diff options
Diffstat (limited to 'drivers/net/tg3.c')
| -rw-r--r-- | drivers/net/tg3.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 542d4c3a10e5..b2ddd4522a87 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -3759,14 +3759,11 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) len = skb_headlen(skb); - /* No BH disabling for tx_lock here. We are running in BH disabled - * context and TX reclaim runs via tp->poll inside of a software + /* We are running in BH disabled context with netif_tx_lock + * and TX reclaim runs via tp->poll inside of a software * interrupt. Furthermore, IRQ processing runs lockless so we have * no IRQ context deadlocks to worry about either. Rejoice! */ - if (!spin_trylock(&tp->tx_lock)) - return NETDEV_TX_LOCKED; - if (unlikely(TX_BUFFS_AVAIL(tp) <= (skb_shinfo(skb)->nr_frags + 1))) { if (!netif_queue_stopped(dev)) { netif_stop_queue(dev); @@ -3775,7 +3772,6 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) printk(KERN_ERR PFX "%s: BUG! Tx Ring full when " "queue awake!\n", dev->name); } - spin_unlock(&tp->tx_lock); return NETDEV_TX_BUSY; } @@ -3858,15 +3854,16 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) tw32_tx_mbox((MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW), entry); tp->tx_prod = entry; - if (TX_BUFFS_AVAIL(tp) <= (MAX_SKB_FRAGS + 1)) { + if (unlikely(TX_BUFFS_AVAIL(tp) <= (MAX_SKB_FRAGS + 1))) { + spin_lock(&tp->tx_lock); netif_stop_queue(dev); if (TX_BUFFS_AVAIL(tp) > TG3_TX_WAKEUP_THRESH) netif_wake_queue(tp->dev); + spin_unlock(&tp->tx_lock); } out_unlock: mmiowb(); - spin_unlock(&tp->tx_lock); dev->trans_start = jiffies; @@ -3885,14 +3882,11 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev) len = skb_headlen(skb); - /* No BH disabling for tx_lock here. We are running in BH disabled - * context and TX reclaim runs via tp->poll inside of a software + /* We are running in BH disabled context with netif_tx_lock + * and TX reclaim runs via tp->poll inside of a software * interrupt. Furthermore, IRQ processing runs lockless so we have * no IRQ context deadlocks to worry about either. Rejoice! */ - if (!spin_trylock(&tp->tx_lock)) - return NETDEV_TX_LOCKED; - if (unlikely(TX_BUFFS_AVAIL(tp) <= (skb_shinfo(skb)->nr_frags + 1))) { if (!netif_queue_stopped(dev)) { netif_stop_queue(dev); @@ -3901,7 +3895,6 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev) printk(KERN_ERR PFX "%s: BUG! Tx Ring full when " "queue awake!\n", dev->name); } - spin_unlock(&tp->tx_lock); return NETDEV_TX_BUSY; } @@ -4039,15 +4032,16 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev) tw32_tx_mbox((MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW), entry); tp->tx_prod = entry; - if (TX_BUFFS_AVAIL(tp) <= (MAX_SKB_FRAGS + 1)) { + if (unlikely(TX_BUFFS_AVAIL(tp) <= (MAX_SKB_FRAGS + 1))) { + spin_lock(&tp->tx_lock); netif_stop_queue(dev); if (TX_BUFFS_AVAIL(tp) > TG3_TX_WAKEUP_THRESH) netif_wake_queue(tp->dev); + spin_unlock(&tp->tx_lock); } out_unlock: mmiowb(); - spin_unlock(&tp->tx_lock); dev->trans_start = jiffies; @@ -11284,7 +11278,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, SET_MODULE_OWNER(dev); SET_NETDEV_DEV(dev, &pdev->dev); - dev->features |= NETIF_F_LLTX; #if TG3_VLAN_TAG_USED dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; dev->vlan_rx_register = tg3_vlan_rx_register; |