ipv6: avoid unregistering inet6_dev for loopback

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / addrconf.c

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 9c4aa2e22448c5aa86ea00327e594b8c6cb3a83a..5ea5f77c0ec1b1b53059ec19a1f582190c353bc1 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2892,6 +2892,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 {
        struct net_device *dev = (struct net_device *) data;
        struct inet6_dev *idev = __in6_dev_get(dev);
+       struct net *net = dev_net(dev);
        int run_pending = 0;
        int err;
 
@@ -2988,7 +2989,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
                         * IPV6_MIN_MTU stop IPv6 on this interface.
                         */
                        if (dev->mtu < IPV6_MIN_MTU)
-                               addrconf_ifdown(dev, 1);
+                               addrconf_ifdown(dev, dev != net->loopback_dev);
                }
                break;