carl9170: fix tx_ampdu_upload counter

tx_ampdu_upload was not decreased when an a-MPDU
frame had to be kicked out from the tx_pending
queues.

This broke ampdu aggregation, because the scheduler
waits until tx_ampdu_upload drops to zero, before
making the next aggregate.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index d28b4ff8d281..a8b0cec78b32 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -230,8 +230,15 @@ static void carl9170_flush(struct ar9170 *ar, bool drop_queued)
                 for (i = 0; i < ar->hw->queues; i++) {
                         struct sk_buff *skb;
 
-                        while ((skb = skb_dequeue(&ar->tx_pending[i])))
+                        while ((skb = skb_dequeue(&ar->tx_pending[i]))) {
+                                struct ieee80211_tx_info *info;
+
+                                info = IEEE80211_SKB_CB(skb);
+                                if (info->flags & IEEE80211_TX_CTL_AMPDU)
+                                        atomic_dec(&ar->tx_ampdu_upload);
+
                                 carl9170_tx_status(ar, skb, false);
+                        }
                 }
         }
 
@@ -1462,6 +1469,7 @@ static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
                         skb_queue_walk_safe(&ar->tx_pending[i], skb, tmp) {
                                 struct _carl9170_tx_superframe *super;
                                 struct ieee80211_hdr *hdr;
+                                struct ieee80211_tx_info *info;
 
                                 super = (void *) skb->data;
                                 hdr = (void *) super->frame_data;
@@ -1470,6 +1478,11 @@ static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
                                         continue;
 
                                 __skb_unlink(skb, &ar->tx_pending[i]);
+
+                                info = IEEE80211_SKB_CB(skb);
+                                if (info->flags & IEEE80211_TX_CTL_AMPDU)
+                                        atomic_dec(&ar->tx_ampdu_upload);
+
                                 carl9170_tx_status(ar, skb, false);
                         }
                         spin_unlock_bh(&ar->tx_pending[i].lock);