gpiolib: sanitize the return value of gpio_chip::direction_output()

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The return value of the direction_output() callback may be propagated to
user-space. As per the API contract it can only return 0 or a negative
error number. Add a wrapper around the callback calls that filters out
anything else.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250210-gpio-sanitize-retvals-v1-6-12ea88506cb2@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

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Bartosz Golaszewski 2025-02-10 11:52:00 +01:00

parent 74abd086d2

commit dfeb70c86d

1 changed files with 21 additions and 4 deletions

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drivers/gpio/gpiolib.c

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