netdev - [PATCH] net: enable GRO by default for vlan devices

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Message-ID: <20100915192424.GE4191@mmm.home.ifup.org>
Date:	Wed, 15 Sep 2010 12:24:24 -0700
From:	Brandon Philips <bphilips@...e.de>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	David Miller <davem@...emloft.net>, eric.dumazet@...il.com,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	bruce.w.allan@...el.com, alexander.h.duyck@...el.com,
	peter.p.waskiewicz.jr@...el.com, john.ronciak@...el.com,
	donald.c.skidmore@...el.com, netdev@...r.kernel.org,
	e1000-devel@...ts.sourceforge.net
Subject: [PATCH] net: enable GRO by default for vlan devices

Currently vlan devices don't have GRO by default as none of the Ethernet
drivers add NETIF_F_GRO to their vlan_features.

As GRO is a software feature add GRO to dev->vlan_features in
register_netdevice() and let vlan_dev_init() take care that it gets
enabled only when dev->features has NETIF_F_GRO too.

Signed-off-by: Brandon Philips <bphilips@...e.de>

---
 net/core/dev.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index fc2dc93..e7a6bff 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5057,6 +5057,11 @@ int register_netdevice(struct net_device *dev)
 	if (dev->features & NETIF_F_SG)
 		dev->features |= NETIF_F_GSO;
 
+	/* Enable GRO for vlans by default if dev->features has GRO also. 
+	 * vlan_dev_init() will do the dev->features check.
+	 */
+	dev->vlan_features |= NETIF_F_GRO;
+
 	ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev);
 	ret = notifier_to_errno(ret);
 	if (ret)
-- 
1.7.1

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