linux-kernel - [PATCH] drm/imx: parallel-display: check return value of devm_drm_bridge_add() in imx_pd

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Message-Id: <20260204090629.2209542-1-nichen@iscas.ac.cn>
Date: Wed,  4 Feb 2026 17:06:29 +0800
From: Chen Ni <nichen@...as.ac.cn>
To: p.zabel@...gutronix.de,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch,
	Frank.Li@....com,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	luca.ceresoli@...tlin.com,
	louis.chauvet@...tlin.com
Cc: dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Chen Ni <nichen@...as.ac.cn>
Subject: [PATCH] drm/imx: parallel-display: check return value of devm_drm_bridge_add() in imx_pd_probe()

Return the value of devm_drm_bridge_add() in order to propagate the
error properly, if it fails due to resource allocation failure or bridge
registration failure.

This ensures that the probe function fails safely rather than proceeding
with a potentially incomplete bridge setup.

Fixes: bf7e97910b9f ("drm/imx: parallel-display: add the bridge before attaching it")
Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
 drivers/gpu/drm/imx/ipuv3/parallel-display.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imx/ipuv3/parallel-display.c b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
index 6fbf505d2801..590120a33fa0 100644
--- a/drivers/gpu/drm/imx/ipuv3/parallel-display.c
+++ b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
@@ -256,7 +256,9 @@ static int imx_pd_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, imxpd);
 
-	devm_drm_bridge_add(dev, &imxpd->bridge);
+	ret = devm_drm_bridge_add(dev, &imxpd->bridge);
+	if (ret)
+		return ret;
 
 	return component_add(dev, &imx_pd_ops);
 }
-- 
2.25.1