linux-kernel - [PATCH RESEND v2 2/5] media: staging: media: imx6-mipi-csi2: use devm_mutex

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Message-Id: <20260116-stage-csi2-cleanup-v2-2-a56e9cb25196@nxp.com>
Date: Fri, 16 Jan 2026 11:17:57 -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 RESEND v2 2/5] media: staging: media: imx6-mipi-csi2: use
 devm_mutex_init() to simplify code

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

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/staging/media/imx/imx6-mipi-csi2.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c
index 1113ea2a37f03753423164069b95c049968cc0af..4f740170d2bbf586ac0a58b5d25f8f8432e9e6a3 100644
--- a/drivers/staging/media/imx/imx6-mipi-csi2.c
+++ b/drivers/staging/media/imx/imx6-mipi-csi2.c
@@ -777,12 +777,14 @@ 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;
 
 	ret = clk_prepare_enable(csi2->pllref_clk);
 	if (ret) {
 		v4l2_err(&csi2->sd, "failed to enable pllref_clk\n");
-		goto rmmutex;
+		return ret;
 	}
 
 	ret = clk_prepare_enable(csi2->dphy_clk);
@@ -805,8 +807,6 @@ static int csi2_probe(struct platform_device *pdev)
 	clk_disable_unprepare(csi2->dphy_clk);
 pllref_off:
 	clk_disable_unprepare(csi2->pllref_clk);
-rmmutex:
-	mutex_destroy(&csi2->lock);
 	return ret;
 }
 
@@ -820,7 +820,6 @@ static void csi2_remove(struct platform_device *pdev)
 	v4l2_async_unregister_subdev(sd);
 	clk_disable_unprepare(csi2->dphy_clk);
 	clk_disable_unprepare(csi2->pllref_clk);
-	mutex_destroy(&csi2->lock);
 	media_entity_cleanup(&sd->entity);
 }
 

-- 
2.34.1