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Commit 271a25f6 authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

staging:iio:accel:sca3000 Fix clearing of flag + setting of size of scan. 



Not clearing the stuff_to_read flag can lead to a false flag being set
on restarting the buffer if the data was not all read the previous time.

The size of the scan is needed to ensure the function
iio_buffer_read_first_n_outer actually tries to read the data.

This stuff has been broken for some time so not stable material.

Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
Reviewed-by: default avatarLars-Peter Clausen <lars@metafoo.de>
parent d1bf1a86

drivers/staging/iio/accel/sca3000.c

+13 −0
Original line number Diff line number Diff line
@@ -1491,6 +1491,19 @@ int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state) 
 **/

static int sca3000_hw_ring_preenable(struct iio_dev *indio_dev)

{

	/*

	 * Set stuff to read to indicate no data present.

	 * Need for cases where the interrupt had fired at the

	 * end of a cycle, but the data was never read.

	 */

	indio_dev->buffer->stufftoread = 0;

	/*

	 * Needed to ensure the core will actually read data

	 * from the device rather than assuming no channels

	 * are enabled.

	 */

	indio_dev->buffer->bytes_per_datum = 6;



	return __sca3000_hw_ring_state_set(indio_dev, 1);

}