1 files changed, 24 insertions, 18 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 5b79d552780a..748387d45bc0 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -803,8 +803,12 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
 
         /* after reinitialize QoS TX queues setting to default,
          * disable QoS at all */
-        local->hw.conf.flags &= ~IEEE80211_CONF_QOS;
-        drv_config(local, IEEE80211_CONF_CHANGE_QOS);
+
+        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);
+        }
 }
 
 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
@@ -1138,18 +1142,6 @@ int ieee80211_reconfig(struct ieee80211_local *local)
         }
         mutex_unlock(&local->sta_mtx);
 
-        /* Clear Suspend state so that ADDBA requests can be processed */
-
-        rcu_read_lock();
-
-        if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
-                list_for_each_entry_rcu(sta, &local->sta_list, list) {
-                        clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
-                }
-        }
-
-        rcu_read_unlock();
-
         /* setup RTS threshold */
         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
 
@@ -1173,7 +1165,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
                           BSS_CHANGED_BASIC_RATES |
                           BSS_CHANGED_BEACON_INT |
                           BSS_CHANGED_BSSID |
-                          BSS_CHANGED_CQM;
+                          BSS_CHANGED_CQM |
+                          BSS_CHANGED_QOS;
 
                 switch (sdata->vif.type) {
                 case NL80211_IFTYPE_STATION:
@@ -1202,13 +1195,26 @@ int ieee80211_reconfig(struct ieee80211_local *local)
                 }
         }
 
-        rcu_read_lock();
+        /*
+         * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
+         * sessions can be established after a resume.
+         *
+         * Also tear down aggregation sessions since reconfiguring
+         * them in a hardware restart scenario is not easily done
+         * right now, and the hardware will have lost information
+         * about the sessions, but we and the AP still think they
+         * are active. This is really a workaround though.
+         */
         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
-                list_for_each_entry_rcu(sta, &local->sta_list, list) {
+                mutex_lock(&local->sta_mtx);
+
+                list_for_each_entry(sta, &local->sta_list, list) {
                         ieee80211_sta_tear_down_BA_sessions(sta);
+                        clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
                 }
+
+                mutex_unlock(&local->sta_mtx);
         }
-        rcu_read_unlock();
 
         /* add back keys */
         list_for_each_entry(sdata, &local->interfaces, list)