From: Ming Lei <tom.leiming@gmail.com>
Date: Sat, 15 May 2010 10:25:40 +0000 (+0800)
Subject: ath9k: fix dma sync in rx path
X-Git-Tag: v2.6.36-rc1~571^2~615^2~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce9426d1908001fb2f7b0152fbe4184bbc0c7b68;p=pandora-kernel.git

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>
---

Reading git-diff-tree failed