[PATCH 2.6 5/14] e1000: Avoid filling tx_ring completely - shemminger@osdl.org

[Ganesh Venkatesan <ganesh.venkatesan@xxxxxxxxx>]

Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@xxxxxxxxx>
diff -up net-drivers-2.6/drivers/net/e1000/e1000_main.c 
net-drivers-2.6/drivers/net/e1000.new/e1000_main.c
--- net-drivers-2.6/drivers/net/e1000/e1000_main.c      2004-12-03 
07:24:37.090623184 -0800
+++ net-drivers-2.6/drivers/net/e1000.new/e1000_main.c  2004-12-03 
07:24:38.581396552 -0800
@@ -1842,6 +1842,10 @@ e1000_xmit_frame(struct sk_buff *skb, st
 
        netdev->trans_start = jiffies;
 
+       /* Make sure there is space in the ring for the next send. */
+       if(unlikely(E1000_DESC_UNUSED(&adapter->tx_ring) < MAX_SKB_FRAGS + 2))
+               netif_stop_queue(netdev);
+
        spin_unlock_irqrestore(&adapter->tx_lock, flags);
        return NETDEV_TX_OK;
 }