From: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date: Wed, 29 Apr 2009 10:41:24 +0000 (+0100)
Subject: mac80211: fix modprobe deadlock by not calling wep_init under rtnl_lock
X-Git-Tag: v2.6.30-rc5~39^2~24^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4c4a9a1bce1912ed5681251f0037fd4f2364a3e;p=pandora-kernel.git

mac80211: fix modprobe deadlock by not calling wep_init under rtnl_lock

- ieee80211_wep_init(), which is called with rtnl_lock held, blocks in
   request_module() [waiting for modprobe to load a crypto module].

 - modprobe blocks in a call to flush_workqueue(), when it closes a TTY
   [presumably when it exits].

 - The workqueue item linkwatch_event() blocks on rtnl_lock.

There's no reason for wep_init() to be called with rtnl_lock held, so
just move it outside the critical section.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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