Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6

19 files changed, 855 insertions, 136 deletions

diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
index 7ca1f46a471..250f954f021 100644
--- a/net/bluetooth/Makefile
+++ b/net/bluetooth/Makefile
@@ -10,4 +10,4 @@ obj-$(CONFIG_BT_BNEP)	+= bnep/
 obj-$(CONFIG_BT_CMTP)	+= cmtp/
 obj-$(CONFIG_BT_HIDP)	+= hidp/
 
-bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o hci_sock.o hci_sysfs.o lib.o
+bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o hci_sock.o hci_sysfs.o lib.o
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 51c61f75a79..8b602d881fd 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -91,9 +91,16 @@ static void hci_notify(struct hci_dev *hdev, int event)
 
 /* ---- HCI requests ---- */
 
-void hci_req_complete(struct hci_dev *hdev, int result)
+void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
 {
-	BT_DBG("%s result 0x%2.2x", hdev->name, result);
+	BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
+
+	/* If the request has set req_last_cmd (typical for multi-HCI
+	 * command requests) check if the completed command matches
+	 * this, and if not just return. Single HCI command requests
+	 * typically leave req_last_cmd as 0 */
+	if (hdev->req_last_cmd && cmd != hdev->req_last_cmd)
+		return;
 
 	if (hdev->req_status == HCI_REQ_PEND) {
 		hdev->req_result = result;
@@ -149,7 +156,7 @@ static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev,
 		break;
 	}
 
-	hdev->req_status = hdev->req_result = 0;
+	hdev->req_last_cmd = hdev->req_status = hdev->req_result = 0;
 
 	BT_DBG("%s end: err %d", hdev->name, err);
 
@@ -252,6 +259,8 @@ static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
 	/* Connection accept timeout ~20 secs */
 	param = cpu_to_le16(0x7d00);
 	hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
+
+	hdev->req_last_cmd = HCI_OP_WRITE_CA_TIMEOUT;
 }
 
 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
@@ -960,6 +969,7 @@ int hci_register_dev(struct hci_dev *hdev)
 		}
 	}
 
+	mgmt_index_added(hdev->id);
 	hci_notify(hdev, HCI_DEV_REG);
 
 	return id;
@@ -989,6 +999,7 @@ int hci_unregister_dev(struct hci_dev *hdev)
 	for (i = 0; i < NUM_REASSEMBLY; i++)
 		kfree_skb(hdev->reassembly[i]);
 
+	mgmt_index_removed(hdev->id);
 	hci_notify(hdev, HCI_DEV_UNREG);
 
 	if (hdev->rfkill) {
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 8923b36a67a..38100170d38 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -58,7 +58,7 @@ static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb)
 
 	clear_bit(HCI_INQUIRY, &hdev->flags);
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_INQUIRY_CANCEL, status);
 
 	hci_conn_check_pending(hdev);
 }
@@ -174,7 +174,7 @@ static void hci_cc_write_def_link_policy(struct hci_dev *hdev, struct sk_buff *s
 	if (!status)
 		hdev->link_policy = get_unaligned_le16(sent);
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, status);
 }
 
 static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
@@ -183,7 +183,7 @@ static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 
 	BT_DBG("%s status 0x%x", hdev->name, status);
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_RESET, status);
 }
 
 static void hci_cc_write_local_name(struct hci_dev *hdev, struct sk_buff *skb)
@@ -235,7 +235,7 @@ static void hci_cc_write_auth_enable(struct hci_dev *hdev, struct sk_buff *skb)
 			clear_bit(HCI_AUTH, &hdev->flags);
 	}
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_WRITE_AUTH_ENABLE, status);
 }
 
 static void hci_cc_write_encrypt_mode(struct hci_dev *hdev, struct sk_buff *skb)
@@ -258,7 +258,7 @@ static void hci_cc_write_encrypt_mode(struct hci_dev *hdev, struct sk_buff *skb)
 			clear_bit(HCI_ENCRYPT, &hdev->flags);
 	}
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_WRITE_ENCRYPT_MODE, status);
 }
 
 static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
@@ -285,7 +285,7 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
 			set_bit(HCI_PSCAN, &hdev->flags);
 	}
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_WRITE_SCAN_ENABLE, status);
 }
 
 static void hci_cc_read_class_of_dev(struct hci_dev *hdev, struct sk_buff *skb)
@@ -383,7 +383,7 @@ static void hci_cc_host_buffer_size(struct hci_dev *hdev, struct sk_buff *skb)
 
