iwlwifi: mvm: protect TDLS discovery session

Use the new mac80211 callback to protect a TDLS discovery session so we
can hear the discovery-response packet.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/mac80211.c

@@ -2017,6 +2017,18 @@ static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
 	mutex_unlock(&mvm->mutex);
 }
 
+static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
+						  struct ieee80211_vif *vif)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
+
+	mutex_lock(&mvm->mutex);
+	/* Protect the session to hear the TDLS setup response on the channel */
+	iwl_mvm_protect_session(mvm, vif, duration, duration, 100);
+	mutex_unlock(&mvm->mutex);
+}
+
 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
 					struct ieee80211_vif *vif,
 					struct cfg80211_sched_scan_request *req,
@@ -2781,6 +2793,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 	.sta_rc_update = iwl_mvm_sta_rc_update,
 	.conf_tx = iwl_mvm_mac_conf_tx,
 	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
+	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
 	.flush = iwl_mvm_mac_flush,
 	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
 	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,