iio: proximity: rfd77402: Use devm-managed mutex initialization

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@intel.com>
Signed-off-by: Shrikant Raskar <raskar.shree97@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/proximity/rfd77402.c b/drivers/iio/proximity/rfd77402.c
index 3d564366327013779d7e0d01549e24b0075876ba..eec336bed424bfe9aff6608bb7ace8ee607dc518 100644 (file)
--- a/drivers/iio/proximity/rfd77402.c
+++ b/drivers/iio/proximity/rfd77402.c
@@ -287,7 +287,10 @@ 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;