tree 0b28807104e80926d33eec8634dd94c5561e64ab
parent 6774889314ba507483e63c014fcb81adfc127202
author Johannes Berg <johannes.berg@intel.com> 1286268107 +0200
committer John W. Linville <linville@tuxdriver.com> 1286300271 -0400

mac80211: fix deadlock with multiple interfaces

The locking around ieee80211_recalc_smps is
buggy -- it cannot acquire another interface's
mutex while the iflist mutex is held because
another code path could be holding the iface
mutex and trying to acquire the iflist mutex.

But the locking is also unnecessary, we only
check "ifmgd->associated" as a bool, and don't
use the pointer (in check_mgd_smps).

Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>