Merge branch 'tipc-failover-fixes'

Merge branch 'tipc-failover-fixes'

Jon Maloy says:

====================
tipc: fix link failover/synch problems

We fix three problems with the new link failover/synch implementation,
which was introduced earlier in this release cycle. They are all related
to situations where there is a very short interval between the disabling
and enabling of interfaces.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>