 	BT_DBG("%s status 0x%x", hdev->name, status);
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_HOST_BUFFER_SIZE, status);
 }
 
 static void hci_cc_read_ssp_mode(struct hci_dev *hdev, struct sk_buff *skb)
@@ -536,7 +536,16 @@ static void hci_cc_read_bd_addr(struct hci_dev *hdev, struct sk_buff *skb)
 	if (!rp->status)
 		bacpy(&hdev->bdaddr, &rp->bdaddr);
 
-	hci_req_complete(hdev, rp->status);
+	hci_req_complete(hdev, HCI_OP_READ_BD_ADDR, rp->status);
+}
+
+static void hci_cc_write_ca_timeout(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%x", hdev->name, status);
+
+	hci_req_complete(hdev, HCI_OP_WRITE_CA_TIMEOUT, status);
 }
 
 static inline void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
@@ -544,7 +553,7 @@ static inline void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
 	BT_DBG("%s status 0x%x", hdev->name, status);
 
 	if (status) {
-		hci_req_complete(hdev, status);
+		hci_req_complete(hdev, HCI_OP_INQUIRY, status);
 
 		hci_conn_check_pending(hdev);
 	} else
@@ -871,7 +880,7 @@ static inline void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff
 
 	clear_bit(HCI_INQUIRY, &hdev->flags);
 
-	hci_req_complete(hdev, status);
+	hci_req_complete(hdev, HCI_OP_INQUIRY, status);
 
 	hci_conn_check_pending(hdev);
 }
@@ -1379,6 +1388,10 @@ static inline void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *sk
 		hci_cc_read_bd_addr(hdev, skb);
 		break;
 
+	case HCI_OP_WRITE_CA_TIMEOUT:
+		hci_cc_write_ca_timeout(hdev, skb);
+		break;
+
 	default:
 		BT_DBG("%s opcode 0x%x", hdev->name, opcode);
 		break;
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index b3753bad2a5..29827c77f6c 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -49,6 +49,8 @@
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
+static int enable_mgmt;
+
 /* ----- HCI socket interface ----- */
 
 static inline int hci_test_bit(int nr, void *addr)
@@ -102,6 +104,12 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
 		if (skb->sk == sk)
 			continue;
 
+		if (bt_cb(skb)->channel != hci_pi(sk)->channel)
+			continue;
+
+		if (bt_cb(skb)->channel == HCI_CHANNEL_CONTROL)
+			goto clone;
+
 		/* Apply filter */
 		flt = &hci_pi(sk)->filter;
 
@@ -125,12 +133,14 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
 				continue;
 		}
 
+clone:
 		nskb = skb_clone(skb, GFP_ATOMIC);
 		if (!nskb)
 			continue;
 
 		/* Put type byte before the data */
-		memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
+		if (bt_cb(skb)->channel == HCI_CHANNEL_RAW)
+			memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
 
 		if (sock_queue_rcv_skb(sk, nskb))
 			kfree_skb(nskb);
@@ -353,25 +363,38 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long a
 
 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 {
-	struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
+	struct sockaddr_hci haddr;
 	struct sock *sk = sock->sk;
 	struct hci_dev *hdev = NULL;
-	int err = 0;
+	int len, err = 0;
 
 	BT_DBG("sock %p sk %p", sock, sk);
 
