From: Luis R. Rodriguez <lrodriguez@atheros.com>
Date: Tue, 26 Oct 2010 22:27:25 +0000 (-0700)
Subject: ath9k: content DMA start / stop through the PCU lock
X-Git-Tag: v2.6.38-rc1~476^2~558^2~102
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6a6733f256f18cbcf4875e13f59eedb593b755a8;p=pandora-kernel.git

ath9k: content DMA start / stop through the PCU lock

This helps align resets / RX enable & disable / TX stop / start.
Locking around the PCU is important to ensure the hardware doesn't
get stale data when working with DMA'able data.

This is part of a series of patches which fix stopping
TX DMA completley when requested on the driver.
For more details about this issue refer to this thread:

http://marc.info/?l=linux-wireless&m=128629803703756&w=2

Tested-by:  Ben Greear <greearb@candelatech.com>
Cc: Kyungwan Nam <kyungwan.nam@atheros.com>
Cc: stable@kernel.org
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

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