mac80211: tear down of block ack sessions

This patch adds a clean tear down for all block ack sessions if interface
goes down or if a deauthentication is done.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 17 insertions, 7 deletions

diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 55b63712e48c..616ce10d2a38 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -386,7 +386,6 @@ static int ieee80211_stop(struct net_device *dev)
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_if_init_conf conf;
         struct sta_info *sta;
-        int i;
 
         /*
          * Stop TX on this interface first.
@@ -400,11 +399,7 @@ static int ieee80211_stop(struct net_device *dev)
 
         list_for_each_entry_rcu(sta, &local->sta_list, list) {
                 if (sta->sdata == sdata)
-                        for (i = 0; i <  STA_TID_NUM; i++)
-                                ieee80211_sta_stop_rx_ba_session(sdata->dev,
-                                                sta->addr, i,
-                                                WLAN_BACK_RECIPIENT,
-                                                WLAN_REASON_QSTA_LEAVE_QBSS);
+                        ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
         }
 
         rcu_read_unlock();
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 7f10ff5d4a0b..a6485f01b3c8 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -928,10 +928,12 @@ void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
                                   u16 agg_size, u16 timeout);
 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
                                 u16 initiator, u16 reason_code);
+
 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
                                 u16 tid, u16 initiator, u16 reason);
 void sta_rx_agg_session_timer_expired(unsigned long data);
 void sta_addba_resp_timer_expired(unsigned long data);
+void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
                             struct ieee802_11_elems *elems,
                             enum ieee80211_band band);
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 9beedb655896..fc73ca4abc08 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -467,8 +467,8 @@ static void ieee80211_set_associated(struct net_device *dev,
                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
                 ieee80211_sta_send_associnfo(dev, ifsta);
         } else {
+                ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
-
                 netif_carrier_off(dev);
                 ieee80211_reset_erp_info(dev);
                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
@@ -1518,6 +1518,19 @@ void sta_rx_agg_session_timer_expired(unsigned long data)
                                          WLAN_REASON_QSTA_TIMEOUT);
 }
 
+void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
+{
+        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+        int i;
+
+        for (i = 0; i <  STA_TID_NUM; i++) {
+                ieee80211_stop_tx_ba_session(&local->hw, addr, i,
+                                             WLAN_BACK_INITIATOR);
+                ieee80211_sta_stop_rx_ba_session(dev, addr, i,
+                                                 WLAN_BACK_RECIPIENT,
+                                                 WLAN_REASON_QSTA_LEAVE_QBSS);
+        }
+}
 
 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
                                    struct ieee80211_if_sta *ifsta,