[PATCH 3.16 05/17] macvlan: Initialize vlan_features to turn on offload support.

From: Greg Kroah-Hartman
Date: Fri Aug 08 2014 - 17:47:00 EST


3.16-stable review patch. If anyone has any objections, please let me know.

------------------

From: Vlad Yasevich <vyasevic@xxxxxxxxxx>

[ Upstream commit 081e83a78db9b0ae1f5eabc2dedecc865f509b98 ]

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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/macvlan.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -646,6 +646,7 @@ static int macvlan_init(struct net_devic
(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;


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