tree e2ba955bb3a1ff3fc6fa88423535201d2f07b168
parent 23e370989c3fe6b9b2062d9d511feda800434de3
author Arik Nemtsov <arik@wizery.com> 1425193809 +0200
committer Johannes Berg <johannes.berg@intel.com> 1425461650 +0100

mac80211: allow TDLS setup code to take wdev lock

TDLS off-channel can be allowed in channels marked with GO_CONCURRENT,
provided the device is connected to an AP on the same UNII.
When relaxing the NO-IR requirements for TDLS, we might hit flows in
cfg80211_reg_can_beacon that acquire the wdev lock. Take some measures
to allow this during TDLS setup.
Acquire the RCU read lock later in the flow that invokes
cfg80211_reg_can_beacon.
Avoid taking local->mtx when preparing the setup packet to avoid
circular deadlocks with mac80211 code that is invoked with wdev-mtx
held.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>