linux-kernel - [PATCH v7 4/6] iio: proximity: rfd77402: Use devm-managed mutex initialization

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Message-Id: <20260127-b4-rfd77402_v5-v7-4-3e7f2d452da2@gmail.com>
Date: Tue, 27 Jan 2026 01:02:18 +0530
From: Shrikant Raskar via B4 Relay <devnull+raskar.shree97.gmail.com@...nel.org>
To: Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>
Cc: skhan@...uxfoundation.org, david.hunter.linux@...il.com, 
 raskar.shree97@...il.com, linux-iio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Andy Shevchenko <andriy.shevchenko@...el.com>
Subject: [PATCH v7 4/6] iio: proximity: rfd77402: Use devm-managed mutex
 initialization

From: Shrikant Raskar <raskar.shree97@...il.com>

Use devm_mutex_init() to tie the mutex lifetime to the device and
improve debugging when CONFIG_DEBUG_MUTEXES is enabled.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...el.com>
Signed-off-by: Shrikant Raskar <raskar.shree97@...il.com>
---
 drivers/iio/proximity/rfd77402.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/proximity/rfd77402.c b/drivers/iio/proximity/rfd77402.c
index 6b23fb3bfe1d..a374a7389c33 100644
--- a/drivers/iio/proximity/rfd77402.c
+++ b/drivers/iio/proximity/rfd77402.c
@@ -283,7 +283,10 @@ static int rfd77402_probe(struct i2c_client *client)
 
 	data = iio_priv(indio_dev);
 	data->client = client;
-	mutex_init(&data->lock);
+
+	ret = devm_mutex_init(&client->dev, &data->lock);
+	if (ret)
+		return ret;
 
 	indio_dev->info = &rfd77402_info;
 	indio_dev->channels = rfd77402_channels;

-- 
2.43.0