Re: [PATCH] Input: rmi4 - release F54 queue on video registration failure

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Mon, May 25, 2026 at 03:23:45AM +0900, Myeonghun Pak wrote:
> rmi_f54_probe() initializes the videobuf2 queue before registering the
> video device. If video_register_device() fails, probe only unregisters
> the V4L2 device and leaves the initialized queue unwound by neither
> remove nor file release paths.
> 
> Release the queue before continuing through the existing probe error
> path.
> 
> This issue was identified during our ongoing static-analysis research while
> reviewing kernel code.
> 
> Fixes: 3a762dbd5347 ("[media] Input: synaptics-rmi4 - add support for F54 diagnostics")
> Cc: stable@vger.kernel.org
> Co-developed-by: Ijae Kim <ae878000@gmail.com>
> Signed-off-by: Ijae Kim <ae878000@gmail.com>
> Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
> ---
>  drivers/input/rmi4/rmi_f54.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/input/rmi4/rmi_f54.c b/drivers/input/rmi4/rmi_f54.c
> index 61909e1a39..fca7b9fec5 100644
> --- a/drivers/input/rmi4/rmi_f54.c
> +++ b/drivers/input/rmi4/rmi_f54.c
> @@ -722,6 +722,7 @@ static int rmi_f54_probe(struct rmi_function *fn)
>  	ret = video_register_device(&f54->vdev, VFL_TYPE_TOUCH, -1);
>  	if (ret) {
>  		dev_err(&fn->dev, "Unable to register video subdevice.");
> +		vb2_queue_release(&f54->queue);
>  		goto remove_v4l2;
>  	}
>  

Hans, could you please Ack or Nak it? It is unclear to me if this
cleanup is mandatory and whether it is also needed in rmi_f54_remove().

Thanks.

-- 
Dmitry