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ipv6: Only act upon NETDEV_*_TYPE_CHANGE if we have ipv6 addresses 

An interface changing type may not have IPv6 addresses. Don't
call the address configuration type change in this case.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2015-12-03 21:12:32 +01:00 committed by David S. Miller
parent 2f8364a291
commit 3ef0952ca8
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/addrconf.c
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@ -3287,7 +3287,8 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
case NETDEV_PRE_TYPE_CHANGE:
case NETDEV_POST_TYPE_CHANGE:
addrconf_type_change(dev, event);
if (idev)
addrconf_type_change(dev, event);
break;
}