[PATCH] drm/omap: check plane size

[Tomi Valkeinen]

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>
---
 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;
 
-- 
2.5.0