Re: [PATCH 1/4] gpio: virtuser: fix missing lookup table cleanup on probe failure

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Tue, Dec 24, 2024 at 7:08 AM Koichiro Den <koichiro.den@xxxxxxxxxxxxx> wrote:
>
> When a virtuser device is created via configfs and the probe fails due
> to an incorrect lookup table, the table is not removed. This prevents
> subsequent probe attempts from succeeding, even if the issue is
> corrected, unless the device is released.
>
> Ensure the lookup table is removed whenever the probe fails.
>
> Fixes: 91581c4b3f29 ("gpio: virtuser: new virtual testing driver for the GPIO API")
> Signed-off-by: Koichiro Den <koichiro.den@xxxxxxxxxxxxx>
> ---
>  drivers/gpio/gpio-virtuser.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpio-virtuser.c b/drivers/gpio/gpio-virtuser.c
> index 91b6352c957c..a81e15a4b807 100644
> --- a/drivers/gpio/gpio-virtuser.c
> +++ b/drivers/gpio/gpio-virtuser.c
> @@ -1509,6 +1509,7 @@ gpio_virtuser_device_activate(struct gpio_virtuser_device *dev)
>         if (!dev->driver_bound) {
>                 platform_device_unregister(pdev);
>                 fwnode_remove_software_node(swnode);
> +               gpiod_remove_lookup_table(dev->lookup_table);
>                 return -ENXIO;
>         }
>
> --
> 2.43.0
>

Good catch! Don't we need to do the same if the call to
platform_device_register_full() fails?

Bart