[PATCH 2/5] drm: Do not accept garbage mode aspect ratio flags

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Don't let userspace feed us any old garbage in the mode aspect ratio
flags.

Cc: Ilia Mirkin <imirkin at alum.mit.edu>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/drm_modes.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 53acc6756ee0..847048dee048 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1977,9 +1977,11 @@ int drm_mode_convert_umode(struct drm_device *dev,
 	case DRM_MODE_FLAG_PIC_AR_256_135:
 		out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135;
 		break;
-	default:
+	case DRM_MODE_FLAG_PIC_AR_NONE:
 		out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
 		break;
+	default:
+		return -EINVAL;
 	}
 
 	out->status = drm_mode_validate_driver(dev, out);
-- 
2.21.0