Re: [PATCH v3] pinctrl: sunxi: fix gpiochip_lock_as_irq() failure when pinmux is unknown

[Chen-Yu Tsai]

On Thu, Mar 19, 2026 at 9:46 PM Linus Walleij <linusw@xxxxxxxxxx> wrote:
>
> On Sat, Mar 14, 2026 at 9:10 AM Michal Piekos
> <michal.piekos@xxxxxxxxxxxxx> wrote:
>
> > Fixes kernel hang during boot due to inability to set up IRQ on AXP313a.
> >
> > The issue is caused by gpiochip_lock_as_irq() which is failing when gpio
> > is in unitialized state.
> >
> > Solution is to set pinmux to GPIO INPUT in
> > sunxi_pinctrl_irq_request_resources() if it wasn't initialized
> > earlier.
> >
> > Tested on Orange Pi Zero 3.
> >
> > Signed-off-by: Michal Piekos <michal.piekos@xxxxxxxxxxxxx>
> > Suggested-by: Chen-Yu Tsai <wens@xxxxxxxxxx>
>
> Should this have a Fixes: tag and should it be applied as an urgent fix?

Fixes: 01e10d0272b9 ("pinctrl: sunxi: Implement gpiochip::get_direction()")

> Tag for stable?

The original patch wasn't tagged for stable. And it doesn't seem like it
was auto picked.

> Also: is there consensus with Andre that this is the way to proceed?

As Andre mentioned, the mux value for "disabled" is different between
generations. So we likely need to make the value part of
|struct sunxi_pinctrl_desc|.

Michal, can you respin a version so that we can get this fixed in the
same release?


ChenYu