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:Hans de Goede <hdegoede@redhat.com> Tested-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org>
parent
0b305ccc
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