-	if (!haddr || haddr->hci_family != AF_BLUETOOTH)
+	if (!addr)
+		return -EINVAL;
+
+	memset(&haddr, 0, sizeof(haddr));
+	len = min_t(unsigned int, sizeof(haddr), addr_len);
+	memcpy(&haddr, addr, len);
+
+	if (haddr.hci_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	if (haddr.hci_channel > HCI_CHANNEL_CONTROL)
+		return -EINVAL;
+
+	if (haddr.hci_channel == HCI_CHANNEL_CONTROL && !enable_mgmt)
 		return -EINVAL;
 
 	lock_sock(sk);
 
-	if (hci_pi(sk)->hdev) {
+	if (sk->sk_state == BT_BOUND || hci_pi(sk)->hdev) {
 		err = -EALREADY;
 		goto done;
 	}
 
-	if (haddr->hci_dev != HCI_DEV_NONE) {
-		hdev = hci_dev_get(haddr->hci_dev);
+	if (haddr.hci_dev != HCI_DEV_NONE) {
+		hdev = hci_dev_get(haddr.hci_dev);
 		if (!hdev) {
 			err = -ENODEV;
 			goto done;
@@ -380,6 +403,7 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_le
 		atomic_inc(&hdev->promisc);
 	}
 
+	hci_pi(sk)->channel = haddr.hci_channel;
 	hci_pi(sk)->hdev = hdev;
 	sk->sk_state = BT_BOUND;
 
@@ -502,6 +526,17 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 
 	lock_sock(sk);
 
+	switch (hci_pi(sk)->channel) {
+	case HCI_CHANNEL_RAW:
+		break;
+	case HCI_CHANNEL_CONTROL:
+		err = mgmt_control(sk, msg, len);
+		goto done;
+	default:
+		err = -EINVAL;
+		goto done;
+	}
+
 	hdev = hci_pi(sk)->hdev;
 	if (!hdev) {
 		err = -EBADFD;
@@ -831,3 +866,6 @@ void __exit hci_sock_cleanup(void)
 
 	proto_unregister(&hci_sk_proto);
 }
+
+module_param(enable_mgmt, bool, 0644);
+MODULE_PARM_DESC(enable_mgmt, "Enable Management interface");
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index c12eccfdfe0..c791fcda7b2 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3124,8 +3124,14 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 	if (!sk)
 		return -ENOENT;
 
-	if (sk->sk_state == BT_DISCONN)
+	if (sk->sk_state != BT_CONFIG) {
+		struct l2cap_cmd_rej rej;
+
+		rej.reason = cpu_to_le16(0x0002);
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ,
+				sizeof(rej), &rej);
 		goto unlock;
+	}
 
