[deliverable/linux.git] / net / mac802154 / ieee802154_dev.c

/*
 * Copyright (C) 2007-2012 Siemens AG
 *
 * Written by:
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 *
 * Based on the code from 'linux-zigbee.sourceforge.net' project.
 *
 * 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.
 *
 * 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.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>

#include <net/netlink.h>
#include <linux/nl802154.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/route.h>
#include <net/wpan-phy.h>

#include "mac802154.h"

int mac802154_slave_open(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct mac802154_sub_if_data *subif;
	struct mac802154_priv *ipriv = priv->hw;
	int res = 0;

	ASSERT_RTNL();

	if (priv->type == IEEE802154_DEV_WPAN) {
		mutex_lock(&priv->hw->slaves_mtx);
		list_for_each_entry(subif, &priv->hw->slaves, list) {
			if (subif != priv && subif->type == priv->type &&
			    subif->running) {
				mutex_unlock(&priv->hw->slaves_mtx);
				return -EBUSY;
			}
		}
		mutex_unlock(&priv->hw->slaves_mtx);
	}

	mutex_lock(&priv->hw->slaves_mtx);
	priv->running = true;
	mutex_unlock(&priv->hw->slaves_mtx);

	if (ipriv->open_count++ == 0) {
		res = ipriv->ops->start(&ipriv->hw);
		WARN_ON(res);
		if (res)
			goto err;
	}

	if (ipriv->ops->ieee_addr) {
		__le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);

		res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
		WARN_ON(res);
		if (res)
			goto err;
		mac802154_dev_set_ieee_addr(dev);
	}

	netif_start_queue(dev);
	return 0;
err:
	priv->hw->open_count--;

	return res;
}

int mac802154_slave_close(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct mac802154_priv *ipriv = priv->hw;

	ASSERT_RTNL();

	netif_stop_queue(dev);

	mutex_lock(&priv->hw->slaves_mtx);
	priv->running = false;
	mutex_unlock(&priv->hw->slaves_mtx);

	if (!--ipriv->open_count)
		ipriv->ops->stop(&ipriv->hw);

	return 0;
}

static int
mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
{
	struct mac802154_sub_if_data *priv;
	struct mac802154_priv *ipriv;
	int err;

	ipriv = wpan_phy_priv(phy);

	priv = netdev_priv(dev);
	priv->dev = dev;
	priv->hw = ipriv;

	dev->needed_headroom = ipriv->hw.extra_tx_headroom;

	SET_NETDEV_DEV(dev, &ipriv->phy->dev);

	mutex_lock(&ipriv->slaves_mtx);
	if (!ipriv->running) {
		mutex_unlock(&ipriv->slaves_mtx);
		return -ENODEV;
	}
	mutex_unlock(&ipriv->slaves_mtx);

	err = register_netdev(dev);
	if (err < 0)
		return err;

	rtnl_lock();
	mutex_lock(&ipriv->slaves_mtx);
	list_add_tail_rcu(&priv->list, &ipriv->slaves);
	mutex_unlock(&ipriv->slaves_mtx);
	rtnl_unlock();

	return 0;
}

static void
mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
{
	struct mac802154_sub_if_data *sdata;

	ASSERT_RTNL();

	sdata = netdev_priv(dev);

	BUG_ON(sdata->hw->phy != phy);

	mutex_lock(&sdata->hw->slaves_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->hw->slaves_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

static struct net_device *
mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
{
	struct net_device *dev;
	int err = -ENOMEM;

	switch (type) {
	case IEEE802154_DEV_MONITOR:
		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
				   name, mac802154_monitor_setup);
		break;
	case IEEE802154_DEV_WPAN:
		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
				   name, mac802154_wpan_setup);
		break;
	default:
		dev = NULL;
		err = -EINVAL;
		break;
	}
	if (!dev)
		goto err;

	err = mac802154_netdev_register(phy, dev);
	if (err)
		goto err_free;

	dev_hold(dev); /* we return an incremented device refcount */
	return dev;

err_free:
	free_netdev(dev);
err:
	return ERR_PTR(err);
}

static int mac802154_set_txpower(struct wpan_phy *phy, int db)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_txpower(&priv->hw, db);
}

static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_lbt(&priv->hw, on);
}

static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_cca_mode(&priv->hw, mode);
}

static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_cca_ed_level(&priv->hw, level);
}

static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
				     u8 max_be, u8 retries)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
}

static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_frame_retries(&priv->hw, retries);
}

struct ieee802154_dev *
ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
{
	struct wpan_phy *phy;
	struct mac802154_priv *priv;
	size_t priv_size;

	if (!ops || !ops->xmit || !ops->ed || !ops->start ||
	    !ops->stop || !ops->set_channel) {
		pr_err("undefined IEEE802.15.4 device operations\n");
		return NULL;
	}

