mac80211: Fixed netif_tx_wake_all_queues in IBSS mode

When ieee80211_offchannel_return is called, it needs to re-enabled TX
queues that have been stopped in ieee80211_offchannel_stop_beaconing or
ieee80211_offchannel_stop_station. It happens if we are doing a scan with an
IBSS interface. In this case, the interface stopped transmitting.
Signed-off-by: Benoit Papillault <benoit.papillault@free.fr>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/offchannel.c

@@ -153,9 +153,11 @@ void ieee80211_offchannel_return(struct ieee80211_local *local,
 		if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 			if (sdata->u.mgd.associated)
 				ieee80211_offchannel_ps_disable(sdata);
-			netif_tx_wake_all_queues(sdata->dev);
 		}
 
+		if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
+			netif_tx_wake_all_queues(sdata->dev);
+
 		/* re-enable beaconing */
 		if (enable_beaconing &&
 		    (sdata->vif.type == NL80211_IFTYPE_AP ||