tree 573142df787d9ccd52944695478546f543489504
parent 8f655dde240293f3b82313cae91c64ffd7b64c50
author Johannes Berg <johannes@sipsolutions.net> 1236848109 +0100
committer John W. Linville <linville@tuxdriver.com> 1238199176 -0400

nl80211: rework locking

When I added scanning to cfg80211, we got a lock dependency like this:
	rtnl --> cfg80211_mtx

nl80211, on the other hand, has the reverse lock dependency:
	cfg80211_mtx --> rtnl

which clearly is a bad idea. This patch reworks nl80211 to take these
two locks in the other order to fix the possible, and easily
triggerable, deadlock.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>