Re: [PATCH v2 1/6] rcar-vin: Fix incorrect return statement in rvin_try_format()

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Niklas,

Thank you for the patch.

On Thu, Aug 08, 2019 at 03:18:45AM +0200, Niklas Söderlund wrote:
> While refactoring code the return statement became corrupted, fix it by
> returning the correct return code.
> 
> Reported-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Fixes: 897e371389e77514 ("media: rcar-vin: simplify how formats are set and reset"
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---
>  drivers/media/platform/rcar-vin/rcar-v4l2.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> index cfed0a2604133849..402b40fcf7184fde 100644
> --- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
> +++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> @@ -239,7 +239,7 @@ static int rvin_try_format(struct rvin_dev *vin, u32 which,
>  done:
>  	v4l2_subdev_free_pad_config(pad_cfg);
>  
> -	return 0;
> +	return ret;

If the v4l2_subdev_call() call above returns -ENOIOCTLCMD, which you
don't consider as an error, you will end up returning that error value
here. You should set ret to 0 before the done: label. With this fixed,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

>  }
>  
>  static int rvin_querycap(struct file *file, void *priv,

-- 
Regards,

Laurent Pinchart