diff options
| -rw-r--r-- | drivers/net/wireless/ath9k/xmit.c | 22 |
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; } |