drm/omap: Don't dereference list head when the connectors list is empty

The connectors list iterator returns the list head when the list is
empty. Fix it by returning NULL in that case.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
index f466c4aaee9464c7ca4c16d684a4e7d4bfec5584..19a9b8613620dd45e614165fc44c580298f6b442 100644 (file)
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -306,7 +306,8 @@ struct drm_connector *omap_framebuffer_get_next_connector(
        struct drm_connector *connector = from;
 
        if (!from)
-               return list_first_entry(connector_list, typeof(*from), head);
+               return list_first_entry_or_null(connector_list, typeof(*from),
+                                               head);
 
        list_for_each_entry_from(connector, connector_list, head) {
                if (connector != from) {