 	/* Reject if config buffer is too small. */
 	len = cmd_len - sizeof(*req);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
new file mode 100644
index 00000000000..f827fd90838
--- /dev/null
+++ b/net/bluetooth/mgmt.c
@@ -0,0 +1,308 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2010  Nokia Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI Management interface */
+
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/mgmt.h>
+
+#define MGMT_VERSION	0
+#define MGMT_REVISION	1
+
+static int cmd_status(struct sock *sk, u16 cmd, u8 status)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_status *ev;
+
+	BT_DBG("sock %p", sk);
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
+	hdr->len = cpu_to_le16(sizeof(*ev));
+
+	ev = (void *) skb_put(skb, sizeof(*ev));
+	ev->status = status;
+	put_unaligned_le16(cmd, &ev->opcode);
+
+	if (sock_queue_rcv_skb(sk, skb) < 0)
+		kfree_skb(skb);
+
+	return 0;
+}
+
+static int read_version(struct sock *sk)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_complete *ev;
+	struct mgmt_rp_read_version *rp;
+
+	BT_DBG("sock %p", sk);
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+	hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));
+
+	ev = (void *) skb_put(skb, sizeof(*ev));
+	put_unaligned_le16(MGMT_OP_READ_VERSION, &ev->opcode);
+
+	rp = (void *) skb_put(skb, sizeof(*rp));
+	rp->version = MGMT_VERSION;
+	put_unaligned_le16(MGMT_REVISION, &rp->revision);
+
+	if (sock_queue_rcv_skb(sk, skb) < 0)
+		kfree_skb(skb);
+
+	return 0;
+}
+
+static int read_index_list(struct sock *sk)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_complete *ev;
+	struct mgmt_rp_read_index_list *rp;
+	struct list_head *p;
+	size_t body_len;
+	u16 count;
+	int i;
+
+	BT_DBG("sock %p", sk);
+
+	read_lock(&hci_dev_list_lock);
+
+	count = 0;
+	list_for_each(p, &hci_dev_list) {
+		count++;
+	}
+
+	body_len = sizeof(*ev) + sizeof(*rp) + (2 * count);
+	skb = alloc_skb(sizeof(*hdr) + body_len, GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+	hdr->len = cpu_to_le16(body_len);
+
+	ev = (void *) skb_put(skb, sizeof(*ev));
+	put_unaligned_le16(MGMT_OP_READ_INDEX_LIST, &ev->opcode);
+
+	rp = (void *) skb_put(skb, sizeof(*rp) + (2 * count));
+	put_unaligned_le16(count, &rp->num_controllers);
+
+	i = 0;
+	list_for_each(p, &hci_dev_list) {
+		struct hci_dev *d = list_entry(p, struct hci_dev, list);
+		put_unaligned_le16(d->id, &rp->index[i++]);
+		BT_DBG("Added hci%u", d->id);
+	}
+
+	read_unlock(&hci_dev_list_lock);
+
+	if (sock_queue_rcv_skb(sk, skb) < 0)
+		kfree_skb(skb);
+
+	return 0;
+}
+
+static int read_controller_info(struct sock *sk, unsigned char *data, u16 len)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_complete *ev;
+	struct mgmt_rp_read_info *rp;
+	struct mgmt_cp_read_info *cp;
+	struct hci_dev *hdev;
+	u16 dev_id;
+
+	BT_DBG("sock %p", sk);
+
+	if (len != 2)
+		return cmd_status(sk, MGMT_OP_READ_INFO, EINVAL);
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+	hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));
+
+	ev = (void *) skb_put(skb, sizeof(*ev));
+	put_unaligned_le16(MGMT_OP_READ_INFO, &ev->opcode);
+
+	rp = (void *) skb_put(skb, sizeof(*rp));
+
+	cp = (void *) data;
+	dev_id = get_unaligned_le16(&cp->index);
+
+	BT_DBG("request for hci%u", dev_id);
+
+	hdev = hci_dev_get(dev_id);
+	if (!hdev) {
+		kfree_skb(skb);
+		return cmd_status(sk, MGMT_OP_READ_INFO, ENODEV);
+	}
+
+	hci_dev_lock_bh(hdev);
+
+	put_unaligned_le16(hdev->id, &rp->index);
+	rp->type = hdev->dev_type;
+
+	rp->powered = test_bit(HCI_UP, &hdev->flags);
+	rp->discoverable = test_bit(HCI_ISCAN, &hdev->flags);
+	rp->pairable = test_bit(HCI_PSCAN, &hdev->flags);
+
+	if (test_bit(HCI_AUTH, &hdev->flags))
+		rp->sec_mode = 3;
+	else if (hdev->ssp_mode > 0)
+		rp->sec_mode = 4;
+	else
+		rp->sec_mode = 2;
+
+	bacpy(&rp->bdaddr, &hdev->bdaddr);
+	memcpy(rp->features, hdev->features, 8);
+	memcpy(rp->dev_class, hdev->dev_class, 3);
+	put_unaligned_le16(hdev->manufacturer, &rp->manufacturer);
+	rp->hci_ver = hdev->hci_ver;
+	put_unaligned_le16(hdev->hci_rev, &rp->hci_rev);
+
+	hci_dev_unlock_bh(hdev);
+	hci_dev_put(hdev);
+
+	if (sock_queue_rcv_skb(sk, skb) < 0)
+		kfree_skb(skb);
+
+	return 0;
+}
+
+int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
+{
+	unsigned char *buf;
+	struct mgmt_hdr *hdr;
+	u16 opcode, len;
+	int err;
+
+	BT_DBG("got %zu bytes", msglen);
+
+	if (msglen < sizeof(*hdr))
+		return -EINVAL;
+
+	buf = kmalloc(msglen, GFP_ATOMIC);
+	if (!buf)
+		return -ENOMEM;
+
+	if (memcpy_fromiovec(buf, msg->msg_iov, msglen)) {
+		err = -EFAULT;
+		goto done;
+	}
+
+	hdr = (struct mgmt_hdr *) buf;
+	opcode = get_unaligned_le16(&hdr->opcode);
+	len = get_unaligned_le16(&hdr->len);
+
+	if (len != msglen - sizeof(*hdr)) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	switch (opcode) {
+	case MGMT_OP_READ_VERSION:
+		err = read_version(sk);
+		break;
+	case MGMT_OP_READ_INDEX_LIST:
+		err = read_index_list(sk);
+		break;
+	case MGMT_OP_READ_INFO:
+		err = read_controller_info(sk, buf + sizeof(*hdr), len);
+		break;
+	default:
+		BT_DBG("Unknown op %u", opcode);
+		err = cmd_status(sk, opcode, 0x01);
+		break;
+	}
+
+	if (err < 0)
+		goto done;
+
+	err = msglen;
+
+done:
+	kfree(buf);
+	return err;
+}
+
+static int mgmt_event(u16 event, void *data, u16 data_len)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+
+	skb = alloc_skb(sizeof(*hdr) + data_len, GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	bt_cb(skb)->channel = HCI_CHANNEL_CONTROL;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+	hdr->opcode = cpu_to_le16(event);
+	hdr->len = cpu_to_le16(data_len);
+
+	memcpy(skb_put(skb, data_len), data, data_len);
+
+	hci_send_to_sock(NULL, skb);
+	kfree_skb(skb);
+
+	return 0;
+}
+
+int mgmt_index_added(u16 index)
+{
+	struct mgmt_ev_index_added ev;
+
+	put_unaligned_le16(index, &ev.index);
+
+	return mgmt_event(MGMT_EV_INDEX_ADDED, &ev, sizeof(ev));
+}
+
+int mgmt_index_removed(u16 index)
+{
+	struct mgmt_ev_index_added ev;
+
+	put_unaligned_le16(index, &ev.index);
+
+	return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev));
+}
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 5892b030245..4bc8a9250cf 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1593,6 +1593,37 @@ static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
 	return 0;
 }
 
