mac80211: combine QoS with other BSS changes

When associating and particularly when disassociating
there's no need to notify the driver about changes
with multiple calls to bss_info_changed, we should
combine the QoS enabling/disabling into the same call
as otherwise the driver could get confused about QoS
suddenly getting disabled while connected.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index f6e4cef..0a5ad95 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -737,7 +737,8 @@
 	ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
 }
 
-void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
+void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
+			       bool bss_notify)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_tx_queue_params qparam;
@@ -807,7 +808,9 @@
 	if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
 		sdata->vif.bss_conf.qos =
 			sdata->vif.type != NL80211_IFTYPE_STATION;
-		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
+		if (bss_notify)
+			ieee80211_bss_info_change_notify(sdata,
+							 BSS_CHANGED_QOS);
 	}
 }
 
@@ -829,7 +832,7 @@
 	else
 		sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 
-	ieee80211_set_wmm_default(sdata);
+	ieee80211_set_wmm_default(sdata, true);
 }
 
 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,