By using separate TX and RX bounce buffers, we avoid potential cache
flush and invalidation sequence issue that may be encountered when a
single bounce buffer is shared between TX and RX
Signed-off-by: NRay Jui <rjui@broadcom.com>
Reviewed-by: NJD (Jiandong) Zheng <jdzheng@broadcom.com>
Signed-off-by: NMark Brown <broonie@kernel.org>