Re: [PATCH] gpio: zynq: Implement irq_(request|release)_resources

From: Linus Walleij
Date: Wed Oct 28 2015 - 11:20:50 EST

On Tue, Oct 27, 2015 at 6:54 PM, Grygorii Strashko
<grygorii.strashko@xxxxxx> wrote:
> [Me]
>> Do you mean that these functions contain calls to non-atomic
>> functions?
> Oh. No, I have to be more specific :(
> if GPIOx driver defines custom .irq_(request|release)_resources() callbacks
> they will *overwrite* standard GPIOirqchip callbacks.
> (commit: 8b67a1f "gpio: don't override irq_*_resources() callbacks")
> As result, such GPIOx driver should *re-implement* the same functionality in
> its .irq_(request|release)_resources() callbacks as implemented in
> gpiochip_irq_reqres()/gpiochip_irq_relres().

Yes that goes for all drivers not using gpiochip_add_irqchip().
Not everyone uses that ... and for those supplying their own
implementations of these functions.

Linus Walleij
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