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Commit a881ae1f authored by Gao feng's avatar Gao feng Committed by David S. Miller
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ipv6: don't call addrconf_dst_alloc again when enable lo



If we disable all of the net interfaces, and enable
un-lo interface before lo interface, we already allocated
the addrconf dst in ipv6_add_addr. So we shouldn't allocate
it again when we enable lo interface.

Otherwise the message below will be triggered.
unregister_netdevice: waiting for sit1 to become free. Usage count = 1

This problem is introduced by commit 25fb6ca4
"net IPv6 : Fix broken IPv6 routing table after loopback down-up"

Signed-off-by: default avatarGao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9fa8e980
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