+static int ieee80211_remain_on_channel_hw(struct ieee80211_local *local,
+					  struct net_device *dev,
+					  struct ieee80211_channel *chan,
+					  enum nl80211_channel_type chantype,
+					  unsigned int duration, u64 *cookie)
+{
+	int ret;
+	u32 random_cookie;
+
+	lockdep_assert_held(&local->mtx);
+
+	if (local->hw_roc_cookie)
+		return -EBUSY;
+	/* must be nonzero */
+	random_cookie = random32() | 1;
+
+	*cookie = random_cookie;
+	local->hw_roc_dev = dev;
+	local->hw_roc_cookie = random_cookie;
+	local->hw_roc_channel = chan;
+	local->hw_roc_channel_type = chantype;
+	local->hw_roc_duration = duration;
+	ret = drv_remain_on_channel(local, chan, chantype, duration);
+	if (ret) {
+		local->hw_roc_channel = NULL;
+		local->hw_roc_cookie = 0;
+	}
+
+	return ret;
+}
+
 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
 				       struct net_device *dev,
 				       struct ieee80211_channel *chan,
@@ -1601,16 +1632,63 @@ static int ieee80211_remain_on_channel(struct wiphy *wiphy,
 				       u64 *cookie)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+
+	if (local->ops->remain_on_channel) {
+		int ret;
+
+		mutex_lock(&local->mtx);
+		ret = ieee80211_remain_on_channel_hw(local, dev,
+						     chan, channel_type,
+						     duration, cookie);
+		local->hw_roc_for_tx = false;
+		mutex_unlock(&local->mtx);
+
+		return ret;
+	}
 
 	return ieee80211_wk_remain_on_channel(sdata, chan, channel_type,
 					      duration, cookie);
 }
 
