net: unset IFF_XMIT_DST_RELEASE for qeth and ipoib

Last two drivers that need skb->dst in their start_xmit() function

Tell dev_hard_start_xmit() to no release it by unsetting  IFF_XMIT_DST_RELEASE

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/infiniband/ulp/ipoib/ipoib_main.c

@@ -1053,6 +1053,7 @@ static void ipoib_setup(struct net_device *dev)
 	dev->tx_queue_len	 = ipoib_sendq_size * 2;
 	dev->features		 = (NETIF_F_VLAN_CHALLENGED	|
 				    NETIF_F_HIGHDMA);
+	dev->priv_flags		&= ~IFF_XMIT_DST_RELEASE;
 
 	memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
 

drivers/s390/net/qeth_l3_main.c

@@ -3012,6 +3012,7 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 	card->dev->features |=	NETIF_F_HW_VLAN_TX |
 				NETIF_F_HW_VLAN_RX |
 				NETIF_F_HW_VLAN_FILTER;
+	card->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
 
 	SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 	return register_netdev(card->dev);