1 files changed, 25 insertions, 8 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index f18cfd72787..cc756e93e6c 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -182,10 +182,11 @@ static int ieee80211_open(struct net_device *dev)
 {
 	struct ieee80211_sub_if_data *sdata, *nsdata;
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct sta_info *sta;
 	struct ieee80211_if_init_conf conf;
+	u32 changed = 0;
 	int res;
 	bool need_hw_reconfig = 0;
-	struct sta_info *sta;
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
@@ -329,7 +330,8 @@ static int ieee80211_open(struct net_device *dev)
 			goto err_stop;
 
 		ieee80211_if_config(dev);
-		ieee80211_reset_erp_info(dev);
+		changed |= ieee80211_reset_erp_info(dev);
+		ieee80211_bss_info_change_notify(sdata, changed);
 		ieee80211_enable_keys(sdata);
 
 		if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
@@ -1190,15 +1192,13 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 					     changed);
 }
 
-void ieee80211_reset_erp_info(struct net_device *dev)
+u32 ieee80211_reset_erp_info(struct net_device *dev)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
 	sdata->bss_conf.use_cts_prot = 0;
 	sdata->bss_conf.use_short_preamble = 0;
-	ieee80211_bss_info_change_notify(sdata,
-					 BSS_CHANGED_ERP_CTS_PROT |
-					 BSS_CHANGED_ERP_PREAMBLE);
+	return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
 }
 
 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
@@ -1404,14 +1404,15 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 	struct ieee80211_local *local = hw_to_local(hw);
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	u16 frag, type;
+	__le16 fc;
 	struct ieee80211_tx_status_rtap_hdr *rthdr;
 	struct ieee80211_sub_if_data *sdata;
 	struct net_device *prev_dev = NULL;
+	struct sta_info *sta;
 
 	rcu_read_lock();
 
 	if (info->status.excessive_retries) {
-		struct sta_info *sta;
 		sta = sta_info_get(local, hdr->addr1);
 		if (sta) {
 			if (test_sta_flags(sta, WLAN_STA_PS)) {
@@ -1426,8 +1427,24 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 		}
 	}
 
+	fc = hdr->frame_control;
+
+	if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
+	    (ieee80211_is_data_qos(fc))) {
+		u16 tid, ssn;
+		u8 *qc;
+		sta = sta_info_get(local, hdr->addr1);
+		if (sta) {
+			qc = ieee80211_get_qos_ctl(hdr);
+			tid = qc[0] & 0xf;
+			ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
+						& IEEE80211_SCTL_SEQ);
+			ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
+					   tid, ssn);
+		}
+	}
+
 	if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
-		struct sta_info *sta;
 		sta = sta_info_get(local, hdr->addr1);
 		if (sta) {
 			ieee80211_handle_filtered_frame(local, sta, skb);