[PATCH] vlan: allow TSO setting on vlan interfaces

[Eric Dumazet <eric.dumazet@gmail.com>]

When we need to shape traffic with low speeds, we need to disable tso on
network interface :

ethtool -K eth0.2240 tso off

It seems vlan interfaces miss the set_tso() ethtool method.
Propagating tso changes from lower device is not always wanted, some
vlan want TSO on, other want TSO off.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
---

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index c6456cb..d827c2e 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -844,6 +844,7 @@ static const struct ethtool_ops vlan_ethtool_ops = {
 	.get_link		= ethtool_op_get_link,
 	.get_rx_csum		= vlan_ethtool_get_rx_csum,
 	.get_flags		= vlan_ethtool_get_flags,
+	.set_tso		= ethtool_op_set_tso,
 };
 
 static const struct net_device_ops vlan_netdev_ops = {