1 files changed, 26 insertions, 0 deletions

diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 3153c19893b8..bed7e32ed908 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -155,8 +155,21 @@ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 
                 ieee80211_queue_work(&local->hw, &local->recalc_smps);
         }
+
+        if ((sdata->vif.type == NL80211_IFTYPE_STATION) &&
+            (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
+                ieee80211_sta_tx_notify(sdata, (void *) skb->data);
 }
 
+/*
+ * 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;
@@ -243,6 +256,19 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
                 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
                     (info->flags & IEEE80211_TX_STAT_ACK))
                         ieee80211_frame_acked(sta, skb);
+
+                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();