tunnel: Inherit NETIF_F_SG for hw_enc_features.

Inherit scatergather feature for tunnel devices to avoid
copy for TSO packets of tunneling device like GRE.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/dev.c b/net/core/dev.c
index bb999931729faf859bc5a9824048efdd92f1325f..90cee5be1c0fe14914d07ce6eee218ccc10a58b0 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5205,6 +5205,10 @@ int register_netdevice(struct net_device *dev)
         */
        dev->vlan_features |= NETIF_F_HIGHDMA;
 
+       /* Make NETIF_F_SG inheritable to tunnel devices.
+        */
+       dev->hw_enc_features |= NETIF_F_SG;
+
        ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev);
        ret = notifier_to_errno(ret);
        if (ret)