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-rw-r--r--drivers/net/wireless/ath9k/xmit.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 17fd05e2f24..9de27c681b8 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -1652,7 +1652,9 @@ static int ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
int hdrlen;
__le16 fc;
- tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_KERNEL);
+ tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC);
+ if (unlikely(!tx_info_priv))
+ return -ENOMEM;
tx_info->rate_driver_data[0] = tx_info_priv;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
fc = hdr->frame_control;
@@ -1801,10 +1803,26 @@ int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb,
r = ath_tx_setup_buffer(sc, bf, skb, txctl);
if (unlikely(r)) {
- spin_lock_bh(&sc->sc_txbuflock);
+ struct ath_txq *txq = txctl->txq;
+
DPRINTF(sc, ATH_DBG_FATAL, "TX mem alloc failure\n");
+
+ /* upon ath_tx_processq() this TX queue will be resumed, we
+ * guarantee this will happen by knowing beforehand that
+ * we will at least have to run TX completionon one buffer
+ * on the queue */
+ spin_lock_bh(&txq->axq_lock);
+ if (ath_txq_depth(sc, txq->axq_qnum) > 1) {
+ ieee80211_stop_queue(sc->hw,
+ skb_get_queue_mapping(skb));
+ txq->stopped = 1;
+ }
+ spin_unlock_bh(&txq->axq_lock);
+
+ spin_lock_bh(&sc->sc_txbuflock);
list_add_tail(&bf->list, &sc->sc_txbuf);
spin_unlock_bh(&sc->sc_txbuflock);
+
return r;
}