drm: of: Fix double-free bug

Fix double-free bug in the error path.

Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1595502654-40595-1-git-send-email-biju.das.jz@bp.renesas.com

diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index b50b44e..8fc3f67 100644 (file)
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -322,10 +322,8 @@ 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) {
-                       of_node_put(remote_port);
+               if (!current_pt || pixels_type != current_pt)
                        return -EINVAL;
-               }
        }
 
        return pixels_type;