Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) BPF debugger and asm tool by Daniel Borkmann.

 2) Speed up create/bind in AF_PACKET, also from Daniel Borkmann.

 3) Correct reciprocal_divide and update users, from Hannes Frederic
    Sowa and Daniel Borkmann.

 4) Currently we only have a "set" operation for the hw timestamp socket
    ioctl, add a "get" operation to match.  From Ben Hutchings.

 5) Add better trace events for debugging driver datapath problems, also
    from Ben Hutchings.

 6) Implement auto corking in TCP, from Eric Dumazet.  Basically, if we
    have a small send and a previous packet is already in the qdisc or
    device queue, defer until TX completion or we get more data.

 7) Allow userspace to manage ipv6 temporary addresses, from Jiri Pirko.

 8) Add a qdisc bypass option for AF_PACKET sockets, from Daniel
    Borkmann.

 9) Share IP header compression code between Bluetooth and IEEE802154
    layers, from Jukka Rissanen.

10) Fix ipv6 router reachability probing, from Jiri Benc.

11) Allow packets to be captured on macvtap devices, from Vlad Yasevich.

12) Support tunneling in GRO layer, from Jerry Chu.

13) Allow bonding to be configured fully using netlink, from Scott
    Feldman.

14) Allow AF_PACKET users to obtain the VLAN TPID, just like they can
    already get the TCI.  From Atzm Watanabe.

15) New "Heavy Hitter" qdisc, from Terry Lam.

16) Significantly improve the IPSEC support in pktgen, from Fan Du.

17) Allow ipv4 tunnels to cache routes, just like sockets.  From Tom
    Herbert.

18) Add Proportional Integral Enhanced packet scheduler, from Vijay
    Subramanian.

19) Allow openvswitch to mmap'd netlink, from Thomas Graf.

20) Key TCP metrics blobs also by source address, not just destination
    address.  From Christoph Paasch.

21) Support 10G in generic phylib.  From Andy Fleming.

22) Try to short-circuit GRO flow compares using device provided RX
    hash, if provided.  From Tom Herbert.

The wireless and netfilter folks have been busy little bees too.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2064 commits)
  net/cxgb4: Fix referencing freed adapter
  ipv6: reallocate addrconf router for ipv6 address when lo device up
  fib_frontend: fix possible NULL pointer dereference
  rtnetlink: remove IFLA_BOND_SLAVE definition
  rtnetlink: remove check for fill_slave_info in rtnl_have_link_slave_info
  qlcnic: update version to 5.3.55
  qlcnic: Enhance logic to calculate msix vectors.
  qlcnic: Refactor interrupt coalescing code for all adapters.
  qlcnic: Update poll controller code path
  qlcnic: Interrupt code cleanup
  qlcnic: Enhance Tx timeout debugging.
  qlcnic: Use bool for rx_mac_learn.
  bonding: fix u64 division
  rtnetlink: add missing IFLA_BOND_AD_INFO_UNSPEC
  sfc: Use the correct maximum TX DMA ring size for SFC9100
  Add Shradha Shah as the sfc driver maintainer.
  net/vxlan: Share RX skb de-marking and checksum checks with ovs
  tulip: cleanup by using ARRAY_SIZE()
  ip_tunnel: clear IPCB in ip_tunnel_xmit() in case dst_link_failure() is called
  net/cxgb4: Don't retrieve stats during recovery
  ...

