[PATCH] drm/omap: check plane size

[Laurent Pinchart]

Hi Tomi,

(CC'ing Daniel)

Thank you for the patch.

On Tuesday 26 Apr 2016 13:16:42 Tomi Valkeinen wrote:
> At the moment we don't check the plane input/output sizes, which can
> lead to DSS HW errors when invalid values are given from the userspace.
> 
> Add a check so that the sizes are > 0.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>

I don't think it makes sense to have an empty source or destination rectangle 
for any driver, not just omapdrm. Shouldn't this check be added to 
drm_atomic_plane_check() instead ?

> ---
>  drivers/gpu/drm/omapdrm/omap_plane.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c
> b/drivers/gpu/drm/omapdrm/omap_plane.c index 93ee538a99f5..fa9e5086eb65
> 100644
> --- a/drivers/gpu/drm/omapdrm/omap_plane.c
> +++ b/drivers/gpu/drm/omapdrm/omap_plane.c
> @@ -168,6 +168,12 @@ static int omap_plane_atomic_check(struct drm_plane
> *plane, if (IS_ERR(crtc_state))
>  		return PTR_ERR(crtc_state);
> 
> +	if (state->src_w == 0 || state->src_h == 0)
> +		return -EINVAL;
> +
> +	if (state->crtc_w == 0 || state->crtc_h == 0)
> +		return -EINVAL;
> +
>  	if (state->crtc_x < 0 || state->crtc_y < 0)
>  		return -EINVAL;

-- 
Regards,

Laurent Pinchart