tree f6bebb064e2306faf64d767c875ea734aa8a492c
parent 531e7ab5d1781010ba82e49aef82e0ca74edd21a
author Luis R. Rodriguez <mcgrof@do-not-panic.com> 1398752085 +0530
committer Padma, Santhosh Kumar <skpadma@codeaurora.org> 1398766614 +0530

cfg80211: fix possible circular lock on reg_regdb_search()

When call_crda() is called we kick off a witch hunt search
for the same regulatory domain on our internal regulatory
database and that work gets kicked off on a workqueue, this
is done while the cfg80211_mutex is held. If that workqueue
kicks off it will first lock reg_regdb_search_mutex and
later cfg80211_mutex but to ensure two CPUs will not contend
against cfg80211_mutex the right thing to do is to have the
reg_regdb_search() wait until the cfg80211_mutex is let go.

Change-Id: Ibb44a5325876d77f1549d3938d56d8fbd051b9ba
CRs-Fixed: 655287
Signed-off-by: Santhosh Kumar Padma <skpadma@codeaurora.org>