From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 25 Sep 2017 13:30:38 +0300
Subject: drm: of: always initialize panel in drm_of_find_panel_or_bridge()
Git-commit: 320e421ea303b1e53451b2b4cd3ad18cdd043b3b
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
The callers expect "panel" to be initialized, but that isn't true if we
return -ENODEV. It causes bugs like:
drivers/gpu/drm/tve200/tve200_drv.c:83 tve200_modeset_init()
error: uninitialized symbol 'panel'.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20170925103038.lvr5msjvekwczctn@mwanda
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/drm_of.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -233,6 +233,8 @@ int drm_of_find_panel_or_bridge(const st
if (!panel && !bridge)
return -EINVAL;
+ if (panel)
+ *panel = NULL;
remote = of_graph_get_remote_node(np, port, endpoint);
if (!remote)