Re: [PATCH] pinctrl: meson: amlogic-a4: fix deadlock issue

[Linus Walleij]

On Wed, Apr 22, 2026 at 1:44 PM Xianwei Zhao via B4 Relay
<devnull+xianwei.zhao.amlogic.com@xxxxxxxxxx> wrote:

> From: Xianwei Zhao <xianwei.zhao@xxxxxxxxxxx>
>
> Accessing the pinconf-pins sysfs node may deadlock.
>
> pinconf_pins_show() holds pctldev->mutex, and the platform driver
> calls pinctrl_find_gpio_range_from_pin(), which tries to acquire
> the same mutex again, leading to a deadlock.
>
> Use pinctrl_find_gpio_range_from_pin_nolock() to fix this issue.
>
> Fixes: 6e9be3abb78c ("pinctrl: Add driver support for Amlogic SoCs")
> Signed-off-by: Xianwei Zhao <xianwei.zhao@xxxxxxxxxxx>

Patch applied for fixes!

Yours,
Linus Walleij