gpio: improve the API contract for setting direction

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If a GPIO driver returns a positive integer from one of the direction
setter callbacks, we'll end up propagating it to user-space. Whether we
should sanitize the values returned by callbacks is a different question
but let's first improve the documentation and fortify the contract with
GPIO providers.

Reported-by: José Guilherme de Castro Rodrigues <joseguilhermebh@hotmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Kent Gibson <warthog618@gmail.com>

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Bartosz Golaszewski 2024-01-25 09:35:07 +01:00

parent 88b7049635

commit 6933ba529d

1 changed files with 6 additions and 4 deletions

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include/linux/gpio/driver.h

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