+static int ieee80211_cancel_remain_on_channel_hw(struct ieee80211_local *local,
+						 u64 cookie)
+{
+	int ret;
+
+	lockdep_assert_held(&local->mtx);
+
+	if (local->hw_roc_cookie != cookie)
+		return -ENOENT;
+
+	ret = drv_cancel_remain_on_channel(local);
+	if (ret)
+		return ret;
+
+	local->hw_roc_cookie = 0;
+	local->hw_roc_channel = NULL;
+
+	ieee80211_recalc_idle(local);
+
+	return 0;
+}
+
 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
 					      struct net_device *dev,
 					      u64 cookie)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+
+	if (local->ops->cancel_remain_on_channel) {
+		int ret;
+
+		mutex_lock(&local->mtx);
+		ret = ieee80211_cancel_remain_on_channel_hw(local, cookie);
+		mutex_unlock(&local->mtx);
+
+		return ret;
+	}
 
 	return ieee80211_wk_cancel_remain_on_channel(sdata, cookie);
 }
@@ -1662,6 +1740,12 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct net_device *dev,
 	     channel_type != local->_oper_channel_type))
 		is_offchan = true;
 
+	if (chan == local->hw_roc_channel) {
+		/* TODO: check channel type? */
+		is_offchan = false;
+		flags |= IEEE80211_TX_CTL_TX_OFFCHAN;
+	}
+
 	if (is_offchan && !offchan)
 		return -EBUSY;
 
@@ -1700,6 +1784,49 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct net_device *dev,
 
 	*cookie = (unsigned long) skb;
 
+	if (is_offchan && local->ops->remain_on_channel) {
+		unsigned int duration;
+		int ret;
+
+		mutex_lock(&local->mtx);
+		/*
+		 * If the duration is zero, then the driver
+		 * wouldn't actually do anything. Set it to
+		 * 100 for now.
+		 *
+		 * TODO: cancel the off-channel operation
+		 *       when we get the SKB's TX status and
+		 *       the wait time was zero before.
+		 */
+		duration = 100;
+		if (wait)
+			duration = wait;
+		ret = ieee80211_remain_on_channel_hw(local, dev, chan,
+						     channel_type,
+						     duration, cookie);
+		if (ret) {
+			kfree_skb(skb);
+			mutex_unlock(&local->mtx);
+			return ret;
+		}
+
+		local->hw_roc_for_tx = true;
+		local->hw_roc_duration = wait;
+
+		/*
+		 * queue up frame for transmission after
+		 * ieee80211_ready_on_channel call
+		 */
+
+		/* modify cookie to prevent API mismatches */
+		*cookie ^= 2;
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN;
+		local->hw_roc_skb = skb;
+		mutex_unlock(&local->mtx);
+
+		return 0;
+	}
+
 	/*
 	 * Can transmit right away if the channel was the
 	 * right one and there's no wait involved... If a
@@ -1740,6 +1867,21 @@ static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
 	int ret = -ENOENT;
 
 	mutex_lock(&local->mtx);
+
+	if (local->ops->cancel_remain_on_channel) {
+		cookie ^= 2;
+		ret = ieee80211_cancel_remain_on_channel_hw(local, cookie);
+
+		if (ret == 0) {
+			kfree_skb(local->hw_roc_skb);
+			local->hw_roc_skb = NULL;
+		}
+
+		mutex_unlock(&local->mtx);
+
+		return ret;
+	}
+
 	list_for_each_entry(wk, &local->work_list, list) {
 		if (wk->sdata != sdata)
 			continue;
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index af0c4398cce..98d589960a4 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -465,4 +465,34 @@ static inline int drv_get_antenna(struct ieee80211_local *local,
 	return ret;
 }
 
