drm/of: free the right object

[ Upstream commit b557a5f8da5798d27370ed6b73e673aae33efd55 ]

There is no need to free a NULL value.  Instead, free the object
that is leaking due to the iterator.

The semantic patch that finds this problem is as follows:

// <smpl>
@@
expression x,e;
identifier f;
@@
 x = f(...);
 if (x == NULL) {
	... when any
	    when != x = e
*	of_node_put(x);
	...
 }
// </smpl>

Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210709200717.3676376-1-Julia.Lawall@inria.fr
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 ca04c34e8251863d19324e4eb063616ba18034c1..197c574773444624ebc8cd149a678bfbf2370979 100644 (file)
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -315,7 +315,7 @@ static int drm_of_lvds_get_remote_pixels_type(
 
                remote_port = of_graph_get_remote_port(endpoint);
                if (!remote_port) {
-                       of_node_put(remote_port);
+                       of_node_put(endpoint);
                        return -EPIPE;
                }