kernel/linux.git/drivers/mux, branch v6.18.21

mux: mmio: fix regmap leak on probe failure

2026-03-04T12:21:23+00:00

[ Upstream commit 3c4ae63073d84abee5d81ce46d86a94e9dae9c89 ] The mmio regmap that may be allocated during probe is never freed. Switch to using the device managed allocator so that the regmap is released on probe failures (e.g. probe deferral) and on driver unbind. Fixes: 61de83fd8256 ("mux: mmio: Do not use syscon helper to build regmap") Cc: stable@vger.kernel.org # 6.16 Cc: Andrew Davis Signed-off-by: Johan Hovold Acked-by: Andrew Davis Link: https://patch.msgid.link/20251127134702.1915-1-johan@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

Merge tag 'hardening-v6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2025-07-29T00:16:12+00:00

Pull hardening updates from Kees Cook: - Introduce and start using TRAILING_OVERLAP() helper for fixing embedded flex array instances (Gustavo A. R. Silva) - mux: Convert mux_control_ops to a flex array member in mux_chip (Thorsten Blum) - string: Group str_has_prefix() and strstarts() (Andy Shevchenko) - Remove KCOV instrumentation from __init and __head (Ritesh Harjani, Kees Cook) - Refactor and rename stackleak feature to support Clang - Add KUnit test for seq_buf API - Fix KUnit fortify test under LTO * tag 'hardening-v6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (22 commits) sched/task_stack: Add missing const qualifier to end_of_stack() kstack_erase: Support Clang stack depth tracking kstack_erase: Add -mgeneral-regs-only to silence Clang warnings init.h: Disable sanitizer coverage for __init and __head kstack_erase: Disable kstack_erase for all of arm compressed boot code x86: Handle KCOV __init vs inline mismatches arm64: Handle KCOV __init vs inline mismatches s390: Handle KCOV __init vs inline mismatches arm: Handle KCOV __init vs inline mismatches mips: Handle KCOV __init vs inline mismatch powerpc/mm/book3s64: Move kfence and debug_pagealloc related calls to __init section configs/hardening: Enable CONFIG_INIT_ON_FREE_DEFAULT_ON configs/hardening: Enable CONFIG_KSTACK_ERASE stackleak: Split KSTACK_ERASE_CFLAGS from GCC_PLUGINS_CFLAGS stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth stackleak: Rename STACKLEAK to KSTACK_ERASE seq_buf: Introduce KUnit tests string: Group str_has_prefix() and strstarts() kunit/fortify: Add back "volatile" for sizeof() constants acpi: nfit: intel: avoid multiple -Wflex-array-member-not-at-end warnings ...

mux: mmio: Fix missing CONFIG_REGMAP_MMIO

2025-07-04T14:27:08+00:00

MMIO mux uses now regmap_init_mmio(), so one way or another CONFIG_REGMAP_MMIO should be enabled, because there are no stubs for !REGMAP_MMIO case: ERROR: modpost: "__regmap_init_mmio_clk" [drivers/mux/mux-mmio.ko] undefined! Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202505150312.dYbBqUhG-lkp@intel.com/ Fixes: 61de83fd8256 ("mux: mmio: Do not use syscon helper to build regmap") Acked-by: Arnd Bergmann Link: https://lore.kernel.org/r/20250521152354.92720-2-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250616093841.31985-2-krzysztof.kozlowski@linaro.org Signed-off-by: Greg Kroah-Hartman

mux: Convert mux_control_ops to a flex array member in mux_chip

2025-06-18T21:20:32+00:00

Convert mux_control_ops to a flexible array member at the end of the mux_chip struct and add the __counted_by() compiler attribute to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE. Use struct_size() to calculate the number of bytes to allocate for a new mux chip and to remove the following Coccinelle/coccicheck warning: WARNING: Use struct_size Use size_add() to safely add any extra bytes. No functional changes intended. Link: https://github.com/KSPP/linux/issues/83 Signed-off-by: Thorsten Blum Link: https://lore.kernel.org/r/20250610104106.1948-2-thorsten.blum@linux.dev Signed-off-by: Kees Cook

mux: adgs1408: fix Wvoid-pointer-to-enum-cast warning

2025-05-08T15:12:08+00:00

'chip_id' is an enum, thus cast of pointer on 64-bit compile test with W=1 causes: adgs1408.c:63:12: error: cast to smaller integer type 'enum adgs1408_chip_id' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast] Reviewed-by: Nuno Sá Link: https://lore.kernel.org/r/20250501181819.164207-2-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski

mux: gpio: add optional regulator support

2025-05-08T12:55:36+00:00

Some of the external muxes needs powering up using a regulator. This is the case with Lenovo T14s laptop which has a external audio mux to handle US/EURO headsets. Add support to the driver to handle this optional regulator. Signed-off-by: Srinivas Kandagatla Tested-by: Christopher Obbard Reviewed-by: Johan Hovold Tested-by: Johan Hovold Link: https://lore.kernel.org/r/20250327100633.11530-3-srinivas.kandagatla@linaro.org [krzk: Adjust dev_err message per Johan's review] Signed-off-by: Krzysztof Kozlowski

mux: mmio: Do not use syscon helper to build regmap

2025-05-01T17:47:35+00:00

The syscon helper device_node_to_regmap() is used to fetch a regmap registered to a device node. It also currently creates this regmap if the node did not already have a regmap associated with it. This should only be used on "syscon" nodes. This driver is not such a device and instead uses device_node_to_regmap() on its own node as a hacky way to create a regmap for itself. This will not work going forward and so we should create our regmap the normal way by defining our regmap_config, fetching our memory resource, then using the normal regmap_init_mmio() function. Signed-off-by: Andrew Davis Tested-by: Nishanth Menon Link: https://lore.kernel.org/r/20250123182059.597491-1-afd@ti.com Signed-off-by: Krzysztof Kozlowski

mux: adg792a: remove incorrect of_match_ptr annotation

2025-05-01T17:43:43+00:00

Building with W=1 shows a warning about adg792a_of_match being unused when CONFIG_OF is disabled: drivers/mux/adg792a.c:134:34: error: unused variable 'adg792a_of_match' [-Werror,-Wunused-const-variable] Acked-by: Peter Rosin Signed-off-by: Arnd Bergmann Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20250409122314.2848028-4-arnd@kernel.org Signed-off-by: Krzysztof Kozlowski

mux: adgs1408: simplify with spi_get_device_match_data()

2025-05-01T17:41:23+00:00

Use spi_get_device_match_data() helper to simplify a bit the driver. Link: https://lore.kernel.org/r/20240606142443.130517-1-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski

mux: mmio: Add missing word in error message

2025-05-01T17:40:35+00:00

s/failed allocate/failed to allocate/ Signed-off-by: Thorsten Blum Link: https://lore.kernel.org/r/20250316135857.1584-2-thorsten.blum@linux.dev Signed-off-by: Krzysztof Kozlowski