[NETNS]: Don't panic on creating the namespace's loopback

When the loopback device is failed to initialize inside the new
namespaces, panic() is called. Do not do it when the namespace
in question is not the init_net.

Plus cleanup the error path a bit.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index be25aa33971cd5f51a2fbff62dcd807420f623fd..662b8d16803ce7fec85f59af645b60aabee75c41 100644 (file)
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -265,17 +265,16 @@ static __net_init int loopback_net_init(struct net *net)
        if (err)
                goto out_free_netdev;
 
-       err = 0;
        net->loopback_dev = dev;
+       return 0;
 
-out:
-       if (err)
-               panic("loopback: Failed to register netdevice: %d\n", err);
-       return err;
 
 out_free_netdev:
        free_netdev(dev);
-       goto out;
+out:
+       if (net == &init_net)
+               panic("loopback: Failed to register netdevice: %d\n", err);
+       return err;
 }
 
 static __net_exit void loopback_net_exit(struct net *net)