[PATCH 3/9] drm: rcar-du: Drop unneeded encoder cleanup in error path

[Jacopo Mondi]

Hi Laurent,

On Sat, Dec 05, 2020 at 12:01:33AM +0200, Laurent Pinchart wrote:
> The encoder->name field can never be non-null in the error path, as that
> can only be possible after a successful call to
> drm_simple_encoder_init(). Drop the cleanup.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> ---
>  drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
> index 2d40da98144b..0edce24f2053 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
> @@ -124,11 +124,8 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
>  	}
>
>  done:
> -	if (ret < 0) {
> -		if (encoder->name)
> -			encoder->funcs->destroy(encoder);

This is probably worth a Fixes tag, as accessing encoder->func if
drm_simple_encoder_init() has not completed might lead to a NULL
pointer dereference.


Apart from this, patch looks good
Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>

Thanks
  j

> +	if (ret < 0)
>  		devm_kfree(rcdu->dev, renc);
> -	}
>
>  	return ret;
>  }
> --
> Regards,
>
> Laurent Pinchart
>