diff options
| author | Paul Mackerras <paulus@samba.org> | 2008-01-24 10:07:21 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-24 10:07:21 +1100 |
| commit | 9156ad48338e0306e508ead5c0d9986050744475 (patch) | |
| tree | 37f3a90e38190052ecf3cdf9171dfdddd37b56fd /drivers/net/macvlan.c | |
| parent | fa28237cfcc5827553044cbd6ee52e33692b0faa (diff) | |
| parent | 8f7b3d156d348b6766833cd4e272d0d19b501e64 (diff) | |
Merge branch 'linux-2.6'
Diffstat (limited to 'drivers/net/macvlan.c')
| -rw-r--r-- | drivers/net/macvlan.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 2e4bcd5654c..e8dc2f44fec 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -384,6 +384,13 @@ static int macvlan_newlink(struct net_device *dev, if (lowerdev == NULL) return -ENODEV; + /* Don't allow macvlans on top of other macvlans - its not really + * wrong, but lockdep can't handle it and its not useful for anything + * you couldn't do directly on top of the real device. + */ + if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) + return -ENODEV; + if (!tb[IFLA_MTU]) dev->mtu = lowerdev->mtu; else if (dev->mtu > lowerdev->mtu) |