blackhole_netdev: use blackhole_netdev to invalidate dst entries

Use blackhole_netdev instead of 'lo' device with lower MTU when marking
dst "dead".

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Tested-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index bbd55c7f6b2e..dc1f510a7c81 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1532,7 +1532,6 @@ static void ipv4_dst_destroy(struct dst_entry *dst)
 
 void rt_flush_dev(struct net_device *dev)
 {
-        struct net *net = dev_net(dev);
         struct rtable *rt;
         int cpu;
 
@@ -1543,7 +1542,7 @@ void rt_flush_dev(struct net_device *dev)
                 list_for_each_entry(rt, &ul->head, rt_uncached) {
                         if (rt->dst.dev != dev)
                                 continue;
-                        rt->dst.dev = net->loopback_dev;
+                        rt->dst.dev = blackhole_netdev;
                         dev_hold(rt->dst.dev);
                         dev_put(dev);
                 }