From: Christian Lamparter <chunkeey@googlemail.com>
Date: Thu, 30 Dec 2010 16:25:29 +0000 (+0100)
Subject: mac80211: serialize rx path workers
X-Git-Tag: v2.6.38-rc1~476^2~14^2~3^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24a8fdad35835e8d71f7c4b978a246fafed2e7b4;p=pandora-kernel.git

mac80211: serialize rx path workers

This patch addresses the issue of serialization between
the main rx path and various reorder release timers.

<http://www.spinics.net/lists/linux-wireless/msg57214.html>

It converts the previously local "frames" queue into
a global rx queue [rx_skb_queue]. This way, everyone
(be it the main rx-path or some reorder release timeout)
can add frames to it.

Only one active rx handler worker [ieee80211_rx_handlers]
is needed. All other threads which have lost the race of
"runnning_rx_handler" can now simply "return", knowing that
the thread who had the "edge" will also take care of their
workload.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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