14 files changed, 1972 insertions, 194 deletions

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
new file mode 100644
index 000000000000..adb3ea04adaa
--- /dev/null
+++ b/net/bluetooth/6lowpan.c
@@ -0,0 +1,860 @@
+/*
+   Copyright (c) 2013 Intel Corp.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 and
+   only version 2 as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+
+#include <net/af_ieee802154.h> /* to get the address type */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "6lowpan.h"
+
+#include "../ieee802154/6lowpan.h" /* for the compression support */
+
+#define IFACE_NAME_TEMPLATE "bt%d"
+#define EUI64_ADDR_LEN 8
+
+struct skb_cb {
+	struct in6_addr addr;
+	struct l2cap_conn *conn;
+};
+#define lowpan_cb(skb) ((struct skb_cb *)((skb)->cb))
+
+/* The devices list contains those devices that we are acting
+ * as a proxy. The BT 6LoWPAN device is a virtual device that
+ * connects to the Bluetooth LE device. The real connection to
+ * BT device is done via l2cap layer. There exists one
+ * virtual device / one BT 6LoWPAN network (=hciX device).
+ * The list contains struct lowpan_dev elements.
+ */
+static LIST_HEAD(bt_6lowpan_devices);
+static DEFINE_RWLOCK(devices_lock);
+
+struct lowpan_peer {
+	struct list_head list;
+	struct l2cap_conn *conn;
+
+	/* peer addresses in various formats */
+	unsigned char eui64_addr[EUI64_ADDR_LEN];
+	struct in6_addr peer_addr;
+};
+
+struct lowpan_dev {
+	struct list_head list;
+
+	struct hci_dev *hdev;
+	struct net_device *netdev;
+	struct list_head peers;
+	atomic_t peer_count; /* number of items in peers list */
+
+	struct work_struct delete_netdev;
+	struct delayed_work notify_peers;
+};
+
+static inline struct lowpan_dev *lowpan_dev(const struct net_device *netdev)
+{
+	return netdev_priv(netdev);
+}
+
+static inline void peer_add(struct lowpan_dev *dev, struct lowpan_peer *peer)
+{
+	list_add(&peer->list, &dev->peers);
+	atomic_inc(&dev->peer_count);
+}
+
+static inline bool peer_del(struct lowpan_dev *dev, struct lowpan_peer *peer)
+{
+	list_del(&peer->list);
+
+	if (atomic_dec_and_test(&dev->peer_count)) {
+		BT_DBG("last peer");
+		return true;
+	}
+
+	return false;
+}
+
+static inline struct lowpan_peer *peer_lookup_ba(struct lowpan_dev *dev,
+						 bdaddr_t *ba, __u8 type)
+{
+	struct lowpan_peer *peer, *tmp;
+
+	BT_DBG("peers %d addr %pMR type %d", atomic_read(&dev->peer_count),
+	       ba, type);
+
+	list_for_each_entry_safe(peer, tmp, &dev->peers, list) {
+		BT_DBG("addr %pMR type %d",
+		       &peer->conn->hcon->dst, peer->conn->hcon->dst_type);
+
+		if (bacmp(&peer->conn->hcon->dst, ba))
+			continue;
+
+		if (type == peer->conn->hcon->dst_type)
+			return peer;
+	}
+
+	return NULL;
+}
+
+static inline struct lowpan_peer *peer_lookup_conn(struct lowpan_dev *dev,
+						   struct l2cap_conn *conn)
+{
+	struct lowpan_peer *peer, *tmp;
+
+	list_for_each_entry_safe(peer, tmp, &dev->peers, list) {
+		if (peer->conn == conn)
+			return peer;
+	}
+
+	return NULL;
+}
+
+static struct lowpan_peer *lookup_peer(struct l2cap_conn *conn)
+{
+	struct lowpan_dev *entry, *tmp;
+	struct lowpan_peer *peer = NULL;
+	unsigned long flags;
+
+	read_lock_irqsave(&devices_lock, flags);
+
+	list_for_each_entry_safe(entry, tmp, &bt_6lowpan_devices, list) {
+		peer = peer_lookup_conn(entry, conn);
+		if (peer)
+			break;
+	}
+
+	read_unlock_irqrestore(&devices_lock, flags);
+
+	return peer;
+}
+
+static struct lowpan_dev *lookup_dev(struct l2cap_conn *conn)
+{
+	struct lowpan_dev *entry, *tmp;
+	struct lowpan_dev *dev = NULL;
+	unsigned long flags;
+
+	read_lock_irqsave(&devices_lock, flags);
+
+	list_for_each_entry_safe(entry, tmp, &bt_6lowpan_devices, list) {
+		if (conn->hcon->hdev == entry->hdev) {
+			dev = entry;
+			break;
+		}
+	}
+
+	read_unlock_irqrestore(&devices_lock, flags);
+
+	return dev;
+}
+
+static int give_skb_to_upper(struct sk_buff *skb, struct net_device *dev)
+{
+	struct sk_buff *skb_cp;
+	int ret;
+
+	skb_cp = skb_copy(skb, GFP_ATOMIC);
+	if (!skb_cp)
+		return -ENOMEM;
+
+	ret = netif_rx(skb_cp);
+
+	BT_DBG("receive skb %d", ret);
+	if (ret < 0)
+		return NET_RX_DROP;
+
+	return ret;
+}
+
+static int process_data(struct sk_buff *skb, struct net_device *netdev,
+			struct l2cap_conn *conn)
+{
+	const u8 *saddr, *daddr;
+	u8 iphc0, iphc1;
+	struct lowpan_dev *dev;
+	struct lowpan_peer *peer;
+	unsigned long flags;
+
+	dev = lowpan_dev(netdev);
+
+	read_lock_irqsave(&devices_lock, flags);
+	peer = peer_lookup_conn(dev, conn);
+	read_unlock_irqrestore(&devices_lock, flags);
+	if (!peer)
+		goto drop;
+
+	saddr = peer->eui64_addr;
+	daddr = dev->netdev->dev_addr;
+
+	/* at least two bytes will be used for the encoding */
+	if (skb->len < 2)
+		goto drop;
+
+	if (lowpan_fetch_skb_u8(skb, &iphc0))
+		goto drop;
+
+	if (lowpan_fetch_skb_u8(skb, &iphc1))
+		goto drop;
+
+	return lowpan_process_data(skb, netdev,
+				   saddr, IEEE802154_ADDR_LONG, EUI64_ADDR_LEN,
+				   daddr, IEEE802154_ADDR_LONG, EUI64_ADDR_LEN,
+				   iphc0, iphc1, give_skb_to_upper);
+
+drop:
+	kfree_skb(skb);
+	return -EINVAL;
+}
+
+static int recv_pkt(struct sk_buff *skb, struct net_device *dev,
+		    struct l2cap_conn *conn)
+{
+	struct sk_buff *local_skb;
+	int ret;
+
+	if (!netif_running(dev))
+		goto drop;
+
+	if (dev->type != ARPHRD_6LOWPAN)
+		goto drop;
+
+	/* check that it's our buffer */
+	if (skb->data[0] == LOWPAN_DISPATCH_IPV6) {
+		/* Copy the packet so that the IPv6 header is
+		 * properly aligned.
+		 */
+		local_skb = skb_copy_expand(skb, NET_SKB_PAD - 1,
+					    skb_tailroom(skb), GFP_ATOMIC);
+		if (!local_skb)
+			goto drop;
+
+		local_skb->protocol = htons(ETH_P_IPV6);
+		local_skb->pkt_type = PACKET_HOST;
+
+		skb_reset_network_header(local_skb);
+		skb_set_transport_header(local_skb, sizeof(struct ipv6hdr));
+
+		if (give_skb_to_upper(local_skb, dev) != NET_RX_SUCCESS) {
+			kfree_skb(local_skb);
+			goto drop;
+		}
+
+		dev->stats.rx_bytes += skb->len;
+		dev->stats.rx_packets++;
+
+		kfree_skb(local_skb);
+		kfree_skb(skb);
+	} else {
+		switch (skb->data[0] & 0xe0) {
+		case LOWPAN_DISPATCH_IPHC:	/* ipv6 datagram */
+			local_skb = skb_clone(skb, GFP_ATOMIC);
+			if (!local_skb)
+				goto drop;
+
+			ret = process_data(local_skb, dev, conn);
+			if (ret != NET_RX_SUCCESS)
+				goto drop;
+
+			dev->stats.rx_bytes += skb->len;
+			dev->stats.rx_packets++;
+
+			kfree_skb(skb);
+			break;
+		default:
+			break;
+		}
+	}
+
+	return NET_RX_SUCCESS;
+
+drop:
+	kfree_skb(skb);
+	return NET_RX_DROP;
+}
+
+/* Packet from BT LE device */
+int bt_6lowpan_recv(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct lowpan_dev *dev;
+	struct lowpan_peer *peer;
+	int err;
+
+	peer = lookup_peer(conn);
+	if (!peer)
+		return -ENOENT;
+
+	dev = lookup_dev(conn);
+	if (!dev || !dev->netdev)
+		return -ENOENT;
+
+	err = recv_pkt(skb, dev->netdev, conn);
+	BT_DBG("recv pkt %d", err);
+
+	return err;
+}
+
+static inline int skbuff_copy(void *msg, int len, int count, int mtu,
+			      struct sk_buff *skb, struct net_device *dev)
+{
+	struct sk_buff **frag;
+	int sent = 0;
+
+	memcpy(skb_put(skb, count), msg, count);
+
+	sent += count;
+	msg  += count;
+	len  -= count;
+
+	dev->stats.tx_bytes += count;
+	dev->stats.tx_packets++;
+
+	raw_dump_table(__func__, "Sending", skb->data, skb->len);
+
+	/* Continuation fragments (no L2CAP header) */
+	frag = &skb_shinfo(skb)->frag_list;
+	while (len > 0) {
+		struct sk_buff *tmp;
+
+		count = min_t(unsigned int, mtu, len);
+
+		tmp = bt_skb_alloc(count, GFP_ATOMIC);
+		if (!tmp)
+			return -ENOMEM;
+
+		*frag = tmp;
+
+		memcpy(skb_put(*frag, count), msg, count);
+
+		raw_dump_table(__func__, "Sending fragment",
+			       (*frag)->data, count);
+
+		(*frag)->priority = skb->priority;
+
+		sent += count;
+		msg  += count;
+		len  -= count;
+
+		skb->len += (*frag)->len;
+		skb->data_len += (*frag)->len;
+
+		frag = &(*frag)->next;
+
+		dev->stats.tx_bytes += count;
+		dev->stats.tx_packets++;
+	}
+
+	return sent;
+}
+
+static struct sk_buff *create_pdu(struct l2cap_conn *conn, void *msg,
+				  size_t len, u32 priority,
+				  struct net_device *dev)
+{
+	struct sk_buff *skb;
+	int err, count;
+	struct l2cap_hdr *lh;
+
+	/* FIXME: This mtu check should be not needed and atm is only used for
+	 * testing purposes
+	 */
+	if (conn->mtu > (L2CAP_LE_MIN_MTU + L2CAP_HDR_SIZE))
+		conn->mtu = L2CAP_LE_MIN_MTU + L2CAP_HDR_SIZE;
+
+	count = min_t(unsigned int, (conn->mtu - L2CAP_HDR_SIZE), len);
+
+	BT_DBG("conn %p len %zu mtu %d count %d", conn, len, conn->mtu, count);
+
+	skb = bt_skb_alloc(count + L2CAP_HDR_SIZE, GFP_ATOMIC);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	skb->priority = priority;
+
+	lh = (struct l2cap_hdr *)skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(L2CAP_FC_6LOWPAN);
+	lh->len = cpu_to_le16(len);
+
+	err = skbuff_copy(msg, len, count, conn->mtu, skb, dev);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		BT_DBG("skbuff copy %d failed", err);
+		return ERR_PTR(err);
+	}
+
+	return skb;
+}
+
+static int conn_send(struct l2cap_conn *conn,
+		     void *msg, size_t len, u32 priority,
+		     struct net_device *dev)
+{
+	struct sk_buff *skb;
+
+	skb = create_pdu(conn, msg, len, priority, dev);
+	if (IS_ERR(skb))
+		return -EINVAL;
+
+	BT_DBG("conn %p skb %p len %d priority %u", conn, skb, skb->len,
+	       skb->priority);
+
+	hci_send_acl(conn->hchan, skb, ACL_START);
+
+	return 0;
+}
+
+static void get_dest_bdaddr(struct in6_addr *ip6_daddr,
+			    bdaddr_t *addr, u8 *addr_type)
+{
+	u8 *eui64;
+
+	eui64 = ip6_daddr->s6_addr + 8;
+
+	addr->b[0] = eui64[7];
+	addr->b[1] = eui64[6];
+	addr->b[2] = eui64[5];
+	addr->b[3] = eui64[2];
+	addr->b[4] = eui64[1];
+	addr->b[5] = eui64[0];
+
+	addr->b[5] ^= 2;
+
+	/* Set universal/local bit to 0 */
+	if (addr->b[5] & 1) {
+		addr->b[5] &= ~1;
+		*addr_type = ADDR_LE_DEV_PUBLIC;
+	} else {
+		*addr_type = ADDR_LE_DEV_RANDOM;
+	}
+}
+
+static int header_create(struct sk_buff *skb, struct net_device *netdev,
+		         unsigned short type, const void *_daddr,
+		         const void *_saddr, unsigned int len)
+{
+	struct ipv6hdr *hdr;
+	struct lowpan_dev *dev;
+	struct lowpan_peer *peer;
+	bdaddr_t addr, *any = BDADDR_ANY;
+	u8 *saddr, *daddr = any->b;
+	u8 addr_type;
+
+	if (type != ETH_P_IPV6)
+		return -EINVAL;
+
+	hdr = ipv6_hdr(skb);
+
+	dev = lowpan_dev(netdev);
+
+	if (ipv6_addr_is_multicast(&hdr->daddr)) {
+		memcpy(&lowpan_cb(skb)->addr, &hdr->daddr,
+		       sizeof(struct in6_addr));
+		lowpan_cb(skb)->conn = NULL;
+	} else {
+		unsigned long flags;
+
+		/* Get destination BT device from skb.
+		 * If there is no such peer then discard the packet.
+		 */
+		get_dest_bdaddr(&hdr->daddr, &addr, &addr_type);
+
+		BT_DBG("dest addr %pMR type %d", &addr, addr_type);
+
+		read_lock_irqsave(&devices_lock, flags);
+		peer = peer_lookup_ba(dev, &addr, addr_type);
+		read_unlock_irqrestore(&devices_lock, flags);
+
+		if (!peer) {
+			BT_DBG("no such peer %pMR found", &addr);
+			return -ENOENT;
+		}
+
+		daddr = peer->eui64_addr;
+
+		memcpy(&lowpan_cb(skb)->addr, &hdr->daddr,
+		       sizeof(struct in6_addr));
+		lowpan_cb(skb)->conn = peer->conn;
+	}
+
+	saddr = dev->netdev->dev_addr;
+
+	return lowpan_header_compress(skb, netdev, type, daddr, saddr, len);
+}
+
+/* Packet to BT LE device */
+static int send_pkt(struct l2cap_conn *conn, const void *saddr,
+		    const void *daddr, struct sk_buff *skb,
+		    struct net_device *netdev)
+{
+	raw_dump_table(__func__, "raw skb data dump before fragmentation",
+		       skb->data, skb->len);
+
+	return conn_send(conn, skb->data, skb->len, 0, netdev);
+}
+
+static void send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct sk_buff *local_skb;
+	struct lowpan_dev *entry, *tmp;
+	unsigned long flags;
+
+	read_lock_irqsave(&devices_lock, flags);
+
+	list_for_each_entry_safe(entry, tmp, &bt_6lowpan_devices, list) {
+		struct lowpan_peer *pentry, *ptmp;
+		struct lowpan_dev *dev;
+
+		if (entry->netdev != netdev)
+			continue;
+
+		dev = lowpan_dev(entry->netdev);
+
+		list_for_each_entry_safe(pentry, ptmp, &dev->peers, list) {
+			local_skb = skb_clone(skb, GFP_ATOMIC);
+
+			send_pkt(pentry->conn, netdev->dev_addr,
+				 pentry->eui64_addr, local_skb, netdev);
+
+			kfree_skb(local_skb);
+		}
+	}
+
+	read_unlock_irqrestore(&devices_lock, flags);
+}
+
+static netdev_tx_t bt_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	int err = 0;
+	unsigned char *eui64_addr;
+	struct lowpan_dev *dev;
+	struct lowpan_peer *peer;
+	bdaddr_t addr;
+	u8 addr_type;
+
+	if (ipv6_addr_is_multicast(&lowpan_cb(skb)->addr)) {
+		/* We need to send the packet to every device
+		 * behind this interface.
+		 */
+		send_mcast_pkt(skb, netdev);
+	} else {
+		unsigned long flags;
+
+		get_dest_bdaddr(&lowpan_cb(skb)->addr, &addr, &addr_type);
+		eui64_addr = lowpan_cb(skb)->addr.s6_addr + 8;
+		dev = lowpan_dev(netdev);
+
+		read_lock_irqsave(&devices_lock, flags);
+		peer = peer_lookup_ba(dev, &addr, addr_type);
+		read_unlock_irqrestore(&devices_lock, flags);
+
+		BT_DBG("xmit from %s to %pMR (%pI6c) peer %p", netdev->name,
+		       &addr, &lowpan_cb(skb)->addr, peer);
+
+		if (peer && peer->conn)
+			err = send_pkt(peer->conn, netdev->dev_addr,
+				       eui64_addr, skb, netdev);
+	}
+	dev_kfree_skb(skb);
+
+	if (err)
+		BT_DBG("ERROR: xmit failed (%d)", err);
+
+	return (err < 0) ? NET_XMIT_DROP : err;
+}
+
+static const struct net_device_ops netdev_ops = {
+	.ndo_start_xmit		= bt_xmit,
+};
+
+static struct header_ops header_ops = {
+	.create	= header_create,
+};
+
+static void netdev_setup(struct net_device *dev)
+{
+	dev->addr_len		= EUI64_ADDR_LEN;
+	dev->type		= ARPHRD_6LOWPAN;
+
+	dev->hard_header_len	= 0;
+	dev->needed_tailroom	= 0;
+	dev->mtu		= IPV6_MIN_MTU;
+	dev->tx_queue_len	= 0;
+	dev->flags		= IFF_RUNNING | IFF_POINTOPOINT;
+	dev->watchdog_timeo	= 0;
+
+	dev->netdev_ops		= &netdev_ops;
+	dev->header_ops		= &header_ops;
+	dev->destructor		= free_netdev;
+}
+
+static struct device_type bt_type = {
+	.name	= "bluetooth",
+};
+
+static void set_addr(u8 *eui, u8 *addr, u8 addr_type)
+{
+	/* addr is the BT address in little-endian format */
+	eui[0] = addr[5];
+	eui[1] = addr[4];
+	eui[2] = addr[3];
+	eui[3] = 0xFF;
+	eui[4] = 0xFE;
+	eui[5] = addr[2];
+	eui[6] = addr[1];
+	eui[7] = addr[0];
+
+	eui[0] ^= 2;
+
+	/* Universal/local bit set, RFC 4291 */
+	if (addr_type == ADDR_LE_DEV_PUBLIC)
+		eui[0] |= 1;
+	else
+		eui[0] &= ~1;
+}
+
+static void set_dev_addr(struct net_device *netdev, bdaddr_t *addr,
+		         u8 addr_type)
+{
+	netdev->addr_assign_type = NET_ADDR_PERM;
+	set_addr(netdev->dev_addr, addr->b, addr_type);
+	netdev->dev_addr[0] ^= 2;
+}
+
+static void ifup(struct net_device *netdev)
+{
+	int err;
+
+	rtnl_lock();
+	err = dev_open(netdev);
+	if (err < 0)
+		BT_INFO("iface %s cannot be opened (%d)", netdev->name, err);
+	rtnl_unlock();
+}
+
+static void do_notify_peers(struct work_struct *work)
+{
+	struct lowpan_dev *dev = container_of(work, struct lowpan_dev,
+					      notify_peers.work);
+
+	netdev_notify_peers(dev->netdev); /* send neighbour adv at startup */
+}
+
+static bool is_bt_6lowpan(struct hci_conn *hcon)
+{
+	if (hcon->type != LE_LINK)
+		return false;
+
+	return test_bit(HCI_CONN_6LOWPAN, &hcon->flags);
+}
+
+static int add_peer_conn(struct l2cap_conn *conn, struct lowpan_dev *dev)
+{
+	struct lowpan_peer *peer;
+	unsigned long flags;
+
+	peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
+	if (!peer)
+		return -ENOMEM;
+
+	peer->conn = conn;
+	memset(&peer->peer_addr, 0, sizeof(struct in6_addr));
+
+	/* RFC 2464 ch. 5 */
+	peer->peer_addr.s6_addr[0] = 0xFE;
+	peer->peer_addr.s6_addr[1] = 0x80;
+	set_addr((u8 *)&peer->peer_addr.s6_addr + 8, conn->hcon->dst.b,
+	         conn->hcon->dst_type);
+
+	memcpy(&peer->eui64_addr, (u8 *)&peer->peer_addr.s6_addr + 8,
+	       EUI64_ADDR_LEN);
+	peer->eui64_addr[0] ^= 2; /* second bit-flip (Universe/Local)
+				   * is done according RFC2464
+				   */
+
+	raw_dump_inline(__func__, "peer IPv6 address",
+			(unsigned char *)&peer->peer_addr, 16);
+	raw_dump_inline(__func__, "peer EUI64 address", peer->eui64_addr, 8);
+
+	write_lock_irqsave(&devices_lock, flags);
+	INIT_LIST_HEAD(&peer->list);
+	peer_add(dev, peer);
+	write_unlock_irqrestore(&devices_lock, flags);
+
+	/* Notifying peers about us needs to be done without locks held */
+	INIT_DELAYED_WORK(&dev->notify_peers, do_notify_peers);
+	schedule_delayed_work(&dev->notify_peers, msecs_to_jiffies(100));
+
+	return 0;
+}
+
+/* This gets called when BT LE 6LoWPAN device is connected. We then
+ * create network device that acts as a proxy between BT LE device
+ * and kernel network stack.
+ */
+int bt_6lowpan_add_conn(struct l2cap_conn *conn)
+{
+	struct lowpan_peer *peer = NULL;
+	struct lowpan_dev *dev;
+	struct net_device *netdev;
+	int err = 0;
+	unsigned long flags;
+
+	if (!is_bt_6lowpan(conn->hcon))
+		return 0;
+
+	peer = lookup_peer(conn);
+	if (peer)
+		return -EEXIST;
+
+	dev = lookup_dev(conn);
+	if (dev)
+		return add_peer_conn(conn, dev);
+
+	netdev = alloc_netdev(sizeof(*dev), IFACE_NAME_TEMPLATE, netdev_setup);
+	if (!netdev)
+		return -ENOMEM;
+
+	set_dev_addr(netdev, &conn->hcon->src, conn->hcon->src_type);
+
+	netdev->netdev_ops = &netdev_ops;
+	SET_NETDEV_DEV(netdev, &conn->hcon->dev);
+	SET_NETDEV_DEVTYPE(netdev, &bt_type);
+
+	err = register_netdev(netdev);
+	if (err < 0) {
+		BT_INFO("register_netdev failed %d", err);
+		free_netdev(netdev);
+		goto out;
+	}
+
+	BT_DBG("ifindex %d peer bdaddr %pMR my addr %pMR",
+	       netdev->ifindex, &conn->hcon->dst, &conn->hcon->src);
+	set_bit(__LINK_STATE_PRESENT, &netdev->state);
+
+	dev = netdev_priv(netdev);
+	dev->netdev = netdev;
+	dev->hdev = conn->hcon->hdev;
+	INIT_LIST_HEAD(&dev->peers);
+
+	write_lock_irqsave(&devices_lock, flags);
+	INIT_LIST_HEAD(&dev->list);
+	list_add(&dev->list, &bt_6lowpan_devices);
+	write_unlock_irqrestore(&devices_lock, flags);
+
+	ifup(netdev);
+
+	return add_peer_conn(conn, dev);
+
+out:
+	return err;
+}
+
+static void delete_netdev(struct work_struct *work)
+{
+	struct lowpan_dev *entry = container_of(work, struct lowpan_dev,
+						delete_netdev);
+
+	unregister_netdev(entry->netdev);
+
+	/* The entry pointer is deleted in device_event() */
+}
+
+int bt_6lowpan_del_conn(struct l2cap_conn *conn)
+{
+	struct lowpan_dev *entry, *tmp;
+	struct lowpan_dev *dev = NULL;
+	struct lowpan_peer *peer;
+	int err = -ENOENT;
+	unsigned long flags;
+	bool last = false;
+
+	if (!conn || !is_bt_6lowpan(conn->hcon))
+		return 0;
+
+	write_lock_irqsave(&devices_lock, flags);
+
+	list_for_each_entry_safe(entry, tmp, &bt_6lowpan_devices, list) {
+		dev = lowpan_dev(entry->netdev);
+		peer = peer_lookup_conn(dev, conn);
+		if (peer) {
+			last = peer_del(dev, peer);
+			err = 0;
+			break;
+		}
+	}
+
+	if (!err && last && dev && !atomic_read(&dev->peer_count)) {
+		write_unlock_irqrestore(&devices_lock, flags);
+
+		cancel_delayed_work_sync(&dev->notify_peers);
+
+		/* bt_6lowpan_del_conn() is called with hci dev lock held which
+		 * means that we must delete the netdevice in worker thread.
+		 */
+		INIT_WORK(&entry->delete_netdev, delete_netdev);
+		schedule_work(&entry->delete_netdev);
+	} else {
+		write_unlock_irqrestore(&devices_lock, flags);
+	}
+
+	return err;
+}
+
+static int device_event(struct notifier_block *unused,
+			unsigned long event, void *ptr)
+{
+	struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
+	struct lowpan_dev *entry, *tmp;
+	unsigned long flags;
+
+	if (netdev->type != ARPHRD_6LOWPAN)
+		return NOTIFY_DONE;
+
+	switch (event) {
+	case NETDEV_UNREGISTER:
+		write_lock_irqsave(&devices_lock, flags);
+		list_for_each_entry_safe(entry, tmp, &bt_6lowpan_devices,
+					 list) {
+			if (entry->netdev == netdev) {
+				list_del(&entry->list);
+				kfree(entry);
+				break;
+			}
+		}
+		write_unlock_irqrestore(&devices_lock, flags);
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block bt_6lowpan_dev_notifier = {
+	.notifier_call = device_event,
+};
+
+int bt_6lowpan_init(void)
+{
+	return register_netdevice_notifier(&bt_6lowpan_dev_notifier);
+}
+
+void bt_6lowpan_cleanup(void)
+{
+	unregister_netdevice_notifier(&bt_6lowpan_dev_notifier);
+}
diff --git a/net/bluetooth/6lowpan.h b/net/bluetooth/6lowpan.h
new file mode 100644
index 000000000000..680eac808d74
--- /dev/null
+++ b/net/bluetooth/6lowpan.h
@@ -0,0 +1,26 @@
+/*
+   Copyright (c) 2013 Intel Corp.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 and
+   only version 2 as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#ifndef __6LOWPAN_H
+#define __6LOWPAN_H
+
+#include <linux/skbuff.h>
+#include <net/bluetooth/l2cap.h>
+
+int bt_6lowpan_recv(struct l2cap_conn *conn, struct sk_buff *skb);
+int bt_6lowpan_add_conn(struct l2cap_conn *conn);
+int bt_6lowpan_del_conn(struct l2cap_conn *conn);
+int bt_6lowpan_init(void);
+void bt_6lowpan_cleanup(void);
+
+#endif /* __6LOWPAN_H */
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index d3f3f7b1d32c..985b56070d26 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -12,6 +12,7 @@ menuconfig BT
 	select CRYPTO_AES
 	select CRYPTO_ECB
 	select CRYPTO_SHA256
+	select 6LOWPAN_IPHC
 	help
 	  Bluetooth is low-cost, low-power, short-range wireless technology.
 	  It was designed as a replacement for cables and other short-range
diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
index 6a791e73e39d..80cb215826e8 100644
--- a/net/bluetooth/Makefile
+++ b/net/bluetooth/Makefile
@@ -10,6 +10,6 @@ obj-$(CONFIG_BT_HIDP)	+= hidp/
 
 bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
 	hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o sco.o lib.o \
-	a2mp.o amp.o
+	a2mp.o amp.o 6lowpan.o
 
 subdir-ccflags-y += -D__CHECK_ENDIAN__
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index 56ca494621c6..0c5866bb49b6 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -31,7 +31,7 @@
 #include <net/bluetooth/bluetooth.h>
 #include <linux/proc_fs.h>
 
-#define VERSION "2.17"
+#define VERSION "2.18"
 
 /* Bluetooth sockets */
 #define BT_MAX_PROTO	8
diff --git a/net/bluetooth/bnep/bnep.h b/net/bluetooth/bnep/bnep.h
index e7ee5314f39a..5a5b16f365e9 100644
--- a/net/bluetooth/bnep/bnep.h
+++ b/net/bluetooth/bnep/bnep.h
@@ -12,8 +12,7 @@
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+  along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef _BNEP_H
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 6ccc4eb9e55e..5e8663c194c1 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -636,6 +636,49 @@ static int conn_max_interval_get(void *data, u64 *val)
 DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
 			conn_max_interval_set, "%llu\n");
 
+static ssize_t lowpan_read(struct file *file, char __user *user_buf,
+			   size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags) ? 'Y' : 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t lowpan_write(struct file *fp, const char __user *user_buffer,
+			    size_t count, loff_t *position)
+{
+	struct hci_dev *hdev = fp->private_data;
+	bool enable;
+	char buf[32];
+	size_t buf_size = min(count, (sizeof(buf)-1));
+
+	if (copy_from_user(buf, user_buffer, buf_size))
+		return -EFAULT;
+
+	buf[buf_size] = '\0';
+
+	if (strtobool(buf, &enable) < 0)
+		return -EINVAL;
+
+	if (enable == test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags))
+		return -EALREADY;
+
+	change_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags);
+
+	return count;
+}
+
+static const struct file_operations lowpan_debugfs_fops = {
+	.open		= simple_open,
+	.read		= lowpan_read,
+	.write		= lowpan_write,
+	.llseek		= default_llseek,
+};
+
 /* ---- HCI requests ---- */
 
 static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
@@ -1228,7 +1271,7 @@ static void hci_set_event_mask_page_2(struct hci_request *req)
 	/* If Connectionless Slave Broadcast master role is supported
 	 * enable all necessary events for it.
 	 */
-	if (hdev->features[2][0] & 0x01) {
+	if (lmp_csb_master_capable(hdev)) {
 		events[1] |= 0x40;	/* Triggered Clock Capture */
 		events[1] |= 0x80;	/* Synchronization Train Complete */
 		events[2] |= 0x10;	/* Slave Page Response Timeout */
@@ -1238,7 +1281,7 @@ static void hci_set_event_mask_page_2(struct hci_request *req)
 	/* If Connectionless Slave Broadcast slave role is supported
 	 * enable all necessary events for it.
 	 */
-	if (hdev->features[2][0] & 0x02) {
+	if (lmp_csb_slave_capable(hdev)) {
 		events[2] |= 0x01;	/* Synchronization Train Received */
 		events[2] |= 0x02;	/* CSB Receive */
 		events[2] |= 0x04;	/* CSB Timeout */
@@ -1261,8 +1304,13 @@ static void hci_init3_req(struct hci_request *req, unsigned long opt)
 	 * as supported send it. If not supported assume that the controller
 	 * does not have actual support for stored link keys which makes this
 	 * command redundant anyway.
+	 *
+	 * Some controllers indicate that they support handling deleting
+	 * stored link keys, but they don't. The quirk lets a driver
+	 * just disable this command.
 	 */
-	if (hdev->commands[6] & 0x80) {
+	if (hdev->commands[6] & 0x80 &&
+	    !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
 		struct hci_cp_delete_stored_link_key cp;
 
 		bacpy(&cp.bdaddr, BDADDR_ANY);
@@ -1275,15 +1323,17 @@ static void hci_init3_req(struct hci_request *req, unsigned long opt)
 		hci_setup_link_policy(req);
 
 	if (lmp_le_capable(hdev)) {
-		/* If the controller has a public BD_ADDR, then by
-		 * default use that one. If this is a LE only
-		 * controller without one, default to the random
-		 * address.
-		 */
-		if (bacmp(&hdev->bdaddr, BDADDR_ANY))
-			hdev->own_addr_type = ADDR_LE_DEV_PUBLIC;
-		else
-			hdev->own_addr_type = ADDR_LE_DEV_RANDOM;
+		if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
+			/* If the controller has a public BD_ADDR, then
+			 * by default use that one. If this is a LE only
+			 * controller without a public address, default
+			 * to the random address.
+			 */
+			if (bacmp(&hdev->bdaddr, BDADDR_ANY))
+				hdev->own_addr_type = ADDR_LE_DEV_PUBLIC;
+			else
+				hdev->own_addr_type = ADDR_LE_DEV_RANDOM;
+		}
 
 		hci_set_le_support(req);
 	}
@@ -1307,7 +1357,7 @@ static void hci_init4_req(struct hci_request *req, unsigned long opt)
 		hci_set_event_mask_page_2(req);
 
