Re: [PATCH 03/23] gpio: sysfs: drop redundant lock-as-irq
From: Linus Walleij
Date: Wed Apr 29 2015 - 17:49:03 EST
On Tue, Apr 21, 2015 at 5:42 PM, Johan Hovold <johan@xxxxxxxxxx> wrote:
> Drop redundant lock-as-irq in gpio_setup_irq, which has already been
> handled when requesting and releasing the irq (i.e. in the irq chip
> irq_request_resources and irq_release_resources callbacks).
Well we would hope they all do that. And I hope for the vast majority
that is true, but there is a TODO to go over all gpiochip drivers
(some which are elsewhere in the kernel than drivers/gpio) and
make sure they actually do so.
Right now it's a bit arbitrary if so happens, and in not marked by
the driver as IRQ then this kicks in and provides an additional
But maybe that's overzealous, what do people say?
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