mac80211: report tx status for dropped frames, should fix some remaining stability issues

Backport of r33991

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33992 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 133 insertions, 38 deletions

diff --git a/package/mac80211/patches/300-pending_work.patch b/package/mac80211/patches/300-pending_work.patch
index 6f35a07be..56f5af959 100644
--- a/package/mac80211/patches/300-pending_work.patch
+++ b/package/mac80211/patches/300-pending_work.patch
@@ -257,14 +257,90 @@
  	WLAN_STA_BLOCK_BA,
 --- a/net/mac80211/status.c
 +++ b/net/mac80211/status.c
-@@ -517,29 +517,41 @@ void ieee80211_tx_status(struct ieee8021
+@@ -324,6 +324,75 @@ static void ieee80211_add_tx_radiotap_he
  
- 	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
- 		u64 cookie = (unsigned long)skb;
-+		bool found = false;
+ }
+ 
++static void ieee80211_report_used_skb(struct ieee80211_local *local,
++				      struct sk_buff *skb, bool dropped)
++{
++	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
++	struct ieee80211_hdr *hdr = (void *)skb->data;
++	bool acked = info->flags & IEEE80211_TX_STAT_ACK;
++
++	if (dropped)
++		acked = false;
++
++	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
++		struct ieee80211_sub_if_data *sdata = NULL;
++		struct ieee80211_sub_if_data *iter_sdata;
++		u64 cookie = (unsigned long)skb;
++
++		rcu_read_lock();
++
++		if (skb->dev) {
++			list_for_each_entry_rcu(iter_sdata, &local->interfaces,
++						list) {
++				if (!iter_sdata->dev)
++					continue;
++
++				if (skb->dev == iter_sdata->dev) {
++					sdata = iter_sdata;
++					break;
++				}
++			}
++		} else {
++			sdata = rcu_dereference(local->p2p_sdata);
++		}
 +
- 		acked = info->flags & IEEE80211_TX_STAT_ACK;
++		if (!sdata)
++			skb->dev = NULL;
++		else if (ieee80211_is_nullfunc(hdr->frame_control) ||
++			 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
++			cfg80211_probe_status(sdata->dev, hdr->addr1,
++					      cookie, acked, GFP_ATOMIC);
++		} else {
++			cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data,
++						skb->len, acked, GFP_ATOMIC);
++		}
++
++		rcu_read_unlock();
++	}
++
++	if (unlikely(info->ack_frame_id)) {
++		struct sk_buff *ack_skb;
++		unsigned long flags;
++
++		spin_lock_irqsave(&local->ack_status_lock, flags);
++		ack_skb = idr_find(&local->ack_status_frames,
++				   info->ack_frame_id);
++		if (ack_skb)
++			idr_remove(&local->ack_status_frames,
++				   info->ack_frame_id);
++		spin_unlock_irqrestore(&local->ack_status_lock, flags);
++
++		if (ack_skb) {
++			if (!dropped) {
++				/* consumes ack_skb */
++				skb_complete_wifi_ack(ack_skb, acked);
++			} else {
++				dev_kfree_skb_any(ack_skb);
++			}
++		}
++	}
++}
++
+ /*
+  * Use a static threshold for now, best value to be determined
+  * by testing ...
+@@ -515,50 +584,7 @@ void ieee80211_tx_status(struct ieee8021
+ 					msecs_to_jiffies(10));
+ 	}
  
+-	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
+-		u64 cookie = (unsigned long)skb;
+-		acked = info->flags & IEEE80211_TX_STAT_ACK;
+-
 -		if (ieee80211_is_nullfunc(hdr->frame_control) ||
 -		    ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 -			cfg80211_probe_status(skb->dev, hdr->addr1,
@@ -275,13 +351,9 @@
 -				skb->len, acked, GFP_ATOMIC);
 -		} else {
 -			struct ieee80211_sub_if_data *p2p_sdata;
-+		rcu_read_lock();
- 
+-
 -			rcu_read_lock();
-+		list_for_each_entry_rcu(sdata, &local->interfaces, list) {
-+			if (!sdata->dev)
-+				continue;
- 
+-
 -			p2p_sdata = rcu_dereference(local->p2p_sdata);
 -			if (p2p_sdata) {
 -				cfg80211_mgmt_tx_status(
@@ -289,34 +361,57 @@
 -					skb->len, acked, GFP_ATOMIC);
 -			}
 -			rcu_read_unlock();
-+			if (skb->dev != sdata->dev)
-+				continue;
-+
-+			found = true;
-+			break;
- 		}
-+
-+		if (!skb->dev) {
-+			sdata = rcu_dereference(local->p2p_sdata);
-+			if (sdata)
-+				found = true;
-+		}
-+
-+		if (!found)
-+			skb->dev = NULL;
-+		else if (ieee80211_is_nullfunc(hdr->frame_control) ||
-+			 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
-+			cfg80211_probe_status(sdata->dev, hdr->addr1,
-+					      cookie, acked, GFP_ATOMIC);
-+		} else {
-+			cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data,
-+						skb->len, acked, GFP_ATOMIC);
-+		}
-+
-+		rcu_read_unlock();
- 	}
+-		}
+-	}
+-
+-	if (unlikely(info->ack_frame_id)) {
+-		struct sk_buff *ack_skb;
+-		unsigned long flags;
+-
+-		spin_lock_irqsave(&local->ack_status_lock, flags);
+-		ack_skb = idr_find(&local->ack_status_frames,
+-				   info->ack_frame_id);
+-		if (ack_skb)
+-			idr_remove(&local->ack_status_frames,
+-				   info->ack_frame_id);
+-		spin_unlock_irqrestore(&local->ack_status_lock, flags);
+-
+-		/* consumes ack_skb */
+-		if (ack_skb)
+-			skb_complete_wifi_ack(ack_skb,
+-				info->flags & IEEE80211_TX_STAT_ACK);
+-	}
++	ieee80211_report_used_skb(local, skb, false);
+ 
+ 	/* this was a transmitted frame, but now we want to reuse it */
+ 	skb_orphan(skb);
+@@ -634,25 +660,8 @@ EXPORT_SYMBOL(ieee80211_report_low_ack);
+ void ieee80211_free_txskb(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);
+-
+-	if (unlikely(info->ack_frame_id)) {
+-		struct sk_buff *ack_skb;
+-		unsigned long flags;
+-
+-		spin_lock_irqsave(&local->ack_status_lock, flags);
+-		ack_skb = idr_find(&local->ack_status_frames,
+-				   info->ack_frame_id);
+-		if (ack_skb)
+-			idr_remove(&local->ack_status_frames,
+-				   info->ack_frame_id);
+-		spin_unlock_irqrestore(&local->ack_status_lock, flags);
+-
+-		/* consumes ack_skb */
+-		if (ack_skb)
+-			dev_kfree_skb_any(ack_skb);
+-	}
  
- 	if (unlikely(info->ack_frame_id)) {
++	ieee80211_report_used_skb(local, skb, true);
+ 	dev_kfree_skb_any(skb);
+ }
+ EXPORT_SYMBOL(ieee80211_free_txskb);
 --- a/drivers/net/wireless/p54/main.c
 +++ b/drivers/net/wireless/p54/main.c
 @@ -139,6 +139,7 @@ static int p54_beacon_format_ie_tim(stru