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Commit 39243ee7 authored by Linus Walleij's avatar Linus Walleij Committed by Richard Weinberger
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gpio: make sure gpiod_to_irq() returns negative on NULL desc



commit 54d77198
("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: default avatarHans de Goede <hdegoede@redhat.com>
Tested-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 0b305ccc
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