tree 8ebf015969ce66a6bfe303512e4b884c650012a3
parent 400f6bc852b92e85bb6bac72436d11647125da5d
author Michal Kazior <michal.kazior@tieto.com> 1394021648 +0100
committer Luciano Coelho <luciano.coelho@intel.com> 1395649110 +0200

mac80211: protect AP VLAN list with local->mtx

It was impossible to change chanctx of master AP
for AP VLANs because the copy function requires
RTNL which can't be simply taken in mac80211 code
due to possible deadlocks.

This is required for future chanctx reservation
that re-bind vifs to new chanctx. This requires
safe AP VLAN iteration without RTNL.

Now VLANs can be iterated while holding either
RTNL or local->mtx because the list is modified
while holding both of these locks.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>