netdev - [PATCH net] macvlan: Initialize vlan_features to turn on offload support.

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Date:	Thu, 31 Jul 2014 10:30:25 -0400
From:	Vlad Yasevich <vyasevic@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Vlad Yasevich <vyasevic@...hat.com>
Subject: [PATCH net] macvlan: Initialize vlan_features to turn on offload support.

Macvlan devices do not initialize vlan_features.  As a result,
any vlan devices configured on top of macvlans perform very poorly.
Initialize vlan_features based on the vlan features of the lower-level
device.

Signed-off-by: Vlad Yasevich <vyasevic@...hat.com>
---
 drivers/net/macvlan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 958df38..ef8a5c2 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -646,6 +646,7 @@ static int macvlan_init(struct net_device *dev)
 				  (lowerdev->state & MACVLAN_STATE_MASK);
 	dev->features 		= lowerdev->features & MACVLAN_FEATURES;
 	dev->features		|= ALWAYS_ON_FEATURES;
+	dev->vlan_features	= lowerdev->vlan_features & MACVLAN_FEATURES;
 	dev->gso_max_size	= lowerdev->gso_max_size;
 	dev->iflink		= lowerdev->ifindex;
 	dev->hard_header_len	= lowerdev->hard_header_len;
-- 
1.9.3

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