linux-kernel - [PATCH] drm/bridge: samsung-dsim: Fix device node reference leak in samsung_dsim_parse

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Message-Id: <20251029074121.15260-1-linmq006@gmail.com>
Date: Wed, 29 Oct 2025 15:41:20 +0800
From: Miaoqian Lin <linmq006@...il.com>
To: Inki Dae <inki.dae@...sung.com>,
	Jagan Teki <jagan@...rulasolutions.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	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>,
	Kaustabh Chakraborty <kauschluss@...root.org>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: linmq006@...il.com,
	stable@...r.kernel.org
Subject: [PATCH] drm/bridge: samsung-dsim: Fix device node reference leak in samsung_dsim_parse_dt

The function samsung_dsim_parse_dt() calls of_graph_get_endpoint_by_regs()
to get the endpoint device node, but fails to call of_node_put() to release
the reference when the function returns. This results in a device node
reference leak.

Fix this by adding the missing of_node_put() call before returning from
the function.

Found via static analysis and code review.

Fixes: 77169a11d4e9 ("drm/bridge: samsung-dsim: add driver support for exynos7870 DSIM bridge")
Cc: stable@...r.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index eabc4c32f6ab..1a5acd5077ad 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -2086,6 +2086,7 @@ static int samsung_dsim_parse_dt(struct samsung_dsim *dsi)
 		if (lane_polarities[1])
 			dsi->swap_dn_dp_data = true;
 	}
+	of_node_put(endpoint);
 
 	return 0;
 }
-- 
2.39.5 (Apple Git-154)