Re: [PATCH v4 0/5] gpio: sysfs: send character device notifications for sysfs class events

[Kent Gibson <warthog618@xxxxxxxxx>]

On Thu, Oct 31, 2024 at 09:01:50PM +0100, Bartosz Golaszewski wrote:
> This may be a total corner-case but for consistency and completeness I
> think it makes sense to also send out line state change events on actions
> triggered from the GPIO sysfs class.
>
> The first two patches use cleanup helpers in sysfs code. The next three
> change the code to emit notifications on line export (unexport is
> already handled) and active_low & edge changes.
>
> One last thing I considered was also notifying user-space whenever
> gpiochip_un/lock_as_irq() is called but that doesn't make much sense as
> it's largely independent from the GPIO core and can be called for both
> requested and available lines whenever someone requests an interrupt
> from a GPIO controller.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

Looks good to me, though I'm sure there are a few places Andy would like
to tidy up the ret/error handling :).

Reviewed-by: Kent Gibson <warthog618@xxxxxxxxx>

Cheers,
Kent.