diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 640afab..baaa860 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -541,6 +541,9 @@
 
 		ieee80211_adjust_monitor_flags(sdata, 1);
 		ieee80211_configure_filter(local);
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
 
 		netif_carrier_on(dev);
 		break;
@@ -812,6 +815,9 @@
 
 		ieee80211_adjust_monitor_flags(sdata, -1);
 		ieee80211_configure_filter(local);
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
 		break;
 	case NL80211_IFTYPE_P2P_DEVICE:
 		/* relies on synchronize_rcu() below */