gpio: make sure gpiod_to_irq() returns negative on NULL desc

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commit 54d77198fd
("gpio: bail out silently on NULL descriptors")
doesn't work for gpiod_to_irq(): drivers assume that NULL
descriptors will give negative IRQ numbers in return.

It has been pointed out that returning 0 is NO_IRQ and that
drivers should be amended to treat this as an error, but that
is for the longer term: now let us repair the semantics.

Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Reported-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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Linus Walleij 2016-06-15 22:57:38 +02:00 • committed by Richard Weinberger

parent 0b305ccc1b

commit 39243ee771

1 changed files with 8 additions and 1 deletions

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drivers/gpio/gpiolib.c

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