diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
index 673f3807f001..e029589a668a 100644
--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -1217,8 +1217,7 @@ static int st_accel_write_raw(struct iio_dev *indio_dev,
 		int gain;
 
 		gain = val * 1000000 + val2;
-		err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
-		break;
+		return st_sensors_set_fullscale_by_gain(indio_dev, gain);
 	}
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		if (val2)
@@ -1230,8 +1229,6 @@ static int st_accel_write_raw(struct iio_dev *indio_dev,
 	default:
 		return -EINVAL;
 	}
-
-	return err;
 }
 
 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
index 62172e18d0d8..9b0cd314496e 100644
--- a/drivers/iio/gyro/st_gyro_core.c
+++ b/drivers/iio/gyro/st_gyro_core.c
@@ -410,8 +410,7 @@ static int st_gyro_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
-		err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
-		break;
+		return st_sensors_set_fullscale_by_gain(indio_dev, val2);
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		if (val2)
 			return -EINVAL;
@@ -420,10 +419,8 @@ static int st_gyro_write_raw(struct iio_dev *indio_dev,
 		mutex_unlock(&indio_dev->mlock);
 		return err;
 	default:
-		err = -EINVAL;
+		return -EINVAL;
 	}
-
-	return err;
 }
 
 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 74435f4a427d..78c407c96e17 100644
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -544,8 +544,7 @@ static int st_magn_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
-		err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
-		break;
+		return st_sensors_set_fullscale_by_gain(indio_dev, val2);
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		if (val2)
 			return -EINVAL;
@@ -554,10 +553,8 @@ static int st_magn_write_raw(struct iio_dev *indio_dev,
 		mutex_unlock(&indio_dev->mlock);
 		return err;
 	default:
-		err = -EINVAL;
+		return -EINVAL;
 	}
-
-	return err;
 }
 
 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();