Staging: batman-adv: Count Ethernet header for incoming packets

The Ethernet header is counted when transmitting a packet, so it should also
be counted when receiving a packet. With this patch, the rx_bytes and tx_bytes
statistics behave like an ordinary Ethernet interface.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/batman-adv/soft-interface.c

@@ -259,7 +259,7 @@ void interface_rx(struct sk_buff *skb, int hdr_size)
 	 * PACKET_OTHERHOST or PACKET_HOST */
 
 	priv->stats.rx_packets++;
-	priv->stats.rx_bytes += skb->len;
+	priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
 
 	dev->last_rx = jiffies;