netdev - [PATCH net-next 2/2] tunnel: Inherit NETIF_F_SG for hw_enc

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Date:	Thu,  7 Mar 2013 11:28:08 -0800
From:	Pravin B Shelar <pshelar@...ira.com>
To:	netdev@...r.kernel.org
Cc:	edumazet@...gle.com, jesse@...ira.com,
	Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next 2/2] 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@...ira.com>
---
 net/core/dev.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index bb99993..90cee5b 100644
--- 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)
-- 
1.7.1

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