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| author |   Jarek Poplawski <jarkao2@gmail.com> | 2008-01-10 22:38:31 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2008-01-10 22:38:31 -0800 |
| commit | 0fe1e567d0b4f6a98e94d3b9a40f41c801bd157f (patch) | |
| tree | 347b3c1dde2bf56d6b1c24d33e0a1dc05977bc55 /net/8021q/vlan.c | |
| parent | [DECNET] ROUTE: fix rcu_dereference() uses in /proc/net/decnet_cache (diff) | |
| download | linux-dev-0fe1e567d0b4f6a98e94d3b9a40f41c801bd157f.tar.xz linux-dev-0fe1e567d0b4f6a98e94d3b9a40f41c801bd157f.zip | |
[VLAN]: nested VLAN: fix lockdep's recursive locking warning
Allow vlans nesting other vlans without lockdep's warnings (max. 2 levels
i.e. parent + child). Thanks to Patrick McHardy for pointing a bug in the
first version of this patch.
Reported-by: Benny Amorsen
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/8021q/vlan.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index 4add9bd4bc8d..032bf44eca5e 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -323,6 +323,7 @@ static const struct header_ops vlan_header_ops = { static int vlan_dev_init(struct net_device *dev) { struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; + int subclass = 0; /* IFF_BROADCAST|IFF_MULTICAST; ??? */ dev->flags = real_dev->flags & ~IFF_UP; @@ -349,7 +350,11 @@ static int vlan_dev_init(struct net_device *dev) dev->hard_start_xmit = vlan_dev_hard_start_xmit; } - lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key); + if (real_dev->priv_flags & IFF_802_1Q_VLAN) + subclass = 1; + + lockdep_set_class_and_subclass(&dev->_xmit_lock, + &vlan_netdev_xmit_lock_key, subclass); return 0; } |