netiucv: displayed TX bytes value much too high

tx_bytes value must be updated by skb length before skb is freed.
Signed-off-by: NUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/s390/net/netiucv.c

@@ -741,13 +741,13 @@ static void conn_action_txdone(fsm_instance *fi, int event, void *arg)
 	if (single_flag) {
 		if ((skb = skb_dequeue(&conn->commit_queue))) {
 			atomic_dec(&skb->users);
-			dev_kfree_skb_any(skb);
 			if (privptr) {
 				privptr->stats.tx_packets++;
 				privptr->stats.tx_bytes +=
 					(skb->len - NETIUCV_HDRLEN
-					 	  - NETIUCV_HDRLEN);
+						  - NETIUCV_HDRLEN);
 			}
+			dev_kfree_skb_any(skb);
 		}
 	}
 	conn->tx_buff->data = conn->tx_buff->head;