	/* Ensure 32-byte alignment of our private data and hw private data.
	 * We use the wpan_phy priv data for both our mac802154_priv and for
	 * the driver's private data
	 *
	 * in memory it'll be like this:
	 *
	 * +-----------------------+
	 * | struct wpan_phy       |
	 * +-----------------------+
	 * | struct mac802154_priv |
	 * +-----------------------+
	 * | driver's private data |
	 * +-----------------------+
	 *
	 * Due to ieee802154 layer isn't aware of driver and MAC structures,
	 * so lets allign them here.
	 */

	priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;

	phy = wpan_phy_alloc(priv_size);
	if (!phy) {
		pr_err("failure to allocate master IEEE802.15.4 device\n");
		return NULL;
	}

	priv = wpan_phy_priv(phy);
	priv->phy = phy;
	priv->hw.phy = priv->phy;
	priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
	priv->ops = ops;

	INIT_LIST_HEAD(&priv->slaves);
	mutex_init(&priv->slaves_mtx);

	return &priv->hw;
}
EXPORT_SYMBOL(ieee802154_alloc_device);

void ieee802154_free_device(struct ieee802154_dev *hw)
{
	struct mac802154_priv *priv = mac802154_to_priv(hw);

	BUG_ON(!list_empty(&priv->slaves));

	mutex_destroy(&priv->slaves_mtx);

	wpan_phy_free(priv->phy);
}
EXPORT_SYMBOL(ieee802154_free_device);

int ieee802154_register_device(struct ieee802154_dev *dev)
{
	struct mac802154_priv *priv = mac802154_to_priv(dev);
	int rc = -ENOMEM;

	priv->dev_workqueue =
		create_singlethread_workqueue(wpan_phy_name(priv->phy));
	if (!priv->dev_workqueue)
		goto out;

	wpan_phy_set_dev(priv->phy, priv->hw.parent);

	priv->phy->add_iface = mac802154_add_iface;
	priv->phy->del_iface = mac802154_del_iface;
	if (priv->ops->set_txpower)
		priv->phy->set_txpower = mac802154_set_txpower;
	if (priv->ops->set_lbt)
		priv->phy->set_lbt = mac802154_set_lbt;
	if (priv->ops->set_cca_mode)
		priv->phy->set_cca_mode = mac802154_set_cca_mode;
	if (priv->ops->set_cca_ed_level)
		priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
	if (priv->ops->set_csma_params)
		priv->phy->set_csma_params = mac802154_set_csma_params;
	if (priv->ops->set_frame_retries)
		priv->phy->set_frame_retries = mac802154_set_frame_retries;

	rc = wpan_phy_register(priv->phy);
	if (rc < 0)
		goto out_wq;

	rtnl_lock();

	mutex_lock(&priv->slaves_mtx);
	priv->running = MAC802154_DEVICE_RUN;
	mutex_unlock(&priv->slaves_mtx);

	rtnl_unlock();

	return 0;

out_wq:
	destroy_workqueue(priv->dev_workqueue);
out:
	return rc;
}
EXPORT_SYMBOL(ieee802154_register_device);

void ieee802154_unregister_device(struct ieee802154_dev *dev)
{
	struct mac802154_priv *priv = mac802154_to_priv(dev);
	struct mac802154_sub_if_data *sdata, *next;

	flush_workqueue(priv->dev_workqueue);
	destroy_workqueue(priv->dev_workqueue);

	rtnl_lock();

	mutex_lock(&priv->slaves_mtx);
	priv->running = MAC802154_DEVICE_STOPPED;
	mutex_unlock(&priv->slaves_mtx);

	list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
		mutex_lock(&sdata->hw->slaves_mtx);
		list_del(&sdata->list);
		mutex_unlock(&sdata->hw->slaves_mtx);

		unregister_netdevice(sdata->dev);
	}

	rtnl_unlock();

	wpan_phy_unregister(priv->phy);
}
EXPORT_SYMBOL(ieee802154_unregister_device);

MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1010f540	1	/*
	2	* Copyright (C) 2007-2012 Siemens AG
	3	*
	4	* Written by:
	5	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	6	*
	7	* Based on the code from 'linux-zigbee.sourceforge.net' project.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2
	11	* as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/netdevice.h>
	26
62610ad2	27	#include <net/netlink.h>
62610ad2	28	#include <linux/nl802154.h>
1010f540	29	#include <net/mac802154.h>
b70ab2e8	30	#include <net/ieee802154_netdev.h>
1010f540	31	#include <net/route.h>
	32	#include <net/wpan-phy.h>
	33
	34	#include "mac802154.h"
	35
62610ad2	36	int mac802154_slave_open(struct net_device *dev)
	37	{
	38	struct mac802154_sub_if_data *priv = netdev_priv(dev);
336908f6	39	struct mac802154_sub_if_data *subif;
62610ad2	40	struct mac802154_priv *ipriv = priv->hw;
	41	int res = 0;
	42
336908f6 PB	43	ASSERT_RTNL();
	44
	45	if (priv->type == IEEE802154_DEV_WPAN) {
	46	mutex_lock(&priv->hw->slaves_mtx);
	47	list_for_each_entry(subif, &priv->hw->slaves, list) {
	48	if (subif != priv && subif->type == priv->type &&
	49	subif->running) {
	50	mutex_unlock(&priv->hw->slaves_mtx);
	51	return -EBUSY;
	52	}
	53	}
	54	mutex_unlock(&priv->hw->slaves_mtx);
	55	}
	56
	57	mutex_lock(&priv->hw->slaves_mtx);
	58	priv->running = true;
	59	mutex_unlock(&priv->hw->slaves_mtx);
	60
62610ad2	61	if (ipriv->open_count++ == 0) {
	62	res = ipriv->ops->start(&ipriv->hw);
	63	WARN_ON(res);
	64	if (res)
	65	goto err;
	66	}
	67
	68	if (ipriv->ops->ieee_addr) {
b70ab2e8 PB	69	__le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);
	70
	71	res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
62610ad2	72	WARN_ON(res);
	73	if (res)
	74	goto err;
	75	mac802154_dev_set_ieee_addr(dev);
	76	}
	77
	78	netif_start_queue(dev);
	79	return 0;
	80	err:
	81	priv->hw->open_count--;
	82
	83	return res;
	84	}
	85
	86	int mac802154_slave_close(struct net_device *dev)
	87	{
	88	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	89	struct mac802154_priv *ipriv = priv->hw;
	90
336908f6 PB	91	ASSERT_RTNL();
336908f6 PB	92
62610ad2	93	netif_stop_queue(dev);
62610ad2	94
336908f6 PB	95	mutex_lock(&priv->hw->slaves_mtx);
	96	priv->running = false;
	97	mutex_unlock(&priv->hw->slaves_mtx);
	98
62610ad2	99	if (!--ipriv->open_count)
	100	ipriv->ops->stop(&ipriv->hw);
	101
	102	return 0;
	103	}
	104
	105	static int
	106	mac802154_netdev_register(struct wpan_phy phy, struct net_device dev)
	107	{
	108	struct mac802154_sub_if_data *priv;
	109	struct mac802154_priv *ipriv;
	110	int err;
	111
	112	ipriv = wpan_phy_priv(phy);
	113
	114	priv = netdev_priv(dev);
	115	priv->dev = dev;
	116	priv->hw = ipriv;
	117
	118	dev->needed_headroom = ipriv->hw.extra_tx_headroom;
	119
	120	SET_NETDEV_DEV(dev, &ipriv->phy->dev);
	121
	122	mutex_lock(&ipriv->slaves_mtx);
	123	if (!ipriv->running) {
	124	mutex_unlock(&ipriv->slaves_mtx);
	125	return -ENODEV;
	126	}
	127	mutex_unlock(&ipriv->slaves_mtx);
	128
	129	err = register_netdev(dev);
	130	if (err < 0)
	131	return err;
	132
	133	rtnl_lock();
	134	mutex_lock(&ipriv->slaves_mtx);
	135	list_add_tail_rcu(&priv->list, &ipriv->slaves);
	136	mutex_unlock(&ipriv->slaves_mtx);
	137	rtnl_unlock();
	138
	139	return 0;
	140	}
	141
	142	static void
	143	mac802154_del_iface(struct wpan_phy phy, struct net_device dev)
	144	{
	145	struct mac802154_sub_if_data *sdata;
4710d806	146
62610ad2	147	ASSERT_RTNL();
	148
	149	sdata = netdev_priv(dev);
	150
	151	BUG_ON(sdata->hw->phy != phy);
	152
	153	mutex_lock(&sdata->hw->slaves_mtx);
	154	list_del_rcu(&sdata->list);
	155	mutex_unlock(&sdata->hw->slaves_mtx);
	156
	157	synchronize_rcu();
