tree 6f6ba84e24622bc0c15e81b3510e28bf234a87a9
parent 1e450285281bdf766272c181ecd43d4f2f0711ce
author Luis R. Rodriguez <lrodriguez@atheros.com> 1287616024 -0700
committer John W. Linville <linville@tuxdriver.com> 1288208474 -0400

ath9k: add locking for starting the PCU on RX

There was some locking for starting some parts of
RX but not for starting the PCU. Include this otherwise
we can content against stopping the PCU.

This can potentially lead to races against different
buffers on the PCU which can lead to to the DMA RX
engine writing to buffers which are already freed.

This is part of a series that will help resolve the bug:

https://bugzilla.kernel.org/show_bug.cgi?id=14624

For more details about this issue refer to:

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

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