gpio: shared: fix a race condition

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When matching the reset-gpio reference with the actual firmware node
consuming the GPIO, we also need to lock the structure associated with
the latter as it can change while we're doing it.

Due to triggering lockdep false-positives, we need to use a per-reference
lockdep class but accidentally, this also allows us to remove the
previous lockdep workaround for cleaner code.

Fixes: 49416483a9 ("gpio: shared: allow sharing a reset-gpios pin between reset-gpio and gpiolib")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Closes: https://lore.kernel.org/all/00107523-7737-4b92-a785-14ce4e93b8cb@samsung.com/
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20260106-gpio-shared-fixes-v2-2-c7091d2f7581@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

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Bartosz Golaszewski 2026-01-06 10:34:22 +01:00

parent 0fe5063179

commit 476e44d06f

1 changed files with 9 additions and 11 deletions

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drivers/gpio/gpiolib-shared.c

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