 	/* Check for Synchronization Train support */
-	if (hdev->features[2][0] & 0x04)
+	if (lmp_sync_train_capable(hdev))
 		hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
 }
 
@@ -1404,6 +1454,8 @@ static int __hci_init(struct hci_dev *hdev)
 				    hdev, &conn_min_interval_fops);
 		debugfs_create_file("conn_max_interval", 0644, hdev->debugfs,
 				    hdev, &conn_max_interval_fops);
+		debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,
+				    &lowpan_debugfs_fops);
 	}
 
 	return 0;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 5935f748c0f9..5f812455a450 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -486,7 +486,10 @@ static void hci_cc_read_local_commands(struct hci_dev *hdev,
 
 	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 
-	if (!rp->status)
+	if (rp->status)
+		return;
+
+	if (test_bit(HCI_SETUP, &hdev->dev_flags))
 		memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
 }
 
@@ -538,12 +541,6 @@ static void hci_cc_read_local_features(struct hci_dev *hdev,
 
 	if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
 		hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
-
-	BT_DBG("%s features 0x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x", hdev->name,
-	       hdev->features[0][0], hdev->features[0][1],
-	       hdev->features[0][2], hdev->features[0][3],
-	       hdev->features[0][4], hdev->features[0][5],
-	       hdev->features[0][6], hdev->features[0][7]);
 }
 
 static void hci_cc_read_local_ext_features(struct hci_dev *hdev,
@@ -1782,7 +1779,9 @@ static u8 hci_to_mgmt_reason(u8 err)
 static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct hci_ev_disconn_complete *ev = (void *) skb->data;
+	u8 reason = hci_to_mgmt_reason(ev->reason);
 	struct hci_conn *conn;
+	u8 type;
 
 	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
 
@@ -1792,43 +1791,38 @@ static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	if (!conn)
 		goto unlock;
 
-	if (ev->status == 0)
-		conn->state = BT_CLOSED;
+	if (ev->status) {
+		mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
+				       conn->dst_type, ev->status);
+		goto unlock;
+	}
 
-	if (test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags) &&
-	    (conn->type == ACL_LINK || conn->type == LE_LINK)) {
-		if (ev->status) {
-			mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
-					       conn->dst_type, ev->status);
-		} else {
-			u8 reason = hci_to_mgmt_reason(ev->reason);
+	conn->state = BT_CLOSED;
 
-			mgmt_device_disconnected(hdev, &conn->dst, conn->type,
-						 conn->dst_type, reason);
-		}
-	}
+	if (test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+		mgmt_device_disconnected(hdev, &conn->dst, conn->type,
+					 conn->dst_type, reason);
 
-	if (ev->status == 0) {
-		u8 type = conn->type;
+	if (conn->type == ACL_LINK && conn->flush_key)
+		hci_remove_link_key(hdev, &conn->dst);
 
-		if (type == ACL_LINK && conn->flush_key)
-			hci_remove_link_key(hdev, &conn->dst);
-		hci_proto_disconn_cfm(conn, ev->reason);
-		hci_conn_del(conn);
+	type = conn->type;
 
-		/* Re-enable advertising if necessary, since it might
-		 * have been disabled by the connection. From the
-		 * HCI_LE_Set_Advertise_Enable command description in
-		 * the core specification (v4.0):
-		 * "The Controller shall continue advertising until the Host
-		 * issues an LE_Set_Advertise_Enable command with
-		 * Advertising_Enable set to 0x00 (Advertising is disabled)
-		 * or until a connection is created or until the Advertising
-		 * is timed out due to Directed Advertising."
-		 */
-		if (type == LE_LINK)
-			mgmt_reenable_advertising(hdev);
-	}
+	hci_proto_disconn_cfm(conn, ev->reason);
+	hci_conn_del(conn);
+
+	/* Re-enable advertising if necessary, since it might
+	 * have been disabled by the connection. From the
+	 * HCI_LE_Set_Advertise_Enable command description in
+	 * the core specification (v4.0):
+	 * "The Controller shall continue advertising until the Host
+	 * issues an LE_Set_Advertise_Enable command with
+	 * Advertising_Enable set to 0x00 (Advertising is disabled)
+	 * or until a connection is created or until the Advertising
+	 * is timed out due to Directed Advertising."
+	 */
+	if (type == LE_LINK)
+		mgmt_reenable_advertising(hdev);
 
 unlock:
 	hci_dev_unlock(hdev);
@@ -3539,6 +3533,9 @@ static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	conn->handle = __le16_to_cpu(ev->handle);
 	conn->state = BT_CONNECTED;
 
+	if (test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags))
+		set_bit(HCI_CONN_6LOWPAN, &conn->flags);
+
 	hci_conn_add_sysfs(conn);
 
 	hci_proto_connect_cfm(conn, ev->status);
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 4af3821df880..b0ad2c752d73 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -40,6 +40,7 @@
 #include "smp.h"
 #include "a2mp.h"
 #include "amp.h"
+#include "6lowpan.h"
 
 bool disable_ertm;
 
@@ -49,6 +50,9 @@ static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP | L2CAP_FC_CONNLESS, };
 static LIST_HEAD(chan_list);
 static DEFINE_RWLOCK(chan_list_lock);
 
+static u16 le_max_credits = L2CAP_LE_MAX_CREDITS;
+static u16 le_default_mps = L2CAP_LE_DEFAULT_MPS;
+
 static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
 				       u8 code, u8 ident, u16 dlen, void *data);
 static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
@@ -213,9 +217,14 @@ int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid)
 
 static u16 l2cap_alloc_cid(struct l2cap_conn *conn)
 {
-	u16 cid = L2CAP_CID_DYN_START;
+	u16 cid, dyn_end;
+
+	if (conn->hcon->type == LE_LINK)
+		dyn_end = L2CAP_CID_LE_DYN_END;
+	else
+		dyn_end = L2CAP_CID_DYN_END;
 
-	for (; cid < L2CAP_CID_DYN_END; cid++) {
+	for (cid = L2CAP_CID_DYN_START; cid < dyn_end; cid++) {
 		if (!__l2cap_get_chan_by_scid(conn, cid))
 			return cid;
 	}
@@ -490,6 +499,18 @@ void l2cap_chan_set_defaults(struct l2cap_chan *chan)
 	set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
 }
 
+static void l2cap_le_flowctl_init(struct l2cap_chan *chan)
+{
+	chan->sdu = NULL;
+	chan->sdu_last_frag = NULL;
+	chan->sdu_len = 0;
+	chan->tx_credits = 0;
+	chan->rx_credits = le_max_credits;
+	chan->mps = min_t(u16, chan->imtu, L2CAP_LE_DEFAULT_MPS);
+
+	skb_queue_head_init(&chan->tx_q);
+}
+
 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
 {
 	BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn,
@@ -502,12 +523,12 @@ void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
 	switch (chan->chan_type) {
 	case L2CAP_CHAN_CONN_ORIENTED:
 		if (conn->hcon->type == LE_LINK) {
-			/* LE connection */
-			chan->omtu = L2CAP_DEFAULT_MTU;
-			if (chan->dcid == L2CAP_CID_ATT)
+			if (chan->dcid == L2CAP_CID_ATT) {
+				chan->omtu = L2CAP_DEFAULT_MTU;
 				chan->scid = L2CAP_CID_ATT;
-			else
+			} else {
 				chan->scid = l2cap_alloc_cid(conn);
+			}
 		} else {
 			/* Alloc CID for connection-oriented socket */
 			chan->scid = l2cap_alloc_cid(conn);
@@ -597,6 +618,10 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
 	case L2CAP_MODE_BASIC:
 		break;
 
+	case L2CAP_MODE_LE_FLOWCTL:
+		skb_queue_purge(&chan->tx_q);
+		break;
+
 	case L2CAP_MODE_ERTM:
 		__clear_retrans_timer(chan);
 		__clear_monitor_timer(chan);
@@ -617,6 +642,50 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
 	return;
 }
 
+static void l2cap_chan_le_connect_reject(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_le_conn_rsp rsp;
+	u16 result;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
+		result = L2CAP_CR_AUTHORIZATION;
+	else
+		result = L2CAP_CR_BAD_PSM;
+
+	l2cap_state_change(chan, BT_DISCONN);
+
+	rsp.dcid    = cpu_to_le16(chan->scid);
+	rsp.mtu     = cpu_to_le16(chan->imtu);
+	rsp.mps     = cpu_to_le16(chan->mps);
+	rsp.credits = cpu_to_le16(chan->rx_credits);
+	rsp.result  = cpu_to_le16(result);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
+		       &rsp);
+}
+
+static void l2cap_chan_connect_reject(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_conn_rsp rsp;
+	u16 result;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
+		result = L2CAP_CR_SEC_BLOCK;
+	else
+		result = L2CAP_CR_BAD_PSM;
+
+	l2cap_state_change(chan, BT_DISCONN);
+
+	rsp.scid   = cpu_to_le16(chan->dcid);
+	rsp.dcid   = cpu_to_le16(chan->scid);
+	rsp.result = cpu_to_le16(result);
+	rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+}
+
 void l2cap_chan_close(struct l2cap_chan *chan, int reason)
 {
 	struct l2cap_conn *conn = chan->conn;
@@ -630,8 +699,10 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
 
 	case BT_CONNECTED:
 	case BT_CONFIG:
-		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED &&
-		    conn->hcon->type == ACL_LINK) {
+		/* ATT uses L2CAP_CHAN_CONN_ORIENTED so we must also
+		 * check for chan->psm.
+		 */
+		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && chan->psm) {
 			__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
 			l2cap_send_disconn_req(chan, reason);
 		} else
@@ -639,24 +710,11 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
 		break;
 
 	case BT_CONNECT2:
-		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED &&
-		    conn->hcon->type == ACL_LINK) {
-			struct l2cap_conn_rsp rsp;
-			__u16 result;
-
-			if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
-				result = L2CAP_CR_SEC_BLOCK;
-			else
-				result = L2CAP_CR_BAD_PSM;
-
-			l2cap_state_change(chan, BT_DISCONN);
-
-			rsp.scid   = cpu_to_le16(chan->dcid);
-			rsp.dcid   = cpu_to_le16(chan->scid);
-			rsp.result = cpu_to_le16(result);
-			rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO);
-			l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP,
-				       sizeof(rsp), &rsp);
+		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) {
+			if (conn->hcon->type == ACL_LINK)
+				l2cap_chan_connect_reject(chan);
+			else if (conn->hcon->type == LE_LINK)
+				l2cap_chan_le_connect_reject(chan);
 		}
 
 		l2cap_chan_del(chan, reason);
@@ -726,6 +784,9 @@ int l2cap_chan_check_security(struct l2cap_chan *chan)
 	struct l2cap_conn *conn = chan->conn;
 	__u8 auth_type;
 
+	if (conn->hcon->type == LE_LINK)
+		return smp_conn_security(conn->hcon, chan->sec_level);
+
 	auth_type = l2cap_get_auth_type(chan);
 
 	return hci_conn_security(conn->hcon, chan->sec_level, auth_type);
@@ -1152,16 +1213,57 @@ static void l2cap_chan_ready(struct l2cap_chan *chan)
 	chan->conf_state = 0;
 	__clear_chan_timer(chan);
 
