[ARP]: Remove overkill checks from neigh_param_alloc.

Valid network device is always passed into neigh_param_alloc, so
remove extra checking for dev == NULL. Additionally, cleanup bogus
netns assignment.

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

1 files changed, 7 insertions, 11 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 19c0dd12fd58..62d47841c67d 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1291,10 +1291,7 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
         struct neigh_parms *p, *ref;
         struct net *net;
 
-        net = &init_net;
-        if (dev)
-                net = dev->nd_net;
-
+        net = dev->nd_net;
         ref = lookup_neigh_params(tbl, net, 0);
         if (!ref)
                 return NULL;
@@ -1306,15 +1303,14 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
                 INIT_RCU_HEAD(&p->rcu_head);
                 p->reachable_time =
                                 neigh_rand_reach_time(p->base_reachable_time);
-                if (dev) {
-                        if (dev->neigh_setup && dev->neigh_setup(dev, p)) {
-                                kfree(p);
-                                return NULL;
-                        }
 
-                        dev_hold(dev);
-                        p->dev = dev;
+                if (dev->neigh_setup && dev->neigh_setup(dev, p)) {
+                        kfree(p);
+                        return NULL;
                 }
+
+                dev_hold(dev);
+                p->dev = dev;
                 p->net = hold_net(net);
                 p->sysctl_table = NULL;
                 write_lock_bh(&tbl->lock);