linux-kernel - [PATCH v3 3/4] media: i2c: ds90ub953: use devm_mutex

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Message-Id: <20250916-ds90ub953-v3-3-bb7bc6545da7@nxp.com>
Date: Tue, 16 Sep 2025 17:43:45 +0800
From: Guoniu Zhou <guoniu.zhou@....com>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Frank Li <Frank.Li@....com>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev, 
 Guoniu Zhou <guoniu.zhou@....com>
Subject: [PATCH v3 3/4] media: i2c: ds90ub953: use devm_mutex_init() to
 simplify code

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

Signed-off-by: Guoniu Zhou <guoniu.zhou@....com>
---
 drivers/media/i2c/ds90ub953.c | 33 +++++++++++++--------------------
 1 file changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c
index c6b77e4982a3449896e564a288ff1562cb1dcb79..47e7c0a5aae7737182e6a1f2797be01e7ecc8142 100644
--- a/drivers/media/i2c/ds90ub953.c
+++ b/drivers/media/i2c/ds90ub953.c
@@ -1342,7 +1342,9 @@ static int ub953_probe(struct i2c_client *client)
 	if (!priv->plat_data)
 		return dev_err_probe(dev, -ENODEV, "Platform data missing\n");
 
-	mutex_init(&priv->reg_lock);
+	ret = devm_mutex_init(dev, &priv->reg_lock);
+	if (ret)
+		return ret;
 
 	/*
 	 * Initialize to invalid values so that the first reg writes will
@@ -1351,32 +1353,26 @@ static int ub953_probe(struct i2c_client *client)
 	priv->current_indirect_target = 0xff;
 
 	priv->regmap = devm_regmap_init_i2c(client, &ub953_regmap_config);
-	if (IS_ERR(priv->regmap)) {
-		ret = PTR_ERR(priv->regmap);
-		dev_err_probe(dev, ret, "Failed to init regmap\n");
-		goto err_mutex_destroy;
-	}
+	if (IS_ERR(priv->regmap))
+		return dev_err_probe(dev, PTR_ERR(priv->regmap),
+				     "Failed to init regmap\n");
 
 	priv->clkin = devm_clk_get_optional(dev, "clkin");
-	if (IS_ERR(priv->clkin)) {
-		ret = PTR_ERR(priv->clkin);
-		dev_err_probe(dev, ret, "failed to parse 'clkin'\n");
-		goto err_mutex_destroy;
-	}
+	if (IS_ERR(priv->clkin))
+		return dev_err_probe(dev, PTR_ERR(priv->clkin),
+				     "Failed to parse 'clkin'\n");
 
 	ret = ub953_parse_dt(priv);
 	if (ret)
-		goto err_mutex_destroy;
+		return ret;
 
 	ret = ub953_hw_init(priv);
 	if (ret)
-		goto err_mutex_destroy;
+		return ret;
 
 	ret = ub953_gpiochip_probe(priv);
-	if (ret) {
-		dev_err_probe(dev, ret, "Failed to init gpiochip\n");
-		goto err_mutex_destroy;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init gpiochip\n");
 
 	ret = ub953_register_clkout(priv);
 	if (ret) {
@@ -1400,8 +1396,6 @@ static int ub953_probe(struct i2c_client *client)
 	ub953_subdev_uninit(priv);
 err_gpiochip_remove:
 	ub953_gpiochip_remove(priv);
-err_mutex_destroy:
-	mutex_destroy(&priv->reg_lock);
 
 	return ret;
 }
@@ -1416,7 +1410,6 @@ static void ub953_remove(struct i2c_client *client)
 	ub953_subdev_uninit(priv);
 
 	ub953_gpiochip_remove(priv);
-	mutex_destroy(&priv->reg_lock);
 }
 
 static const struct ub953_hw_data ds90ub953_hw = {

-- 
2.34.1