3C509: rx_bytes should not be increased when alloc_skb failed

If alloc_skb failed, the recieved packet will be dropped. Do not increase
rx_bytes for dropped packet.
Signed-off-by: NWang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/net/3c509.c

@@ -1063,7 +1063,6 @@ el3_rx(struct net_device *dev)
 			struct sk_buff *skb;
 
 			skb = dev_alloc_skb(pkt_len+5);
-			dev->stats.rx_bytes += pkt_len;
 			if (el3_debug > 4)
 				printk("Receiving packet size %d status %4.4x.\n",
 					   pkt_len, rx_status);
@@ -1078,6 +1077,7 @@ el3_rx(struct net_device *dev)
 				skb->protocol = eth_type_trans(skb,dev);
 				netif_rx(skb);
 				dev->last_rx = jiffies;
+				dev->stats.rx_bytes += pkt_len;
 				dev->stats.rx_packets++;
 				continue;
 			}