[PATCH] staging: iio: frequency: ad9832: use guard(mutex) for locking

[Advaith Neelacantan]

Replace mutex lock/unlock pairs with

guard(mutex) for automatic scope-based locking.

Simplifies code by removing need to manually unlock.

Signed-off-by: Advaith Neelacantan <advaith.neelacantan@xxxxxxxxx>
---
 drivers/staging/iio/frequency/ad9832.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c
index b87ea1781..73c47a049 100644
--- a/drivers/staging/iio/frequency/ad9832.c
+++ b/drivers/staging/iio/frequency/ad9832.c
@@ -181,7 +181,7 @@ static ssize_t ad9832_write(struct device *dev, struct device_attribute *attr,
 	if (ret)
 		goto error_ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 	switch ((u32)this_attr->address) {
 	case AD9832_FREQ0HM:
 	case AD9832_FREQ1HM:
@@ -239,7 +239,6 @@ static ssize_t ad9832_write(struct device *dev, struct device_attribute *attr,
 	default:
 		ret = -ENODEV;
 	}
-	mutex_unlock(&st->lock);
 
 error_ret:
 	return ret ? ret : len;
-- 
2.51.0