Merge 8139too net driver oops fix from 2.4.x.

Fix originally by Andreas Dilger IIRC, merged by Dave Jones.

drivers/net/8139too.c

@@ -1646,11 +1646,12 @@ static int rtl8139_start_xmit (struct sk_buff *skb, struct net_device *dev)
 	struct rtl8139_private *tp = dev->priv;
 	void *ioaddr = tp->mmio_addr;
 	unsigned int entry;
+	unsigned int len = skb->len;
 
 	/* Calculate the next Tx descriptor entry. */
 	entry = tp->cur_tx % NUM_TX_DESC;
 
-	if (likely(skb->len < TX_BUF_SIZE)) {
+	if (likely(len < TX_BUF_SIZE)) {
 		skb_copy_and_csum_dev(skb, tp->tx_buf[entry]);
 		dev_kfree_skb(skb);
 	} else {
@@ -1662,7 +1663,7 @@ static int rtl8139_start_xmit (struct sk_buff *skb, struct net_device *dev)
 	/* Note: the chip doesn't have auto-pad! */
 	spin_lock_irq(&tp->lock);
 	RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
-		   tp->tx_flag | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN));
+		   tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
 
 	dev->trans_start = jiffies;
 
@@ -1673,8 +1674,8 @@ static int rtl8139_start_xmit (struct sk_buff *skb, struct net_device *dev)
 		netif_stop_queue (dev);
 	spin_unlock_irq(&tp->lock);
 
-	DPRINTK ("%s: Queued Tx packet at %p size %u to slot %d.\n",
-		 dev->name, skb->data, skb->len, entry);
+	DPRINTK ("%s: Queued Tx packet size %u to slot %d.\n",
+		 dev->name, len, entry);
 
 	return 0;
 }