+	if (chan->mode == L2CAP_MODE_LE_FLOWCTL && !chan->tx_credits)
+		chan->ops->suspend(chan);
+
 	chan->state = BT_CONNECTED;
 
 	chan->ops->ready(chan);
 }
 
+static void l2cap_le_connect(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_le_conn_req req;
+
+	if (test_and_set_bit(FLAG_LE_CONN_REQ_SENT, &chan->flags))
+		return;
+
+	req.psm     = chan->psm;
+	req.scid    = cpu_to_le16(chan->scid);
+	req.mtu     = cpu_to_le16(chan->imtu);
+	req.mps     = cpu_to_le16(chan->mps);
+	req.credits = cpu_to_le16(chan->rx_credits);
+
+	chan->ident = l2cap_get_ident(conn);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_REQ,
+		       sizeof(req), &req);
+}
+
+static void l2cap_le_start(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	if (!smp_conn_security(conn->hcon, chan->sec_level))
+		return;
+
+	if (!chan->psm) {
+		l2cap_chan_ready(chan);
+		return;
+	}
+
+	if (chan->state == BT_CONNECT)
+		l2cap_le_connect(chan);
+}
+
 static void l2cap_start_connection(struct l2cap_chan *chan)
 {
 	if (__amp_capable(chan)) {
 		BT_DBG("chan %p AMP capable: discover AMPs", chan);
 		a2mp_discover_amp(chan);
+	} else if (chan->conn->hcon->type == LE_LINK) {
+		l2cap_le_start(chan);
 	} else {
 		l2cap_send_conn_req(chan);
 	}
@@ -1172,7 +1274,7 @@ static void l2cap_do_start(struct l2cap_chan *chan)
 	struct l2cap_conn *conn = chan->conn;
 
 	if (conn->hcon->type == LE_LINK) {
-		l2cap_chan_ready(chan);
+		l2cap_le_start(chan);
 		return;
 	}
 
@@ -1367,6 +1469,8 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn)
 
 	BT_DBG("");
 
+	bt_6lowpan_add_conn(conn);
+
 	/* Check if we have socket listening on cid */
 	pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_ATT,
 					  &hcon->src, &hcon->dst);
@@ -1430,9 +1534,7 @@ static void l2cap_conn_ready(struct l2cap_conn *conn)
 		}
 
 		if (hcon->type == LE_LINK) {
-			if (smp_conn_security(hcon, chan->sec_level))
-				l2cap_chan_ready(chan);
-
+			l2cap_le_start(chan);
 		} else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
 			l2cap_chan_ready(chan);
 
@@ -1703,7 +1805,8 @@ EXPORT_SYMBOL(l2cap_conn_put);
  */
 static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
 						   bdaddr_t *src,
-						   bdaddr_t *dst)
+						   bdaddr_t *dst,
+						   u8 link_type)
 {
 	struct l2cap_chan *c, *c1 = NULL;
 
@@ -1713,6 +1816,12 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
 		if (state && c->state != state)
 			continue;
 
+		if (link_type == ACL_LINK && c->src_type != BDADDR_BREDR)
+			continue;
+
+		if (link_type == LE_LINK && c->src_type == BDADDR_BREDR)
+			continue;
+
 		if (c->psm == psm) {
 			int src_match, dst_match;
 			int src_any, dst_any;
@@ -1739,6 +1848,18 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
 	return c1;
 }
 
+static bool is_valid_psm(u16 psm, u8 dst_type)
+{
+	if (!psm)
+		return false;
+
+	if (bdaddr_type_is_le(dst_type))
+		return (psm <= 0x00ff);
+
+	/* PSM must be odd and lsb of upper byte must be 0 */
+	return ((psm & 0x0101) == 0x0001);
+}
+
 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
 		       bdaddr_t *dst, u8 dst_type)
 {
@@ -1759,8 +1880,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
 
 	l2cap_chan_lock(chan);
 
-	/* PSM must be odd and lsb of upper byte must be 0 */
-	if ((__le16_to_cpu(psm) & 0x0101) != 0x0001 && !cid &&
+	if (!is_valid_psm(__le16_to_cpu(psm), dst_type) && !cid &&
 	    chan->chan_type != L2CAP_CHAN_RAW) {
 		err = -EINVAL;
 		goto done;
@@ -1774,6 +1894,9 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
 	switch (chan->mode) {
 	case L2CAP_MODE_BASIC:
 		break;
+	case L2CAP_MODE_LE_FLOWCTL:
+		l2cap_le_flowctl_init(chan);
+		break;
 	case L2CAP_MODE_ERTM:
 	case L2CAP_MODE_STREAMING:
 		if (!disable_ertm)
@@ -2432,6 +2555,89 @@ static int l2cap_segment_sdu(struct l2cap_chan *chan,
 	return 0;
 }
 
+static struct sk_buff *l2cap_create_le_flowctl_pdu(struct l2cap_chan *chan,
+						   struct msghdr *msg,
+						   size_t len, u16 sdulen)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct sk_buff *skb;
+	int err, count, hlen;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("chan %p len %zu", chan, len);
+
+	if (!conn)
+		return ERR_PTR(-ENOTCONN);
+
+	hlen = L2CAP_HDR_SIZE;
+
+	if (sdulen)
+		hlen += L2CAP_SDULEN_SIZE;
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+
+	skb = chan->ops->alloc_skb(chan, count + hlen,
+				   msg->msg_flags & MSG_DONTWAIT);
+	if (IS_ERR(skb))
+		return skb;
+
+	/* Create L2CAP header */
+	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(chan->dcid);
+	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+
+	if (sdulen)
+		put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE));
+
+	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+
+	return skb;
+}
+
+static int l2cap_segment_le_sdu(struct l2cap_chan *chan,
+				struct sk_buff_head *seg_queue,
+				struct msghdr *msg, size_t len)
+{
+	struct sk_buff *skb;
+	size_t pdu_len;
+	u16 sdu_len;
+
+	BT_DBG("chan %p, msg %p, len %zu", chan, msg, len);
+
+	pdu_len = chan->conn->mtu - L2CAP_HDR_SIZE;
+
+	pdu_len = min_t(size_t, pdu_len, chan->remote_mps);
+
+	sdu_len = len;
+	pdu_len -= L2CAP_SDULEN_SIZE;
+
+	while (len > 0) {
+		if (len <= pdu_len)
+			pdu_len = len;
+
+		skb = l2cap_create_le_flowctl_pdu(chan, msg, pdu_len, sdu_len);
+		if (IS_ERR(skb)) {
+			__skb_queue_purge(seg_queue);
+			return PTR_ERR(skb);
+		}
+
+		__skb_queue_tail(seg_queue, skb);
+
+		len -= pdu_len;
+
+		if (sdu_len) {
+			sdu_len = 0;
+			pdu_len += L2CAP_SDULEN_SIZE;
+		}
+	}
+
+	return 0;
+}
+
 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 		    u32 priority)
 {
@@ -2453,6 +2659,40 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 	}
 
 	switch (chan->mode) {
+	case L2CAP_MODE_LE_FLOWCTL:
+		/* Check outgoing MTU */
+		if (len > chan->omtu)
+			return -EMSGSIZE;
+
+		if (!chan->tx_credits)
+			return -EAGAIN;
+
+		__skb_queue_head_init(&seg_queue);
+
+		err = l2cap_segment_le_sdu(chan, &seg_queue, msg, len);
+
+		if (chan->state != BT_CONNECTED) {
+			__skb_queue_purge(&seg_queue);
+			err = -ENOTCONN;
+		}
+
+		if (err)
+			return err;
+
+		skb_queue_splice_tail_init(&seg_queue, &chan->tx_q);
+
+		while (chan->tx_credits && !skb_queue_empty(&chan->tx_q)) {
+			l2cap_do_send(chan, skb_dequeue(&chan->tx_q));
+			chan->tx_credits--;
+		}
+
+		if (!chan->tx_credits)
+			chan->ops->suspend(chan);
+
+		err = len;
+
+		break;
+
 	case L2CAP_MODE_BASIC:
 		/* Check outgoing MTU */
 		if (len > chan->omtu)
@@ -3592,6 +3832,23 @@ static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data,
 	return ptr - data;
 }
 
+void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan)
+{
+	struct l2cap_le_conn_rsp rsp;
+	struct l2cap_conn *conn = chan->conn;
+
+	BT_DBG("chan %p", chan);
+
+	rsp.dcid    = cpu_to_le16(chan->scid);
+	rsp.mtu     = cpu_to_le16(chan->imtu);
+	rsp.mps     = cpu_to_le16(chan->mps);
+	rsp.credits = cpu_to_le16(chan->rx_credits);
+	rsp.result  = __constant_cpu_to_le16(L2CAP_CR_SUCCESS);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
+		       &rsp);
+}
+
 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan)
 {
 	struct l2cap_conn_rsp rsp;
@@ -3713,7 +3970,7 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
 
 	/* Check if we have socket listening on psm */
 	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
-					 &conn->hcon->dst);
+					 &conn->hcon->dst, ACL_LINK);
 	if (!pchan) {
 		result = L2CAP_CR_BAD_PSM;
 		goto sendresp;
@@ -5155,18 +5412,17 @@ static inline int l2cap_check_conn_param(u16 min, u16 max, u16 latency,
 
 static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn,
 					      struct l2cap_cmd_hdr *cmd,
-					      u8 *data)
+					      u16 cmd_len, u8 *data)
 {
 	struct hci_conn *hcon = conn->hcon;
 	struct l2cap_conn_param_update_req *req;
 	struct l2cap_conn_param_update_rsp rsp;
-	u16 min, max, latency, to_multiplier, cmd_len;
+	u16 min, max, latency, to_multiplier;
 	int err;
 
 	if (!(hcon->link_mode & HCI_LM_MASTER))
 		return -EINVAL;
 
-	cmd_len = __le16_to_cpu(cmd->len);
 	if (cmd_len != sizeof(struct l2cap_conn_param_update_req))
 		return -EPROTO;
 
@@ -5196,6 +5452,65 @@ static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn,
 	return 0;
 }
 
+static int l2cap_le_connect_rsp(struct l2cap_conn *conn,
+				struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				u8 *data)
+{
+	struct l2cap_le_conn_rsp *rsp = (struct l2cap_le_conn_rsp *) data;
+	u16 dcid, mtu, mps, credits, result;
+	struct l2cap_chan *chan;
+	int err;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	dcid    = __le16_to_cpu(rsp->dcid);
+	mtu     = __le16_to_cpu(rsp->mtu);
+	mps     = __le16_to_cpu(rsp->mps);
+	credits = __le16_to_cpu(rsp->credits);
+	result  = __le16_to_cpu(rsp->result);
+
+	if (result == L2CAP_CR_SUCCESS && (mtu < 23 || mps < 23))
+		return -EPROTO;
+
+	BT_DBG("dcid 0x%4.4x mtu %u mps %u credits %u result 0x%2.2x",
+	       dcid, mtu, mps, credits, result);
+
+	mutex_lock(&conn->chan_lock);
+
+	chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
+	if (!chan) {
+		err = -EBADSLT;
+		goto unlock;
+	}
+
+	err = 0;
+
+	l2cap_chan_lock(chan);
+
+	switch (result) {
+	case L2CAP_CR_SUCCESS:
+		chan->ident = 0;
+		chan->dcid = dcid;
+		chan->omtu = mtu;
+		chan->remote_mps = mps;
+		chan->tx_credits = credits;
+		l2cap_chan_ready(chan);
+		break;
+
+	default:
+		l2cap_chan_del(chan, ECONNREFUSED);
+		break;
+	}
+
+	l2cap_chan_unlock(chan);
+
+unlock:
+	mutex_unlock(&conn->chan_lock);
+
+	return err;
+}
+
 static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
 				      struct l2cap_cmd_hdr *cmd, u16 cmd_len,
 				      u8 *data)
@@ -5276,23 +5591,235 @@ static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
 	return err;
 }
 
