gpio: shared: gracefully handle no-device lookup of shared GPIOs

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We use platform lookup tables for shared GPIOs. This mechanism needs a
struct device to work so fwnode-based lookup with no device associated
currently causes a NULL-pointer deference.

Adding this functionality will require a larger rework and it has never
worked anyway so add a check that allows the kernel to gracefully handle
this situation with an error ahead of implementing that functionality as
a new feature.

Cc: stable@vger.kernel.org
Reported-by: Abel Vesa <abelvesa@kernel.org>
Fixes: a060b8c511 ("gpiolib: implement low-level, shared GPIO support")
Link: https://patch.msgid.link/20261014-gpio-shared-fwnode-lookup-v4-2-2253ad645fd6@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

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Bartosz Golaszewski 2026-10-14 11:38:26 +02:00

parent bd22f7e635

commit cf73c3fc03

1 changed files with 6 additions and 1 deletions

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7

drivers/gpio/gpiolib-shared.c

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