[PATCH 1/2] drm: make sure visible is set to false if fb is null

[Ville Syrjälä]

On Fri, Oct 24, 2014 at 07:00:17PM +0100, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
> 
> We can't let visible set true while the fb is null, some places of
> the code only check for visible to base its decisions.
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>

For the series:
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/drm_plane_helper.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
> index 827ec1a..fe4d1fb 100644
> --- a/drivers/gpu/drm/drm_plane_helper.c
> +++ b/drivers/gpu/drm/drm_plane_helper.c
> @@ -127,6 +127,11 @@ int drm_plane_helper_check_update(struct drm_plane *plane,
>  		return -ERANGE;
>  	}
>  
> +	if (!fb) {
> +		*visible = false;
> +		return 0;
> +	}
> +
>  	*visible = drm_rect_clip_scaled(src, dest, clip, hscale, vscale);
>  	if (!*visible)
>  		/*
> -- 
> 1.9.3
> 
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-- 
Ville Syrjälä
Intel OTC