[IPV6]: Set IF_READY if the device is up and has carrier

We still need to set the IF_READY flag in ipv6_add_dev for the case
where all addresses (including the link-local) are deleted and then
recreated.  In that case the IPv6 device too will be destroyed and
then recreated.

In order to prevent the original problem, we simply ensure that
the device is up before setting IF_READY.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1b616992d91637de002f87ab94843ce90301ba33..7552663aa125343fb70fe96a4cd981430fb41854 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -342,6 +342,9 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
        }
 #endif
 
+       if (netif_running(dev) && netif_carrier_ok(dev))
+               ndev->if_flags |= IF_READY;
+
        ipv6_mc_init_dev(ndev);
        ndev->tstamp = jiffies;
 #ifdef CONFIG_SYSCTL