[PATCH] drm/vc4: plane: check drm_gem_plane_helper_prepare_fb() return value

[Maira Canal]

Hi Simon,

On 12/16/23 11:15, Simon Ser wrote:
> Bubble up any error to the caller.
> 
> Signed-off-by: Simon Ser <contact at emersion.fr>
> Cc: Maxime Ripard <mripard at kernel.org>
> Cc: Kees Cook <keescook at chromium.org>
> Cc: Dave Stevenson <dave.stevenson at raspberrypi.com>

Reviewed-by: Maíra Canal <mcanal at igalia.com>

Best Regards,
- Maíra

> ---
>   drivers/gpu/drm/vc4/vc4_plane.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
> index 00e713faecd5..b8184374332c 100644
> --- a/drivers/gpu/drm/vc4/vc4_plane.c
> +++ b/drivers/gpu/drm/vc4/vc4_plane.c
> @@ -1497,13 +1497,16 @@ static int vc4_prepare_fb(struct drm_plane *plane,
>   			  struct drm_plane_state *state)
>   {
>   	struct vc4_bo *bo;
> +	int ret;
>   
>   	if (!state->fb)
>   		return 0;
>   
>   	bo = to_vc4_bo(&drm_fb_dma_get_gem_obj(state->fb, 0)->base);
>   
> -	drm_gem_plane_helper_prepare_fb(plane, state);
> +	ret = drm_gem_plane_helper_prepare_fb(plane, state);
> +	if (ret)
> +		return ret;
>   
>   	if (plane->state->fb == state->fb)
>   		return 0;