diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 93e5a716f9e125b719394a7c36e8b81799ba5fe0..8a0485e697470d4de4bc3dac31788e9e0c7ff522 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -569,19 +569,14 @@ static const struct iio_info ad5933_info = {
 static int ad5933_ring_preenable(struct iio_dev *indio_dev)
 {
 	struct ad5933_state *st = iio_priv(indio_dev);
-	size_t d_size;
 	int ret;
 
 	if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		return -EINVAL;
 
-	d_size = bitmap_weight(indio_dev->active_scan_mask,
-			       indio_dev->masklength) *
-		 ad5933_channels[1].scan_type.storagebits / 8;
-
-	if (indio_dev->buffer->access->set_bytes_per_datum)
-		indio_dev->buffer->access->
-			set_bytes_per_datum(indio_dev->buffer, d_size);
+	ret = iio_sw_buffer_preenable(indio_dev);
+	if (ret < 0)
+		return ret;
 
 	ret = ad5933_reset(st);
 	if (ret < 0)