. CTRL(u32) @ 0x18 { /// Receiver enable. 19:19 rx_enable => bool; /// Parity configuration. 14:13 parity ?=> Parity; } /// FIFO watermark and counter register. WATER(u32) @ 0x2c { /// Number of datawords in the receive FIFO. 26:24 rx_count; /// RX interrupt threshold. 17:16 rx_water; } } impl WATER { fn rx_above_watermark(&self) -> bool { self.rx_count() > self.rx_water() } } fn init(bar: &pci::Bar<BAR0_SIZE>) { let water = WATER::zeroed() .with_const_rx_water::<1>(); // > 3 would not compile bar.write_reg(water); let ctrl = CTRL::zeroed() .with_parity(Parity::Even) .with_rx_enable(true); bar.write_reg(ctrl); } fn handle_rx(bar: &pci::Bar<BAR0_SIZE>) { if bar.read(WATER).rx_above_watermark() { // drain the FIFO } } fn set_parity(bar: &pci::Bar<BAR0_SIZE>, parity: Parity) { bar.update(CTRL, |r| r.with_parity(parity)); } ``` - IRQ: - Move 'static bounds from where clauses to trait declarations for IRQ handler traits - Misc: - Enable the generic_arg_infer Rust feature - Extend Bounded with shift operations, single-bit bool conversion, and const get() Misc: - Make deferred_probe_timeout default a Kconfig option - Drop auxiliary_dev_pm_ops; the PM core falls back to driver PM callbacks when no bus type PM ops are set - Add conditional guard support for device_lock() - Add ksysfs.c to the DRIVER CORE MAINTAINERS entry - Fix kernel-doc warnings in base.h - Fix stale reference to memory_block_add_nid() in documentation" * tag 'driver-core-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (67 commits) bus: fsl-mc: use generic driver_override infrastructure s390/ap: use generic driver_override infrastructure s390/cio: use generic driver_override infrastructure vdpa: use generic driver_override infrastructure platform/wmi: use generic driver_override infrastructure PCI: use generic driver_override infrastructure driver core: make software nodes available earlier software node: remove software_node_exit() kernel: ksysfs: initialize kernel_kobj earlier MAINTAINERS: add ksysfs.c to the DRIVER CORE entry drivers/base/memory: fix stale reference to memory_block_add_nid() device property: Document how to check for the property presence soundwire: debugfs: initialize firmware_file to empty string debugfs: fix placement of EXPORT_SYMBOL_GPL for debugfs_create_str() debugfs: check for NULL pointer in debugfs_create_str() driver core: Make deferred_probe_timeout default a Kconfig option driver core: simplify __device_set_driver_override() clearing logic driver core: auxiliary bus: Drop auxiliary_dev_pm_ops device property: Make modifications of fwnode "flags" thread safe rust: devres: embed struct devres_node directly ... 2026-04-10T21:08:42+00:00 Arun T arun.t@intel.com 2026-04-10T08:04:08+00:00 urn:sha1:e43f2df330a1b87c97235e4faade860d15787735 Add device IDs of Nova Lake into i2c-usbio support list Signed-off-by: Arun T <arun.t@intel.com> Reviewed-by: Vadillo Miguel <miguel.vadillo@intel.com> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20260410080408.562311-1-arun.t@intel.com 2026-04-10T20:27:10+00:00 Aniket Randive aniket.randive@oss.qualcomm.com 2026-04-10T10:19:49+00:00 urn:sha1:656147fb1d4ce047a3889d1b9539cdec0327cc16 In GPI mode, the I2C GENI driver programs an extra TX DMA transfer descriptor (TRE) on the TX channel when handling a single read message. This results in an unintended write phase being issued on the I2C bus, even though a read transaction does not require any TX data. For a single-byte read, the correct hardware sequence consists of the CONFIG and GO commands followed by a single RX DMA TRE. Programming an additional TX DMA TRE is redundant, causes unnecessary DMA buffer mapping on the TX channel, and may lead to incorrect bus behavior. Update the transfer logic to avoid programming a TX DMA TRE for single read messages in GPI mode. Co-developed-by: Maramaina Naresh <naresh.maramaina@oss.qualcomm.com> Signed-off-by: Maramaina Naresh <naresh.maramaina@oss.qualcomm.com> Signed-off-by: Aniket Randive <aniket.randive@oss.qualcomm.com> Reviewed-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20260410101949.2315058-1-aniket.randive@oss.qualcomm.com 2026-04-09T23:16:59+00:00 Rosen Penev rosenp@gmail.com 2026-03-27T03:03:10+00:00 urn:sha1:6ecea2083d61f2b440477693b8b024df00dccbb4 Convert kzalloc_obj + kcalloc to kzalloc_flex to save an allocation. Add __counted_by to get extra runtime analysis. Signed-off-by: Rosen Penev <rosenp@gmail.com> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20260327030310.8502-1-rosenp@gmail.com 2026-04-09T16:33:55+00:00 Troy Mitchell troy.mitchell@linux.spacemit.com 2026-02-07T15:08:22+00:00 urn:sha1:5dd75dac1b35e5b24f5051d01fc85105adcc2e15 This patch introduces I2C PIO functionality for the Spacemit K1 SoC, enabling the use of I2C in atomic context. When i2c xfer_atomic is invoked, use_pio is set accordingly. Since an atomic context is required, all interrupts are disabled when operating in PIO mode. Even with interrupts disabled, the bits in the ISR (Interrupt Status Register) will still be set, so error handling can be performed by polling the relevant status bits in the ISR. Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com> Tested-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20260207-b4-k3-i2c-pio-v7-2-626942d94d91@linux.spacemit.com 2026-04-09T16:33:50+00:00 Troy Mitchell troy.mitchell@linux.spacemit.com 2026-02-07T15:08:21+00:00 urn:sha1:5b74da8e6cf7e2b5aed0836c733238c0fd7235af The upcoming PIO support requires a wait_pio_xfer() helper, which is invoked from xfer_msg(). Since wait_pio_xfer() depends on err_check(), move the definition of xfer_msg() after err_check() to avoid a forward declaration of err_check(). Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Alex Elder <elder@riscstar.com> Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com> Tested-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20260207-b4-k3-i2c-pio-v7-1-626942d94d91@linux.spacemit.com