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@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 958df383068a..ef8a5c20236a 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;