[PATCH v3 3/3] iio: accel: adxl372: convert to guard(mutex)

[Rajveer Chaudhari <rajveer.chaudhari.linux@gmail.com>]

Replace manual mutex_lock/mutex_unlock pair with guard(mutex) in
adxl372_write_threshold_value(). Remove goto label and return
directly on error path.

v3: Return directly from error path without goto.
v2: Split into separate patch per driver.

Signed-off-by: Rajveer Chaudhari <rajveer.chaudhari.linux@gmail.com>
---
 drivers/iio/accel/adxl372.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index 28a8793a53b6..340433782cf2 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -7,6 +7,7 @@
 
 #include <linux/bitfield.h>
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/module.h>
@@ -334,20 +335,15 @@ static ssize_t adxl372_write_threshold_value(struct iio_dev *indio_dev, unsigned
 					     u16 threshold)
 {
 	struct adxl372_state *st = iio_priv(indio_dev);
-	int ret;
 
-	mutex_lock(&st->threshold_m);
-	ret = regmap_write(st->regmap, addr, ADXL372_THRESH_VAL_H_SEL(threshold));
+	guard(mutex)(&st->threshold_m);
+	
+	int ret = regmap_write(st->regmap, addr, ADXL372_THRESH_VAL_H_SEL(threshold));
 	if (ret < 0)
-		goto unlock;
+		return ret;
 
-	ret = regmap_update_bits(st->regmap, addr + 1, GENMASK(7, 5),
+	return regmap_update_bits(st->regmap, addr + 1, GENMASK(7, 5),
 				 ADXL372_THRESH_VAL_L_SEL(threshold) << 5);
-
-unlock:
-	mutex_unlock(&st->threshold_m);
-
-	return ret;
 }
 
 static int adxl372_read_axis(struct adxl372_state *st, u8 addr)
-- 
2.53.0