gpiolib: irq hooks: fix recursion in gpiochip_irq_unmask

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irqchip shared with multiple gpiochips, leads to recursive call of
gpiochip_irq_mask/gpiochip_irq_unmask which was assigned to
rqchip->irq_mask/irqchip->irq_unmask, these happens becouse of
only irqchip->irq_enable == gpiochip_irq_enable is checked.

Let's add an additional check to make sure shared irqchip is detected
even if irqchip->irq_enable wasn't defined.

Fixes: a8173820f4 ("gpio: gpiolib: Allow GPIO IRQs to lazy disable")
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
Link: https://lore.kernel.org/r/20201210070514.13238-1-nikita.shubin@maquefel.me
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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Nikita Shubin 2020-12-10 10:05:14 +03:00 • committed by Linus Walleij

parent e6071cada1

commit 9d55221995

1 changed files with 2 additions and 1 deletions

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drivers/gpio/gpiolib.c

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