1 files changed, 15 insertions, 6 deletions

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index ecc796878f38..1d50f801f181 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -66,6 +66,14 @@ static DEFINE_SPINLOCK(nr_list_lock);
 static const struct proto_ops nr_proto_ops;
 
 /*
+ * NETROM network devices are virtual network devices encapsulating NETROM
+ * frames into AX.25 which will be sent through an AX.25 device, so form a
+ * special "super class" of normal net devices; split their locks off into a
+ * separate class since they always nest.
+ */
+static struct lock_class_key nr_netdev_xmit_lock_key;
+
+/*
  *      Socket removal during an interrupt is now safe.
  */
 static void nr_remove_socket(struct sock *sk)
@@ -986,18 +994,18 @@ int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
         nr_make->vl        = 0;
         nr_make->state     = NR_STATE_3;
         sk_acceptq_added(sk);
-
-        nr_insert_socket(make);
-
         skb_queue_head(&sk->sk_receive_queue, skb);
 
-        nr_start_heartbeat(make);
-        nr_start_idletimer(make);
-
         if (!sock_flag(sk, SOCK_DEAD))
                 sk->sk_data_ready(sk, skb->len);
 
         bh_unlock_sock(sk);
+
+        nr_insert_socket(make);
+
+        nr_start_heartbeat(make);
+        nr_start_idletimer(make);
+
         return 1;
 }
 
@@ -1405,6 +1413,7 @@ static int __init nr_proto_init(void)
                         free_netdev(dev);
                         goto fail;
                 }
+                lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key);
                 dev_nr[i] = dev;
         }