Commit a881ae1f authored Jun 16, 2013 by Gao feng Committed by David S. Miller Jun 19, 2013

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: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 9fa8e980

net/ipv6/addrconf.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2655,6 +2655,9 @@ static void init_loopback(struct net_device *dev)
		if (sp_ifa->flags & (IFA_F_DADFAILED \| IFA_F_TENTATIVE))
		continue;

		if (sp_ifa->rt)
		continue;

		sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);

		/* Failure cases are ignored */