On Wed, Feb 25, 2009 at 06:23:33AM +0100, Patrick McHardy wrote:

An easy fix would be to keep track of whether sysctl unregistration
is in progress in IPv4/IPv6 and ignore new requests from that point
on. Its not very elegant though, so I was wondering whether anyone
has a better suggestion.

We could make the unregistration asynchronous and invoke a callback
when it's done.  Then we can simply hold a net_device refcount and
relinquish it in the callback.

Cheers,
-- 
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