+static int l2cap_le_connect_req(struct l2cap_conn *conn,
+				struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				u8 *data)
+{
+	struct l2cap_le_conn_req *req = (struct l2cap_le_conn_req *) data;
+	struct l2cap_le_conn_rsp rsp;
+	struct l2cap_chan *chan, *pchan;
+	u16 dcid, scid, credits, mtu, mps;
+	__le16 psm;
+	u8 result;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	scid = __le16_to_cpu(req->scid);
+	mtu  = __le16_to_cpu(req->mtu);
+	mps  = __le16_to_cpu(req->mps);
+	psm  = req->psm;
+	dcid = 0;
+	credits = 0;
+
+	if (mtu < 23 || mps < 23)
+		return -EPROTO;
+
+	BT_DBG("psm 0x%2.2x scid 0x%4.4x mtu %u mps %u", __le16_to_cpu(psm),
+	       scid, mtu, mps);
+
+	/* Check if we have socket listening on psm */
+	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
+					 &conn->hcon->dst, LE_LINK);
+	if (!pchan) {
+		result = L2CAP_CR_BAD_PSM;
+		chan = NULL;
+		goto response;
+	}
+
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(pchan);
+
+	if (!smp_sufficient_security(conn->hcon, pchan->sec_level)) {
+		result = L2CAP_CR_AUTHENTICATION;
+		chan = NULL;
+		goto response_unlock;
+	}
+
+	/* Check if we already have channel with that dcid */
+	if (__l2cap_get_chan_by_dcid(conn, scid)) {
+		result = L2CAP_CR_NO_MEM;
+		chan = NULL;
+		goto response_unlock;
+	}
+
+	chan = pchan->ops->new_connection(pchan);
+	if (!chan) {
+		result = L2CAP_CR_NO_MEM;
+		goto response_unlock;
+	}
+
+	l2cap_le_flowctl_init(chan);
+
+	bacpy(&chan->src, &conn->hcon->src);
+	bacpy(&chan->dst, &conn->hcon->dst);
+	chan->src_type = bdaddr_type(conn->hcon, conn->hcon->src_type);
+	chan->dst_type = bdaddr_type(conn->hcon, conn->hcon->dst_type);
+	chan->psm  = psm;
+	chan->dcid = scid;
+	chan->omtu = mtu;
+	chan->remote_mps = mps;
+	chan->tx_credits = __le16_to_cpu(req->credits);
+
+	__l2cap_chan_add(conn, chan);
+	dcid = chan->scid;
+	credits = chan->rx_credits;
+
+	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
+
+	chan->ident = cmd->ident;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
+		l2cap_state_change(chan, BT_CONNECT2);
+		result = L2CAP_CR_PEND;
+		chan->ops->defer(chan);
+	} else {
+		l2cap_chan_ready(chan);
+		result = L2CAP_CR_SUCCESS;
+	}
+
+response_unlock:
+	l2cap_chan_unlock(pchan);
+	mutex_unlock(&conn->chan_lock);
+
+	if (result == L2CAP_CR_PEND)
+		return 0;
+
+response:
+	if (chan) {
+		rsp.mtu = cpu_to_le16(chan->imtu);
+		rsp.mps = cpu_to_le16(chan->mps);
+	} else {
+		rsp.mtu = 0;
+		rsp.mps = 0;
+	}
+
+	rsp.dcid    = cpu_to_le16(dcid);
+	rsp.credits = cpu_to_le16(credits);
+	rsp.result  = cpu_to_le16(result);
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_LE_CONN_RSP, sizeof(rsp), &rsp);
+
+	return 0;
+}
+
+static inline int l2cap_le_credits(struct l2cap_conn *conn,
+				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				   u8 *data)
+{
+	struct l2cap_le_credits *pkt;
+	struct l2cap_chan *chan;
+	u16 cid, credits;
+
+	if (cmd_len != sizeof(*pkt))
+		return -EPROTO;
+
+	pkt = (struct l2cap_le_credits *) data;
+	cid	= __le16_to_cpu(pkt->cid);
+	credits	= __le16_to_cpu(pkt->credits);
+
+	BT_DBG("cid 0x%4.4x credits 0x%4.4x", cid, credits);
+
+	chan = l2cap_get_chan_by_dcid(conn, cid);
+	if (!chan)
+		return -EBADSLT;
+
+	chan->tx_credits += credits;
+
+	while (chan->tx_credits && !skb_queue_empty(&chan->tx_q)) {
+		l2cap_do_send(chan, skb_dequeue(&chan->tx_q));
+		chan->tx_credits--;
+	}
+
+	if (chan->tx_credits)
+		chan->ops->resume(chan);
+
+	l2cap_chan_unlock(chan);
+
+	return 0;
+}
+
+static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
+				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				       u8 *data)
+{
+	struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data;
+	struct l2cap_chan *chan;
+
+	if (cmd_len < sizeof(*rej))
+		return -EPROTO;
+
+	mutex_lock(&conn->chan_lock);
+
+	chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
+	if (!chan)
+		goto done;
+
+	l2cap_chan_lock(chan);
+	l2cap_chan_del(chan, ECONNREFUSED);
+	l2cap_chan_unlock(chan);
+
+done:
+	mutex_unlock(&conn->chan_lock);
+	return 0;
+}
+
 static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn,
-				   struct l2cap_cmd_hdr *cmd, u8 *data)
+				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				   u8 *data)
 {
+	int err = 0;
+
+	if (!enable_lecoc) {
+		switch (cmd->code) {
+		case L2CAP_LE_CONN_REQ:
+		case L2CAP_LE_CONN_RSP:
+		case L2CAP_LE_CREDITS:
+		case L2CAP_DISCONN_REQ:
+		case L2CAP_DISCONN_RSP:
+			return -EINVAL;
+		}
+	}
+
 	switch (cmd->code) {
 	case L2CAP_COMMAND_REJ:
-		return 0;
+		l2cap_le_command_rej(conn, cmd, cmd_len, data);
+		break;
 
 	case L2CAP_CONN_PARAM_UPDATE_REQ:
-		return l2cap_conn_param_update_req(conn, cmd, data);
+		err = l2cap_conn_param_update_req(conn, cmd, cmd_len, data);
+		break;
 
 	case L2CAP_CONN_PARAM_UPDATE_RSP:
-		return 0;
+		break;
+
+	case L2CAP_LE_CONN_RSP:
+		l2cap_le_connect_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_LE_CONN_REQ:
+		err = l2cap_le_connect_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_LE_CREDITS:
+		err = l2cap_le_credits(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_DISCONN_REQ:
+		err = l2cap_disconnect_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_DISCONN_RSP:
+		l2cap_disconnect_rsp(conn, cmd, cmd_len, data);
+		break;
 
 	default:
 		BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code);
-		return -EINVAL;
+		err = -EINVAL;
+		break;
 	}
+
+	return err;
 }
 
 static inline void l2cap_le_sig_channel(struct l2cap_conn *conn,
@@ -5321,7 +5848,7 @@ static inline void l2cap_le_sig_channel(struct l2cap_conn *conn,
 		goto drop;
 	}
 
-	err = l2cap_le_sig_cmd(conn, cmd, skb->data);
+	err = l2cap_le_sig_cmd(conn, cmd, len, skb->data);
 	if (err) {
 		struct l2cap_cmd_rej_unk rej;
 
@@ -6312,6 +6839,121 @@ drop:
 	return 0;
 }
 
+static void l2cap_chan_le_send_credits(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_le_credits pkt;
+	u16 return_credits;
+
+	/* We return more credits to the sender only after the amount of
+	 * credits falls below half of the initial amount.
+	 */
+	if (chan->rx_credits >= (le_max_credits + 1) / 2)
+		return;
+
+	return_credits = le_max_credits - chan->rx_credits;
+
+	BT_DBG("chan %p returning %u credits to sender", chan, return_credits);
+
+	chan->rx_credits += return_credits;
+
+	pkt.cid     = cpu_to_le16(chan->scid);
+	pkt.credits = cpu_to_le16(return_credits);
+
+	chan->ident = l2cap_get_ident(conn);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CREDITS, sizeof(pkt), &pkt);
+}
+
+static int l2cap_le_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	int err;
+
+	if (!chan->rx_credits) {
+		BT_ERR("No credits to receive LE L2CAP data");
+		return -ENOBUFS;
+	}
+
+	if (chan->imtu < skb->len) {
+		BT_ERR("Too big LE L2CAP PDU");
+		return -ENOBUFS;
+	}
+
+	chan->rx_credits--;
+	BT_DBG("rx_credits %u -> %u", chan->rx_credits + 1, chan->rx_credits);
+
+	l2cap_chan_le_send_credits(chan);
+
+	err = 0;
+
+	if (!chan->sdu) {
+		u16 sdu_len;
+
+		sdu_len = get_unaligned_le16(skb->data);
+		skb_pull(skb, L2CAP_SDULEN_SIZE);
+
+		BT_DBG("Start of new SDU. sdu_len %u skb->len %u imtu %u",
+		       sdu_len, skb->len, chan->imtu);
+
+		if (sdu_len > chan->imtu) {
+			BT_ERR("Too big LE L2CAP SDU length received");
+			err = -EMSGSIZE;
+			goto failed;
+		}
+
+		if (skb->len > sdu_len) {
+			BT_ERR("Too much LE L2CAP data received");
+			err = -EINVAL;
+			goto failed;
+		}
+
+		if (skb->len == sdu_len)
+			return chan->ops->recv(chan, skb);
+
+		chan->sdu = skb;
+		chan->sdu_len = sdu_len;
+		chan->sdu_last_frag = skb;
+
+		return 0;
+	}
+
+	BT_DBG("SDU fragment. chan->sdu->len %u skb->len %u chan->sdu_len %u",
+	       chan->sdu->len, skb->len, chan->sdu_len);
+
+	if (chan->sdu->len + skb->len > chan->sdu_len) {
+		BT_ERR("Too much LE L2CAP data received");
+		err = -EINVAL;
+		goto failed;
+	}
+
+	append_skb_frag(chan->sdu, skb, &chan->sdu_last_frag);
+	skb = NULL;
+
+	if (chan->sdu->len == chan->sdu_len) {
+		err = chan->ops->recv(chan, chan->sdu);
+		if (!err) {
+			chan->sdu = NULL;
+			chan->sdu_last_frag = NULL;
+			chan->sdu_len = 0;
+		}
+	}
+
+failed:
+	if (err) {
+		kfree_skb(skb);
+		kfree_skb(chan->sdu);
+		chan->sdu = NULL;
+		chan->sdu_last_frag = NULL;
+		chan->sdu_len = 0;
+	}
+
+	/* We can't return an error here since we took care of the skb
+	 * freeing internally. An error return would cause the caller to
+	 * do a double-free of the skb.
+	 */
+	return 0;
+}
+
 static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid,
 			       struct sk_buff *skb)
 {
@@ -6341,6 +6983,12 @@ static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid,
 		goto drop;
 
 	switch (chan->mode) {
+	case L2CAP_MODE_LE_FLOWCTL:
+		if (l2cap_le_data_rcv(chan, skb) < 0)
+			goto drop;
+
+		goto done;
+
 	case L2CAP_MODE_BASIC:
 		/* If socket recv buffers overflows we drop data here
 		 * which is *bad* because L2CAP has to be reliable.
@@ -6380,7 +7028,8 @@ static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm,
 	if (hcon->type != ACL_LINK)
 		goto drop;
 
-	chan = l2cap_global_chan_by_psm(0, psm, &hcon->src, &hcon->dst);
+	chan = l2cap_global_chan_by_psm(0, psm, &hcon->src, &hcon->dst,
+					ACL_LINK);
 	if (!chan)
 		goto drop;
 
@@ -6473,6 +7122,10 @@ static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
 			l2cap_conn_del(conn->hcon, EACCES);
 		break;
 
+	case L2CAP_FC_6LOWPAN:
+		bt_6lowpan_recv(conn, skb);
+		break;
+
 	default:
 		l2cap_data_channel(conn, cid, skb);
 		break;
@@ -6540,6 +7193,8 @@ void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason)
 {
 	BT_DBG("hcon %p reason %d", hcon, reason);
 
+	bt_6lowpan_del_conn(hcon->l2cap_data);
+
 	l2cap_conn_del(hcon, bt_to_errno(reason));
 }
 
