[PATCH 3/5] drm: WARN on illegal aspect ratio when converting a mode to umode

[Ville Syrjala]

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

WARN if the incoming drm_display_mode has an illegal aspect ratio
when converting it to a user mode. This should never happen unless
the driver made a mistake and put an invalid value into the aspect
ratio.

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 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 847048dee048..be2ccd8eccfd 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1906,8 +1906,11 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 	case HDMI_PICTURE_ASPECT_256_135:
 		out->flags |= DRM_MODE_FLAG_PIC_AR_256_135;
 		break;
-	case HDMI_PICTURE_ASPECT_RESERVED:
 	default:
+		WARN(1, "Invalid aspect ratio (0%x) on mode\n",
+		     in->picture_aspect_ratio);
+		/* fall through */
+	case HDMI_PICTURE_ASPECT_NONE:
 		out->flags |= DRM_MODE_FLAG_PIC_AR_NONE;
 		break;
 	}
-- 
2.21.0