tree 936323b1e9e9d2ef184f35fc32f5abd459b0572e
parent e20008ed931b9bdd90d1a3fd8c9ef9307547f4ed
author Octavian Purdila <octavian.purdila@intel.com> 1433509007 +0300
committer Jonathan Cameron <jic23@kernel.org> 1434894673 +0100

iio: allow userspace to flush the hwfifo with non-blocking reads

This patch changes the semantics of non-blocking reads so that a
hardware fifo flush is triggered if the available data in the device
buffer is less then the requested size.

This allows userspace to accurately generate hardware fifo flushes, by
doing a non-blocking read with a size greater then the sum of the
device buffer and hardware fifo size.

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>