infiniband: cxgb4: Convert import_ep() over to dst_neigh_lookup().

Now we must provide the IP destination address, and a reference has
to be dropped when we're done with the entry.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 0668bb3..0cf6155 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -1562,11 +1562,11 @@
 	struct neighbour *n;
 	int err, step;
 
-	rcu_read_lock();
-	n = dst_get_neighbour_noref(dst);
-	err = -ENODEV;
+	n = dst_neigh_lookup(dst, &peer_ip);
 	if (!n)
-		goto out;
+		return -ENODEV;
+
+	rcu_read_lock();
 	err = -ENOMEM;
 	if (n->dev->flags & IFF_LOOPBACK) {
 		struct net_device *pdev;
@@ -1614,6 +1614,8 @@
 out:
 	rcu_read_unlock();
 
+	neigh_release(n);
+
 	return err;
 }