1 files changed, 45 insertions, 6 deletions

diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 3153c19..38a7972 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -157,6 +157,15 @@ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 	}
 }
 
+/*
+ * Use a static threshold for now, best value to be determined
+ * by testing ...
+ * Should it depend on:
+ *  - on # of retransmissions
+ *  - current throughput (higher value for higher tpt)?
+ */
+#define STA_LOST_PKT_THRESHOLD	50
+
 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
 	struct sk_buff *skb2;
@@ -173,6 +182,7 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 	int retry_count = -1, i;
 	int rates_idx = -1;
 	bool send_to_cooked;
+	bool acked;
 
 	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 		/* the HW cannot have attempted that rate */
@@ -198,8 +208,8 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 		if (memcmp(hdr->addr2, sta->sdata->vif.addr, ETH_ALEN))
 			continue;
 
-		if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
-		    test_sta_flags(sta, WLAN_STA_PS_STA)) {
+		acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
+		if (!acked && test_sta_flags(sta, WLAN_STA_PS_STA)) {
 			/*
 			 * The STA is in power save mode, so assume
 			 * that this TX packet failed because of that.
@@ -231,7 +241,7 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 			rcu_read_unlock();
 			return;
 		} else {
-			if (!(info->flags & IEEE80211_TX_STAT_ACK))
+			if (!acked)
 				sta->tx_retry_failed++;
 			sta->tx_retry_count += retry_count;
 		}
@@ -240,9 +250,25 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 		if (ieee80211_vif_is_mesh(&sta->sdata->vif))
 			ieee80211s_update_metric(local, sta, skb);
 
-		if (!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
-		    (info->flags & IEEE80211_TX_STAT_ACK))
+		if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
 			ieee80211_frame_acked(sta, skb);
+
+		if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
+		    (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
+			ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked);
+
+		if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
+			if (info->flags & IEEE80211_TX_STAT_ACK) {
+				if (sta->lost_packets)
+					sta->lost_packets = 0;
+			} else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) {
+				cfg80211_cqm_pktloss_notify(sta->sdata->dev,
+							    sta->sta.addr,
+							    sta->lost_packets,
+							    GFP_ATOMIC);
+				sta->lost_packets = 0;
+			}
+		}
 	}
 
 	rcu_read_unlock();
@@ -295,10 +321,23 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 					msecs_to_jiffies(10));
 	}
 
-	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX)
+	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
+		struct ieee80211_work *wk;
+
+		rcu_read_lock();
+		list_for_each_entry_rcu(wk, &local->work_list, list) {
+			if (wk->type != IEEE80211_WORK_OFFCHANNEL_TX)
+				continue;
+			if (wk->offchan_tx.frame != skb)
+				continue;
+			wk->offchan_tx.frame = NULL;
+			break;
+		}
+		rcu_read_unlock();
 		cfg80211_mgmt_tx_status(
 			skb->dev, (unsigned long) skb, skb->data, skb->len,
 			!!(info->flags & IEEE80211_TX_STAT_ACK), GFP_ATOMIC);
+	}
 
 	/* this was a transmitted frame, but now we want to reuse it */
 	skb_orphan(skb);