iio: adc: ad7793: use iio helper function to guarantee direct mode

Replace the code that guarantees the device stays in direct mode with iio_device_claim_direct_mode() which does same. Signed-off-by: Alison Schofield <[email protected]> Cc: Daniel Baluta <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
oohal · Jul 24, 2016 · b4d4640 · b4d4640
1 parent 4d19c48
commit b4d4640
Showing 1 changed file with 4 additions and 6 deletions.
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
@@ -519,11 +519,9 @@ static int ad7793_write_raw(struct iio_dev *indio_dev,
 	int ret, i;
 	unsigned int tmp;
 
-	mutex_lock(&indio_dev->mlock);
-	if (iio_buffer_enabled(indio_dev)) {
-		mutex_unlock(&indio_dev->mlock);
-		return -EBUSY;
-	}
+	ret = iio_device_claim_direct_mode(indio_dev);
+	if (ret)
+		return ret;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
@@ -548,7 +546,7 @@ static int ad7793_write_raw(struct iio_dev *indio_dev,
 		ret = -EINVAL;
 	}
 
-	mutex_unlock(&indio_dev->mlock);
+	iio_device_release_direct_mode(indio_dev);
 	return ret;
 }