ath9k: improve ath_tx_aggr_stop to avoid TID stuck in cleanup state

When tx agg is being stopped TID is flushed using ath_tx_flush_tid. It
is possible that ath_tx_flush_tid completelly flushes TID (if all
packets in this TID have already been retried). If this happened
ath_tx_aggr_stop would leave TID in cleanup state permanently.
Fix this by making ath_tx_flush_tid remove AGGR_ADDBA_COMPLETE and
AGGR_CLEANUP flags from TID status if TID is empty.

Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 55d077e..80639e3 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -179,6 +179,11 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
                spin_lock_bh(&txq->axq_lock);
        }
 
+       if (tid->baw_head == tid->baw_tail) {
+               tid->state &= ~AGGR_ADDBA_COMPLETE;
+               tid->state &= ~AGGR_CLEANUP;
+       }
+
        spin_unlock_bh(&txq->axq_lock);
 }
 
@@ -556,15 +561,9 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                spin_unlock_bh(&txq->axq_lock);
        }
 
-       if (tid->state & AGGR_CLEANUP) {
+       if (tid->state & AGGR_CLEANUP)
                ath_tx_flush_tid(sc, tid);
 
-               if (tid->baw_head == tid->baw_tail) {
-                       tid->state &= ~AGGR_ADDBA_COMPLETE;
-                       tid->state &= ~AGGR_CLEANUP;
-               }
-       }
-
        rcu_read_unlock();
 
        if (needreset) {