linux-kernel - [PATCH 4/6] media: staging: media: imx6-mipi-csi2: use devm_mutex

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Message-Id: <20251107-stage-csi2-cleanup-v1-4-5d42535243ac@nxp.com>
Date: Fri, 07 Nov 2025 15:44:35 -0500
From: Frank Li <Frank.Li@....com>
To: Steve Longerbeam <slongerbeam@...il.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: imx@...ts.linux.dev, linux-media@...r.kernel.org, 
 linux-staging@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Frank Li <Frank.Li@....com>
Subject: [PATCH 4/6] media: staging: media: imx6-mipi-csi2: use
 devm_mutex_init() to simplify code

Use devm_mutex_init() to simplify the code. No functional change.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/staging/media/imx/imx6-mipi-csi2.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c
index 32ddcef7ec8535a44e121754bb621c0d2e226369..f8d0b3b8b250774af51f2aba731e639131aceff9 100644
--- a/drivers/staging/media/imx/imx6-mipi-csi2.c
+++ b/drivers/staging/media/imx/imx6-mipi-csi2.c
@@ -771,30 +771,23 @@ static int csi2_probe(struct platform_device *pdev)
 	if (!csi2->base)
 		return -ENOMEM;
 
-	mutex_init(&csi2->lock);
+	ret = devm_mutex_init(&pdev->dev, &csi2->lock);
+	if (ret)
+		return ret;
 
 	csi2->num_clks = devm_clk_bulk_get_all(&pdev->dev, &csi2->clks);
 	if (csi2->num_clks < 0)
 		return dev_err_probe(&pdev->dev, csi2->num_clks, "Failed to get clocks\n");
 
-	ret = csi2_async_register(csi2);
-	if (ret)
-		goto clean_notifier;
+	return csi2_async_register(csi2);
 
-	return 0;
-
-clean_notifier:
-	mutex_destroy(&csi2->lock);
-	return ret;
 }
 
 static void csi2_remove(struct platform_device *pdev)
 {
 	struct v4l2_subdev *sd = platform_get_drvdata(pdev);
-	struct csi2_dev *csi2 = sd_to_dev(sd);
 
 	v4l2_async_unregister_subdev(sd);
-	mutex_destroy(&csi2->lock);
 	media_entity_cleanup(&sd->entity);
 }
 

-- 
2.34.1