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

Use devm_mutex_init() to tie the mutex lifetime to the device and
simplify resource lifetime management.

Signed-off-by: Shrikant Raskar <raskar.shree97@gmail.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 716c9330b14e..fce85f783ab4 100644
--- a/drivers/iio/proximity/rfd77402.c
+++ b/drivers/iio/proximity/rfd77402.c
@@ -279,7 +279,10 @@ 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

On Wed, Jan 21, 2026 at 02:05:43AM +0530, Shrikant Raskar via B4 Relay wrote:

> Use devm_mutex_init() to tie the mutex lifetime to the device and
> simplify resource lifetime management.

I believe it's currently more about debugging mutexes.

See how other commits in IIO look like

  commit 6e43c10675d876a5fb71e57a9bcca9533fccccd9
  Author: Nuno Sá <nuno.sa@analog.com>
  Date:   Tue Nov 4 15:35:13 2025 +0000

    iio: dac: ad5446: Make use of devm_mutex_init()

    Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.

With the commit message being rewritten,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>

-- 
With Best Regards,
Andy Shevchenko