tree 42389f116a18a2ba8c3d7b20f52d591766bb9602
parent 26b36cfefaf2be98b225e3c1a399edb0daf52ddd
author Ming Lei <tom.leiming@gmail.com> 1273919140 +0800
committer John W. Linville <linville@tuxdriver.com> 1275677709 -0400

ath9k: fix dma sync in rx path

If buffer is to be accessed by cpu after dma is over, but
between dma mapping and dma unmapping, we should use
dma_sync_single_for_cpu to sync the buffer between cpu with
device. And dma_sync_single_for_device is used to let
device gain the buffer again.

v2: Felix pointed out dma_sync_single_for_device is needed to return
buffer to device if an unsuccessful status bit check is found.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>