drm/of: free the iterator object on failure

[ Upstream commit 6f9223a56fabc840836b49de27dc7b27642c6a32 ]

When bailing out due to the sanity check the iterator value needs to be
freed because the early return prevents for_each_child_of_node() from
doing the dereference itself.

Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714143300.20632-1-steven.price@arm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index 197c574773444624ebc8cd149a678bfbf2370979..997b8827fed27e87cb856220c9ed41c2dfad9c79 100644 (file)
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -331,8 +331,10 @@ static int drm_of_lvds_get_remote_pixels_type(
                 * configurations by passing the endpoints explicitly to
                 * drm_of_lvds_get_dual_link_pixel_order().
                 */
-               if (!current_pt || pixels_type != current_pt)
+               if (!current_pt || pixels_type != current_pt) {
+                       of_node_put(endpoint);
                        return -EINVAL;
+               }
        }
 
        return pixels_type;