staging:iio: add caching of the number of bytes in a scan.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/iio/industrialio-buffer.c b/drivers/staging/iio/industrialio-buffer.c
index 0359161..f6cb0ab 100644
--- a/drivers/staging/iio/industrialio-buffer.c
+++ b/drivers/staging/iio/industrialio-buffer.c
@@ -536,13 +536,13 @@
int iio_sw_buffer_preenable(struct iio_dev *indio_dev)
{
struct iio_buffer *buffer = indio_dev->buffer;
- unsigned bytes;
dev_dbg(&indio_dev->dev, "%s\n", __func__);
/* How much space will the demuxed element take? */
- bytes = iio_compute_scan_bytes(indio_dev, buffer->scan_mask,
+ indio_dev->scan_bytes =
+ iio_compute_scan_bytes(indio_dev, buffer->scan_mask,
buffer->scan_timestamp);
- buffer->access->set_bytes_per_datum(buffer, bytes);
+ buffer->access->set_bytes_per_datum(buffer, indio_dev->scan_bytes);
/* What scan mask do we actually have ?*/
if (indio_dev->available_scan_masks)