@@ -6612,11 +7267,10 @@ int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
 		}
 
 		if (chan->state == BT_CONNECT) {
-			if (!status) {
+			if (!status)
 				l2cap_start_connection(chan);
-			} else {
+			else
 				__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
-			}
 		} else if (chan->state == BT_CONNECT2) {
 			struct l2cap_conn_rsp rsp;
 			__u16 res, stat;
@@ -6817,11 +7471,19 @@ int __init l2cap_init(void)
 	l2cap_debugfs = debugfs_create_file("l2cap", 0444, bt_debugfs,
 					    NULL, &l2cap_debugfs_fops);
 
+	debugfs_create_u16("l2cap_le_max_credits", 0466, bt_debugfs,
+			   &le_max_credits);
+	debugfs_create_u16("l2cap_le_default_mps", 0466, bt_debugfs,
+			   &le_default_mps);
+
+	bt_6lowpan_init();
+
 	return 0;
 }
 
 void l2cap_exit(void)
 {
+	bt_6lowpan_cleanup();
 	debugfs_remove(l2cap_debugfs);
 	l2cap_cleanup_sockets();
 }
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 7cc24d263caa..d58f76bcebd1 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -27,6 +27,7 @@
 
 /* Bluetooth L2CAP sockets. */
 
+#include <linux/module.h>
 #include <linux/export.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -35,6 +36,8 @@
 
 #include "smp.h"
 
+bool enable_lecoc;
+
 static struct bt_sock_list l2cap_sk_list = {
 	.lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
 };
@@ -50,6 +53,32 @@ bool l2cap_is_socket(struct socket *sock)
 }
 EXPORT_SYMBOL(l2cap_is_socket);
 
+static int l2cap_validate_bredr_psm(u16 psm)
+{
+	/* PSM must be odd and lsb of upper byte must be 0 */
+	if ((psm & 0x0101) != 0x0001)
+		return -EINVAL;
+
+	/* Restrict usage of well-known PSMs */
+	if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE))
+		return -EACCES;
+
+	return 0;
+}
+
+static int l2cap_validate_le_psm(u16 psm)
+{
+	/* Valid LE_PSM ranges are defined only until 0x00ff */
+	if (psm > 0x00ff)
+		return -EINVAL;
+
+	/* Restrict fixed, SIG assigned PSM values to CAP_NET_BIND_SERVICE */
+	if (psm <= 0x007f && !capable(CAP_NET_BIND_SERVICE))
+		return -EACCES;
+
+	return 0;
+}
+
 static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 {
 	struct sock *sk = sock->sk;
@@ -73,11 +102,11 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 		return -EINVAL;
 
 	if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
-		/* Connection oriented channels are not supported on LE */
-		if (la.l2_psm)
+		if (!enable_lecoc && la.l2_psm)
 			return -EINVAL;
 		/* We only allow ATT user space socket */
-		if (la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
+		if (la.l2_cid &&
+		    la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
 			return -EINVAL;
 	}
 
@@ -91,17 +120,13 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 	if (la.l2_psm) {
 		__u16 psm = __le16_to_cpu(la.l2_psm);
 
-		/* PSM must be odd and lsb of upper byte must be 0 */
-		if ((psm & 0x0101) != 0x0001) {
-			err = -EINVAL;
-			goto done;
-		}
+		if (la.l2_bdaddr_type == BDADDR_BREDR)
+			err = l2cap_validate_bredr_psm(psm);
+		else
+			err = l2cap_validate_le_psm(psm);
 
-		/* Restrict usage of well-known PSMs */
-		if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) {
-			err = -EACCES;
+		if (err)
 			goto done;
-		}
 	}
 
 	if (la.l2_cid)
@@ -122,11 +147,17 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 		    __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM)
 			chan->sec_level = BT_SECURITY_SDP;
 		break;
+	case L2CAP_CHAN_RAW:
+		chan->sec_level = BT_SECURITY_SDP;
+		break;
 	}
 
 	bacpy(&chan->src, &la.l2_bdaddr);
 	chan->src_type = la.l2_bdaddr_type;
 
+	if (chan->psm && bdaddr_type_is_le(chan->src_type))
+		chan->mode = L2CAP_MODE_LE_FLOWCTL;
+
 	chan->state = BT_BOUND;
 	sk->sk_state = BT_BOUND;
 
@@ -189,14 +220,17 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
 		return -EINVAL;
 
 	if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
-		/* Connection oriented channels are not supported on LE */
-		if (la.l2_psm)
+		if (!enable_lecoc && la.l2_psm)
 			return -EINVAL;
 		/* We only allow ATT user space socket */
-		if (la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
+		if (la.l2_cid &&
+		    la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
 			return -EINVAL;
 	}
 
+	if (chan->psm && bdaddr_type_is_le(chan->src_type))
+		chan->mode = L2CAP_MODE_LE_FLOWCTL;
+
 	err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
 				 &la.l2_bdaddr, la.l2_bdaddr_type);
 	if (err)
@@ -234,6 +268,7 @@ static int l2cap_sock_listen(struct socket *sock, int backlog)
 
 	switch (chan->mode) {
 	case L2CAP_MODE_BASIC:
+	case L2CAP_MODE_LE_FLOWCTL:
 		break;
 	case L2CAP_MODE_ERTM:
 	case L2CAP_MODE_STREAMING:
@@ -360,6 +395,16 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname,
 
 	switch (optname) {
 	case L2CAP_OPTIONS:
+		/* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since
+		 * legacy ATT code depends on getsockopt for
+		 * L2CAP_OPTIONS we need to let this pass.
+		 */
+		if (bdaddr_type_is_le(chan->src_type) &&
+		    chan->scid != L2CAP_CID_ATT) {
+			err = -EINVAL;
+			break;
+		}
+
 		memset(&opts, 0, sizeof(opts));
 		opts.imtu     = chan->imtu;
 		opts.omtu     = chan->omtu;
@@ -514,6 +559,41 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
 			err = -EFAULT;
 		break;
 
+	case BT_SNDMTU:
+		if (!enable_lecoc) {
+			err = -EPROTONOSUPPORT;
+			break;
+		}
+
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (sk->sk_state != BT_CONNECTED) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		if (put_user(chan->omtu, (u16 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	case BT_RCVMTU:
+		if (!enable_lecoc) {
+			err = -EPROTONOSUPPORT;
+			break;
+		}
+
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (put_user(chan->imtu, (u16 __user *) optval))
+			err = -EFAULT;
+		break;
+
 	default:
 		err = -ENOPROTOOPT;
 		break;
@@ -554,6 +634,11 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
 
 	switch (optname) {
 	case L2CAP_OPTIONS:
+		if (bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
 		if (sk->sk_state == BT_CONNECTED) {
 			err = -EINVAL;
 			break;
@@ -585,6 +670,8 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
 
 		chan->mode = opts.mode;
 		switch (chan->mode) {
+		case L2CAP_MODE_LE_FLOWCTL:
+			break;
 		case L2CAP_MODE_BASIC:
 			clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
 			break;
@@ -807,6 +894,47 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
 
 		break;
 
+	case BT_SNDMTU:
+		if (!enable_lecoc) {
+			err = -EPROTONOSUPPORT;
+			break;
+		}
+
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		/* Setting is not supported as it's the remote side that
+		 * decides this.
+		 */
+		err = -EPERM;
+		break;
+
+	case BT_RCVMTU:
+		if (!enable_lecoc) {
+			err = -EPROTONOSUPPORT;
+			break;
+		}
+
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (sk->sk_state == BT_CONNECTED) {
+			err = -EISCONN;
+			break;
+		}
+
+		if (get_user(opt, (u32 __user *) optval)) {
+			err = -EFAULT;
+			break;
+		}
+
+		chan->imtu = opt;
+		break;
+
 	default:
 		err = -ENOPROTOOPT;
 		break;
@@ -859,10 +987,16 @@ static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 
 	if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP,
 						    &bt_sk(sk)->flags)) {
-		sk->sk_state = BT_CONFIG;
-		pi->chan->state = BT_CONFIG;
+		if (bdaddr_type_is_le(pi->chan->src_type)) {
+			sk->sk_state = BT_CONNECTED;
+			pi->chan->state = BT_CONNECTED;
+			__l2cap_le_connect_rsp_defer(pi->chan);
+		} else {
+			sk->sk_state = BT_CONFIG;
+			pi->chan->state = BT_CONFIG;
+			__l2cap_connect_rsp_defer(pi->chan);
+		}
 
-		__l2cap_connect_rsp_defer(pi->chan);
 		err = 0;
 		goto done;
 	}
@@ -1236,6 +1370,14 @@ static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan)
 	return sk->sk_sndtimeo;
 }
 
+static void l2cap_sock_suspend_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
+	sk->sk_state_change(sk);
+}
+
 static struct l2cap_ops l2cap_chan_ops = {
 	.name		= "L2CAP Socket Interface",
 	.new_connection	= l2cap_sock_new_connection_cb,
@@ -1246,6 +1388,7 @@ static struct l2cap_ops l2cap_chan_ops = {
 	.ready		= l2cap_sock_ready_cb,
 	.defer		= l2cap_sock_defer_cb,
 	.resume		= l2cap_sock_resume_cb,
+	.suspend	= l2cap_sock_suspend_cb,
 	.set_shutdown	= l2cap_sock_set_shutdown_cb,
 	.get_sndtimeo	= l2cap_sock_get_sndtimeo_cb,
 	.alloc_skb	= l2cap_sock_alloc_skb_cb,
@@ -1270,7 +1413,7 @@ static void l2cap_sock_destruct(struct sock *sk)
 static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name,
 			       int *msg_namelen)
 {
-	struct sockaddr_l2 *la = (struct sockaddr_l2 *) msg_name;
+	DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name);
 
 	memset(la, 0, sizeof(struct sockaddr_l2));
 	la->l2_family = AF_BLUETOOTH;
@@ -1303,6 +1446,8 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent)
 		chan->tx_win_max = pchan->tx_win_max;
 		chan->sec_level = pchan->sec_level;
 		chan->flags = pchan->flags;
+		chan->tx_credits = pchan->tx_credits;
+		chan->rx_credits = pchan->rx_credits;
 
 		security_sk_clone(parent, sk);
 	} else {
@@ -1469,3 +1614,6 @@ void l2cap_cleanup_sockets(void)
 	bt_sock_unregister(BTPROTO_L2CAP);
 	proto_unregister(&l2cap_proto);
 }
+
+module_param(enable_lecoc, bool, 0644);
+MODULE_PARM_DESC(enable_lecoc, "Enable support for LE CoC");
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 074d83690a41..a03ca3ca91bf 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1264,7 +1264,7 @@ static int set_discoverable(struct sock *sk, struct hci_dev *hdev, void *data,
 
 		if (cp->val == 0x02) {
 			/* Limited discoverable mode */
-			hci_cp.num_iac = 2;
+			hci_cp.num_iac = min_t(u8, hdev->num_iac, 2);
 			hci_cp.iac_lap[0] = 0x00;	/* LIAC */
 			hci_cp.iac_lap[1] = 0x8b;
 			hci_cp.iac_lap[2] = 0x9e;
@@ -4595,6 +4595,9 @@ void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
 	struct mgmt_ev_device_disconnected ev;
 	struct sock *sk = NULL;
 
+	if (link_type != ACL_LINK && link_type != LE_LINK)
+		return;
+
 	mgmt_pending_foreach(MGMT_OP_DISCONNECT, hdev, disconnect_rsp, &sk);
 
 	bacpy(&ev.addr.bdaddr, bdaddr);
@@ -4613,6 +4616,8 @@ void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
 			    u8 link_type, u8 addr_type, u8 status)
 {
+	u8 bdaddr_type = link_to_bdaddr(link_type, addr_type);
+	struct mgmt_cp_disconnect *cp;
 	struct mgmt_rp_disconnect rp;
 	struct pending_cmd *cmd;
 
@@ -4623,8 +4628,16 @@ void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
 	if (!cmd)
 		return;
 
+	cp = cmd->param;
+
+	if (bacmp(bdaddr, &cp->addr.bdaddr))
+		return;
+
+	if (cp->addr.type != bdaddr_type)
+		return;
+
 	bacpy(&rp.addr.bdaddr, bdaddr);
-	rp.addr.type = link_to_bdaddr(link_type, addr_type);
+	rp.addr.type = bdaddr_type;
 
 	cmd_complete(cmd->sk, cmd->index, MGMT_OP_DISCONNECT,
 		     mgmt_status(status), &rp, sizeof(rp));
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 84fcf9fff3ea..f9c0980abeea 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -58,6 +58,7 @@ struct rfcomm_dev {
 	uint			modem_status;
 
 	struct rfcomm_dlc	*dlc;
+	wait_queue_head_t       conn_wait;
 
 	struct device		*tty_dev;
 
