[PATCH 5.7 029/120] drm: of: Fix double-free bug

[Greg Kroah-Hartman]

From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

commit 4ee48cc5586bf519df19894273002aa8ef7b70ad upstream.

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@xxxxxxx>
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/1595502654-40595-1-git-send-email-biju.das.jz@xxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/drm_of.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- 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
 		 * 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;