Exclude duplicated checking for iface-up. This flags is checked in...

Exclude duplicated checking for iface-up. This flags is checked in 'is_skb_forwardable' function, which is subroutine of 'dev_forward_skb'.
Signed-off-by: NAlexander Smirnov <alex.bluesman.smirnov@gmail.com>
Reviewed-by: NWANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/veth.c

@@ -126,9 +126,6 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
 	stats = this_cpu_ptr(priv->stats);
 	rcv_stats = this_cpu_ptr(rcv_priv->stats);
 
-	if (!(rcv->flags & IFF_UP))
-		goto tx_drop;
-
 	/* don't change ip_summed == CHECKSUM_PARTIAL, as that
 	   will cause bad checksum on forwarded packets */
 	if (skb->ip_summed == CHECKSUM_NONE &&