tree 5da346ea833fe8097359613463cd716613359215
parent acc5efbcd2a023c8801f2bba39971cf93812ce7c
author Patrick McHardy <kaber@trash.net> 1200903950 -0800
committer David S. Miller <davem@davemloft.net> 1201561711 -0800

[VLAN]: Simplify vlan unregistration

Keep track of the number of VLAN devices in a vlan group. This allows
to have the caller sense when the group is going to be destroyed and
stop using it, which in turn allows to remove the wrapper around
unregister_vlan_dev for the NETDEV_UNREGISTER notifier and avoid
iterating over all possible VLAN ids whenever a device in unregistered.

Also fix what looks like a use-after-free (but is actually safe since
we're holding the RTNL), the real_dev reference should not be dropped
while we still use it.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>