[TG3]: Convert to non-LLTX

[deliverable/linux.git] / drivers / net / tg3.c

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 542d4c3a10e5e6d1da5a4b0744d121ba9c15cbbc..b2ddd4522a87b0e070952d3ab55432ccba452011 100644 (file)
--- 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;