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vlan: Warn the user if lowerdev has bad vlan features.

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Some drivers incorrectly assign vlan acceleration features to
vlan_features thus causing issues for Q-in-Q vlan configurations.
Warn the user of such cases.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich
2014-03-27 22:14:49 -04:00
committed by David S. Miller
parent 3f8c707b9a
commit 2adb956b08
2 changed files with 10 additions and 0 deletions
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3
net/8021q/vlan_dev.c
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@@ -578,6 +578,9 @@ static int vlan_dev_init(struct net_device *dev)
dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
dev->gso_max_size = real_dev->gso_max_size;
if (dev->features & NETIF_F_VLAN_FEATURES)
netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
/* ipv6 shared card related stuff */
dev->dev_id = real_dev->dev_id;