@@ -103,20 +104,60 @@ static void rfcomm_dev_destruct(struct tty_port *port)
 	module_put(THIS_MODULE);
 }
 
-/* device-specific initialization: open the dlc */
-static int rfcomm_dev_activate(struct tty_port *port, struct tty_struct *tty)
+static struct device *rfcomm_get_device(struct rfcomm_dev *dev)
 {
-	struct rfcomm_dev *dev = container_of(port, struct rfcomm_dev, port);
+	struct hci_dev *hdev;
+	struct hci_conn *conn;
 
-	return rfcomm_dlc_open(dev->dlc, &dev->src, &dev->dst, dev->channel);
+	hdev = hci_get_route(&dev->dst, &dev->src);
+	if (!hdev)
+		return NULL;
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &dev->dst);
+
+	hci_dev_put(hdev);
+
+	return conn ? &conn->dev : NULL;
 }
 
-/* we block the open until the dlc->state becomes BT_CONNECTED */
-static int rfcomm_dev_carrier_raised(struct tty_port *port)
+/* device-specific initialization: open the dlc */
+static int rfcomm_dev_activate(struct tty_port *port, struct tty_struct *tty)
 {
 	struct rfcomm_dev *dev = container_of(port, struct rfcomm_dev, port);
+	DEFINE_WAIT(wait);
+	int err;
+
+	err = rfcomm_dlc_open(dev->dlc, &dev->src, &dev->dst, dev->channel);
+	if (err)
+		return err;
+
+	while (1) {
+		prepare_to_wait(&dev->conn_wait, &wait, TASK_INTERRUPTIBLE);
+
+		if (dev->dlc->state == BT_CLOSED) {
+			err = -dev->err;
+			break;
+		}
+
+		if (dev->dlc->state == BT_CONNECTED)
+			break;
+
+		if (signal_pending(current)) {
+			err = -ERESTARTSYS;
+			break;
+		}
+
+		tty_unlock(tty);
+		schedule();
+		tty_lock(tty);
+	}
+	finish_wait(&dev->conn_wait, &wait);
+
+	if (!err)
+		device_move(dev->tty_dev, rfcomm_get_device(dev),
+			    DPM_ORDER_DEV_AFTER_PARENT);
 
-	return (dev->dlc->state == BT_CONNECTED);
+	return err;
 }
 
 /* device-specific cleanup: close the dlc */
@@ -135,7 +176,6 @@ static const struct tty_port_operations rfcomm_port_ops = {
 	.destruct = rfcomm_dev_destruct,
 	.activate = rfcomm_dev_activate,
 	.shutdown = rfcomm_dev_shutdown,
-	.carrier_raised = rfcomm_dev_carrier_raised,
 };
 
 static struct rfcomm_dev *__rfcomm_dev_get(int id)
@@ -169,22 +209,6 @@ static struct rfcomm_dev *rfcomm_dev_get(int id)
 	return dev;
 }
 
-static struct device *rfcomm_get_device(struct rfcomm_dev *dev)
-{
-	struct hci_dev *hdev;
-	struct hci_conn *conn;
-
-	hdev = hci_get_route(&dev->dst, &dev->src);
-	if (!hdev)
-		return NULL;
-
-	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &dev->dst);
-
-	hci_dev_put(hdev);
-
-	return conn ? &conn->dev : NULL;
-}
-
 static ssize_t show_address(struct device *tty_dev, struct device_attribute *attr, char *buf)
 {
 	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
@@ -258,6 +282,7 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
 
 	tty_port_init(&dev->port);
 	dev->port.ops = &rfcomm_port_ops;
+	init_waitqueue_head(&dev->conn_wait);
 
 	skb_queue_head_init(&dev->pending);
 
@@ -437,7 +462,8 @@ static int rfcomm_release_dev(void __user *arg)
 		tty_kref_put(tty);
 	}
 
-	if (!test_and_set_bit(RFCOMM_TTY_RELEASED, &dev->flags))
+	if (!test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags) &&
+	    !test_and_set_bit(RFCOMM_TTY_RELEASED, &dev->flags))
 		tty_port_put(&dev->port);
 
 	tty_port_put(&dev->port);
@@ -575,12 +601,9 @@ static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err)
 	BT_DBG("dlc %p dev %p err %d", dlc, dev, err);
 
 	dev->err = err;
-	if (dlc->state == BT_CONNECTED) {
-		device_move(dev->tty_dev, rfcomm_get_device(dev),
-			    DPM_ORDER_DEV_AFTER_PARENT);
+	wake_up_interruptible(&dev->conn_wait);
 
-		wake_up_interruptible(&dev->port.open_wait);
-	} else if (dlc->state == BT_CLOSED)
+	if (dlc->state == BT_CLOSED)
 		tty_port_tty_hangup(&dev->port, false);
 }
 
@@ -670,10 +693,20 @@ static int rfcomm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 
 	/* install the tty_port */
 	err = tty_port_install(&dev->port, driver, tty);
-	if (err)
+	if (err) {
 		rfcomm_tty_cleanup(tty);
+		return err;
+	}
 
-	return err;
+	/* take over the tty_port reference if the port was created with the
+	 * flag RFCOMM_RELEASE_ONHUP. This will force the release of the port
+	 * when the last process closes the tty. The behaviour is expected by
+	 * userspace.
+	 */
+	if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags))
+		tty_port_put(&dev->port);
+
+	return 0;
 }
 
 static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp)
@@ -1010,10 +1043,6 @@ static void rfcomm_tty_hangup(struct tty_struct *tty)
 	BT_DBG("tty %p dev %p", tty, dev);
 
 	tty_port_hangup(&dev->port);
-
-	if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags) &&
-	    !test_and_set_bit(RFCOMM_TTY_RELEASED, &dev->flags))
-		tty_port_put(&dev->port);
 }
 
 static int rfcomm_tty_tiocmget(struct tty_struct *tty)
@@ -1096,7 +1125,7 @@ int __init rfcomm_init_ttys(void)
 	rfcomm_tty_driver->subtype	= SERIAL_TYPE_NORMAL;
 	rfcomm_tty_driver->flags	= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
 	rfcomm_tty_driver->init_termios	= tty_std_termios;
-	rfcomm_tty_driver->init_termios.c_cflag	= B9600 | CS8 | CREAD | HUPCL;
+	rfcomm_tty_driver->init_termios.c_cflag	= B9600 | CS8 | CREAD | HUPCL | CLOCAL;
 	rfcomm_tty_driver->init_termios.c_lflag &= ~ICANON;
 	tty_set_operations(rfcomm_tty_driver, &rfcomm_ops);
 
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 4b07acb8293c..45007362683b 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -53,8 +53,7 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
 {
 	struct blkcipher_desc desc;
 	struct scatterlist sg;
-	int err, iv_len;
-	unsigned char iv[128];
+	int err;
 
 	if (tfm == NULL) {
 		BT_ERR("tfm %p", tfm);
@@ -72,12 +71,6 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
 
 	sg_init_one(&sg, r, 16);
 
-	iv_len = crypto_blkcipher_ivsize(tfm);
-	if (iv_len) {
-		memset(&iv, 0xff, iv_len);
-		crypto_blkcipher_set_iv(tfm, iv, iv_len);
-	}
-
 	err = crypto_blkcipher_encrypt(&desc, &sg, &sg, 16);
 	if (err)
 		BT_ERR("Encrypt data error %d", err);
@@ -143,13 +136,6 @@ static int smp_s1(struct crypto_blkcipher *tfm, u8 k[16], u8 r1[16],
 	return err;
 }
 
-static int smp_rand(u8 *buf)
-{
-	get_random_bytes(buf, 16);
-
-	return 0;
-}
-
 static struct sk_buff *smp_build_cmd(struct l2cap_conn *conn, u8 code,
 				     u16 dlen, void *data)
 {
@@ -257,11 +243,11 @@ static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size)
 	return 0;
 }
 
-static void smp_failure(struct l2cap_conn *conn, u8 reason, u8 send)
+static void smp_failure(struct l2cap_conn *conn, u8 reason)
 {
 	struct hci_conn *hcon = conn->hcon;
 
-	if (send)
+	if (reason)
 		smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason),
 			     &reason);
 
@@ -406,7 +392,7 @@ static void confirm_work(struct work_struct *work)
 	return;
 
 error:
-	smp_failure(conn, reason, 1);
+	smp_failure(conn, reason);
 }
 
 static void random_work(struct work_struct *work)
@@ -490,7 +476,7 @@ static void random_work(struct work_struct *work)
 	return;
 
 error:
-	smp_failure(conn, reason, 1);
+	smp_failure(conn, reason);
 }
 
 static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
@@ -555,10 +541,10 @@ int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
 		break;
 	case MGMT_OP_USER_PASSKEY_NEG_REPLY:
 	case MGMT_OP_USER_CONFIRM_NEG_REPLY:
-		smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED, 1);
+		smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED);
 		return 0;
 	default:
-		smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED, 1);
+		smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED);
 		return -EOPNOTSUPP;
 	}
 
@@ -606,9 +592,7 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
 	if (check_enc_key_size(conn, key_size))
 		return SMP_ENC_KEY_SIZE;
 
-	ret = smp_rand(smp->prnd);
-	if (ret)
-		return SMP_UNSPECIFIED;
+	get_random_bytes(smp->prnd, sizeof(smp->prnd));
 
 	smp->prsp[0] = SMP_CMD_PAIRING_RSP;
 	memcpy(&smp->prsp[1], &rsp, sizeof(rsp));
@@ -644,9 +628,7 @@ static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
 	if (check_enc_key_size(conn, key_size))
 		return SMP_ENC_KEY_SIZE;
 
-	ret = smp_rand(smp->prnd);
-	if (ret)
-		return SMP_UNSPECIFIED;
+	get_random_bytes(smp->prnd, sizeof(smp->prnd));
 
 	smp->prsp[0] = SMP_CMD_PAIRING_RSP;
 	memcpy(&smp->prsp[1], rsp, sizeof(*rsp));
@@ -768,6 +750,17 @@ static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
 	return 0;
 }
 
+bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level)
+{
+	if (sec_level == BT_SECURITY_LOW)
+		return true;
+
+	if (hcon->sec_level >= sec_level)
+		return true;
+
+	return false;
+}
+
 int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
 {
 	struct l2cap_conn *conn = hcon->l2cap_data;
@@ -779,10 +772,7 @@ int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
 	if (!test_bit(HCI_LE_ENABLED, &hcon->hdev->dev_flags))
 		return 1;
 
-	if (sec_level == BT_SECURITY_LOW)
-		return 1;
-
-	if (hcon->sec_level >= sec_level)
+	if (smp_sufficient_security(hcon, sec_level))
 		return 1;
 
 	if (hcon->link_mode & HCI_LM_MASTER)
@@ -895,7 +885,7 @@ int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
 		break;
 
 	case SMP_CMD_PAIRING_FAIL:
-		smp_failure(conn, skb->data[0], 0);
+		smp_failure(conn, 0);
 		reason = 0;
 		err = -EPERM;
 		break;
@@ -941,7 +931,7 @@ int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
 
 done:
 	if (reason)
-		smp_failure(conn, reason, 1);
+		smp_failure(conn, reason);
 
 	kfree_skb(skb);
 	return err;
diff --git a/net/bluetooth/smp.h b/net/bluetooth/smp.h
index f8ba07f3e5fa..a700bcb490d7 100644
--- a/net/bluetooth/smp.h
+++ b/net/bluetooth/smp.h
@@ -136,6 +136,7 @@ struct smp_chan {
 };
 
 /* SMP Commands */
+bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level);
 int smp_conn_security(struct hci_conn *hcon, __u8 sec_level);
 int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb);
 int smp_distribute_keys(struct l2cap_conn *conn, __u8 force);