iwlagn: update rate scaling with BA notifications

In the current code, the rate scaling isn't fed with
statistics from the BA notifications.

This is since my patch:

	iwlagn: reclaim the packets in transport layer

Fix that.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-agn-tx.c

@@ -342,6 +342,8 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 
 	iwl_update_stats(priv, true, fc, len);
 
+	memset(&info->status, 0, sizeof(info->status));
+
 	info->driver_data[0] = ctx;
 	info->driver_data[1] = dev_cmd;
 
@@ -580,6 +582,9 @@ static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 		IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 	}
 
+	if (tx_resp->frame_count == 1)
+		return;
+
 	/* Construct bit-map of pending frames within Tx window */
 	for (i = 0; i < tx_resp->frame_count; i++) {
 		u16 fstatus = le16_to_cpu(frame_status[i].status);
@@ -938,7 +943,10 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 		else
 			WARN_ON_ONCE(1);
 
-		if (freed == 0) {
+		info = IEEE80211_SKB_CB(skb);
+		kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
+
+		if (freed == 1) {
 			/* this is the first skb we deliver in this batch */
 			/* put the rate scaling data there */
 			info = IEEE80211_SKB_CB(skb);
@@ -951,9 +959,6 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 						    info);
 		}
 
-		info = IEEE80211_SKB_CB(skb);
-		kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
-
 		ieee80211_tx_status_irqsafe(priv->hw, skb);
 	}