1 files changed, 20 insertions, 3 deletions

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 48b25c0af4d0..8edfea5da572 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -106,7 +106,6 @@ static int lowpan_header_create(struct sk_buff *skb,
                            unsigned short type, const void *_daddr,
                            const void *_saddr, unsigned int len)
 {
-        struct ipv6hdr *hdr;
         const u8 *saddr = _saddr;
         const u8 *daddr = _daddr;
         struct ieee802154_addr sa, da;
@@ -117,8 +116,6 @@ static int lowpan_header_create(struct sk_buff *skb,
         if (type != ETH_P_IPV6)
                 return 0;
 
-        hdr = ipv6_hdr(skb);
-
         if (!saddr)
                 saddr = dev->dev_addr;
 
@@ -533,7 +530,27 @@ static struct header_ops lowpan_header_ops = {
         .create = lowpan_header_create,
 };
 
+static struct lock_class_key lowpan_tx_busylock;
+static struct lock_class_key lowpan_netdev_xmit_lock_key;
+
+static void lowpan_set_lockdep_class_one(struct net_device *dev,
+                                         struct netdev_queue *txq,
+                                         void *_unused)
+{
+        lockdep_set_class(&txq->_xmit_lock,
+                          &lowpan_netdev_xmit_lock_key);
+}
+
+
+static int lowpan_dev_init(struct net_device *dev)
+{
+        netdev_for_each_tx_queue(dev, lowpan_set_lockdep_class_one, NULL);
+        dev->qdisc_tx_busylock = &lowpan_tx_busylock;
+        return 0;
+}
+
 static const struct net_device_ops lowpan_netdev_ops = {
+        .ndo_init               = lowpan_dev_init,
         .ndo_start_xmit         = lowpan_xmit,
         .ndo_set_mac_address    = lowpan_set_address,
 };