+static inline int drv_remain_on_channel(struct ieee80211_local *local,
+					struct ieee80211_channel *chan,
+					enum nl80211_channel_type chantype,
+					unsigned int duration)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_remain_on_channel(local, chan, chantype, duration);
+	ret = local->ops->remain_on_channel(&local->hw, chan, chantype,
+					    duration);
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline int drv_cancel_remain_on_channel(struct ieee80211_local *local)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_cancel_remain_on_channel(local);
+	ret = local->ops->cancel_remain_on_channel(&local->hw);
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
 #endif /* __MAC80211_DRIVER_OPS */
diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h
index c2772f23ac9..49c84218b2f 100644
--- a/net/mac80211/driver-trace.h
+++ b/net/mac80211/driver-trace.h
@@ -933,6 +933,50 @@ TRACE_EVENT(drv_get_antenna,
 	)
 );
 
+TRACE_EVENT(drv_remain_on_channel,
+	TP_PROTO(struct ieee80211_local *local, struct ieee80211_channel *chan,
+		 enum nl80211_channel_type chantype, unsigned int duration),
+
+	TP_ARGS(local, chan, chantype, duration),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(int, center_freq)
+		__field(int, channel_type)
+		__field(unsigned int, duration)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->center_freq = chan->center_freq;
+		__entry->channel_type = chantype;
+		__entry->duration = duration;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " freq:%dMHz duration:%dms",
+		LOCAL_PR_ARG, __entry->center_freq, __entry->duration
+	)
+);
+
+TRACE_EVENT(drv_cancel_remain_on_channel,
+	TP_PROTO(struct ieee80211_local *local),
+
+	TP_ARGS(local),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT, LOCAL_PR_ARG
+	)
+);
+
 /*
  * Tracing for API calls that drivers call.
  */
@@ -1170,6 +1214,42 @@ TRACE_EVENT(api_chswitch_done,
 	)
 );
 
+TRACE_EVENT(api_ready_on_channel,
+	TP_PROTO(struct ieee80211_local *local),
+
+	TP_ARGS(local),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT, LOCAL_PR_ARG
+	)
+);
+
+TRACE_EVENT(api_remain_on_channel_expired,
+	TP_PROTO(struct ieee80211_local *local),
+
+	TP_ARGS(local),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT, LOCAL_PR_ARG
+	)
+);
+
 /*
  * Tracing for internal functions
  * (which may also be called in response to driver calls)
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index a05893a238b..c47d7c0e48a 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -168,6 +168,7 @@ typedef unsigned __bitwise__ ieee80211_rx_result;
  * @IEEE80211_RX_FRAGMENTED: fragmented frame
  * @IEEE80211_RX_AMSDU: a-MSDU packet
  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
+ * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
  *
  * These are per-frame flags that are attached to a frame in the
  * @rx_flags field of &struct ieee80211_rx_status.
@@ -178,6 +179,7 @@ enum ieee80211_packet_rx_flags {
 	IEEE80211_RX_FRAGMENTED			= BIT(2),
 	IEEE80211_RX_AMSDU			= BIT(3),
 	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
+	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
 };
 
 /**
@@ -774,6 +776,15 @@ struct ieee80211_local {
 	struct sk_buff_head skb_queue;
 	struct sk_buff_head skb_queue_unreliable;
 
+	/*
+	 * Internal FIFO queue which is shared between multiple rx path
+	 * stages. Its main task is to provide a serialization mechanism,
+	 * so all rx handlers can enjoy having exclusive access to their
+	 * private data structures.
+	 */
+	struct sk_buff_head rx_skb_queue;
+	bool running_rx_handler;	/* protected by rx_skb_queue.lock */
+
 	/* Station data */
 	/*
 	 * The mutex only protects the list and counter,
@@ -940,6 +951,15 @@ struct ieee80211_local {
 	} debugfs;
 #endif
 
+	struct ieee80211_channel *hw_roc_channel;
+	struct net_device *hw_roc_dev;
+	struct sk_buff *hw_roc_skb;
+	struct work_struct hw_roc_start, hw_roc_done;
+	enum nl80211_channel_type hw_roc_channel_type;
+	unsigned int hw_roc_duration;
+	u32 hw_roc_cookie;
+	bool hw_roc_for_tx;