Re: [PATCH] gpio: sysfs: fix chip removal with GPIOs exported over sysfs

[Johan Hovold]

On Thu, Feb 12, 2026 at 02:35:05PM +0100, Bartosz Golaszewski wrote:
> Currently if we export a GPIO over sysfs and unbind the parent GPIO
> controller, the exported attribute will remain under /sys/class/gpio
> because once we remove the parent device, we can no longer associate the
> descriptor with it in gpiod_unexport() and never drop the final
> reference.

Is this a recent regression? I'm quite sure fixed this once back in
2015.

> Rework the teardown code: provide an unlocked variant of
> gpiod_unexport() and remove all exported GPIOs with the sysfs_lock taken
> before unregistering the parent device itself. This is done to prevent
> any new exports happening before we unregister the device completely.

So please add a Fixes tag here to document this.

> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>

Johan