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vlan: allow to change type when no vlan device is hooked on netdev 

vlan_info might be present but still no vlan devices might be there.
That is in case of vlan0 automatically added.

So in that case, allow to change netdev type.

Reported-by: Jon Stanley <jstanley@rmrf.net>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Jiri Pirko 2012-10-17 01:37:36 +00:00 committed by David S. Miller
parent 0ca7111a38
commit 18c22a03a2
1 changed files with 3 additions and 1 deletions
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4
net/8021q/vlan.c
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@ -463,7 +463,9 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
if (vlan_uses_dev(dev))
return NOTIFY_BAD;
break;
case NETDEV_NOTIFY_PEERS:
case NETDEV_BONDING_FAILOVER: