udl: handle EDID failure properly.

Don't oops seems proper. Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
linux-sunxi · Apr 12, 2013 · 1baee58 · 1baee58
1 parent cfb63ba
commit 1baee58
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/gpu/drm/udl/udl_connector.c b/drivers/gpu/drm/udl/udl_connector.c
@@ -61,6 +61,10 @@ static int udl_get_modes(struct drm_connector *connector)
 	int ret;
 
 	edid = (struct edid *)udl_get_edid(udl);
+	if (!edid) {
+		drm_mode_connector_update_edid_property(connector, NULL);
+		return 0;
+	}
 
 	/*
 	 * We only read the main block, but if the monitor reports extension