From: Arnd Bergmann
Date: Tue, 6 Sep 2016 21:20:36 +0200
> gpio_to_irq does not return NO_IRQ but instead returns a negative
> error code on failure. Returning NO_IRQ from the function has no
> negative effects as we only compare the result to the expected
> interrupt number, but it's better to
gpio_to_irq does not return NO_IRQ but instead returns a negative
error code on failure. Returning NO_IRQ from the function has no
negative effects as we only compare the result to the expected
interrupt number, but it's better to return a proper failure
code for consistency, and we should remove N
