linux-kernel - [PATCH] drm/bridge: tc358767: fix missing of_node_put() in for_each_endpoint_of

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Message-Id: <20241013-tc358767-of_node_put-v1-1-97431772c0ff@gmail.com>
Date: Sun, 13 Oct 2024 20:11:29 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Alexander Stein <alexander.stein@...tq-group.com>, 
 Marek Vasut <marex@...x.de>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH] drm/bridge: tc358767: fix missing of_node_put() in
 for_each_endpoint_of_node()

for_each_endpoint_of_node() requires a call to of_node_put() for every
early exit. A new error path was added to the loop without observing
this requirement.

Add the missing call to of_node_put() in the error path.

Fixes: 1fb4dceeedc5 ("drm/bridge: tc358767: Add configurable default preemphasis")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
 drivers/gpu/drm/bridge/tc358767.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 159c95b26d33..942fbaa1413a 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -2405,6 +2405,7 @@ static int tc_probe_bridge_endpoint(struct tc_data *tc)
 			if (tc->pre_emphasis[0] < 0 || tc->pre_emphasis[0] > 2 ||
 			    tc->pre_emphasis[1] < 0 || tc->pre_emphasis[1] > 2) {
 				dev_err(dev, "Incorrect Pre-Emphasis setting, use either 0=0dB 1=3.5dB 2=6dB\n");
+				of_node_put(node);
 				return -EINVAL;
 			}
 		}

---
base-commit: d61a00525464bfc5fe92c6ad713350988e492b88
change-id: 20241013-tc358767-of_node_put-14a3004e9f45

Best regards,
-- 
Javier Carrasco <javier.carrasco.cruz@...il.com>