	158	unregister_netdevice(sdata->dev);
	159	}
	160
	161	static struct net_device *
	162	mac802154_add_iface(struct wpan_phy phy, const char name, int type)
	163	{
	164	struct net_device *dev;
	165	int err = -ENOMEM;
	166
62610ad2	167	switch (type) {
0606069d	168	case IEEE802154_DEV_MONITOR:
	169	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
	170	name, mac802154_monitor_setup);
	171	break;
32bad7e3	172	case IEEE802154_DEV_WPAN:
	173	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
	174	name, mac802154_wpan_setup);
	175	break;
62610ad2	176	default:
	177	dev = NULL;
	178	err = -EINVAL;
	179	break;
	180	}
	181	if (!dev)
	182	goto err;
	183
	184	err = mac802154_netdev_register(phy, dev);
	185	if (err)
	186	goto err_free;
	187
	188	dev_hold(dev); /* we return an incremented device refcount */
	189	return dev;
	190
	191	err_free:
	192	free_netdev(dev);
	193	err:
	194	return ERR_PTR(err);
	195	}
	196
9b2777d6 PB	197	static int mac802154_set_txpower(struct wpan_phy *phy, int db)
	198	{
	199	struct mac802154_priv *priv = wpan_phy_priv(phy);
	200
9b2777d6 PB	201	return priv->ops->set_txpower(&priv->hw, db);
	202	}
	203
84dda3c6 PB	204	static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
	205	{
	206	struct mac802154_priv *priv = wpan_phy_priv(phy);
	207
84dda3c6 PB	208	return priv->ops->set_lbt(&priv->hw, on);
	209	}
	210
ba08fea5 PB	211	static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
	212	{
	213	struct mac802154_priv *priv = wpan_phy_priv(phy);
	214
ba08fea5 PB	215	return priv->ops->set_cca_mode(&priv->hw, mode);
	216	}
	217
6ca00197 PB	218	static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
	219	{
	220	struct mac802154_priv *priv = wpan_phy_priv(phy);
	221
6ca00197 PB	222	return priv->ops->set_cca_ed_level(&priv->hw, level);
	223	}
	224
4244db1b PB	225	static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
	226	u8 max_be, u8 retries)
	227	{
	228	struct mac802154_priv *priv = wpan_phy_priv(phy);
	229
4244db1b PB	230	return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
	231	}
	232
	233	static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
	234	{
	235	struct mac802154_priv *priv = wpan_phy_priv(phy);
	236
4244db1b PB	237	return priv->ops->set_frame_retries(&priv->hw, retries);
	238	}
	239
1010f540	240	struct ieee802154_dev *
	241	ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
	242	{
	243	struct wpan_phy *phy;
	244	struct mac802154_priv *priv;
	245	size_t priv_size;
	246
	247	if (!ops \|\| !ops->xmit \|\| !ops->ed \|\| !ops->start \|\|
	248	!ops->stop \|\| !ops->set_channel) {
83a1a7ce	249	pr_err("undefined IEEE802.15.4 device operations\n");
1010f540	250	return NULL;
	251	}
	252
	253	/* Ensure 32-byte alignment of our private data and hw private data.
	254	* We use the wpan_phy priv data for both our mac802154_priv and for
	255	* the driver's private data
	256	*
	257	* in memory it'll be like this:
	258	*
	259	* +-----------------------+
	260	* \| struct wpan_phy \|
	261	* +-----------------------+
	262	* \| struct mac802154_priv \|
	263	* +-----------------------+
	264	* \| driver's private data \|
	265	* +-----------------------+
	266	*
	267	* Due to ieee802154 layer isn't aware of driver and MAC structures,
	268	* so lets allign them here.
	269	*/
	270
	271	priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
	272
	273	phy = wpan_phy_alloc(priv_size);
	274	if (!phy) {
83a1a7ce	275	pr_err("failure to allocate master IEEE802.15.4 device\n");
1010f540	276	return NULL;
	277	}
	278
	279	priv = wpan_phy_priv(phy);
4710d806 VB	280	priv->phy = phy;
4710d806 VB	281	priv->hw.phy = priv->phy;
1010f540	282	priv->hw.priv = (char )priv + ALIGN(sizeof(priv), NETDEV_ALIGN);
	283	priv->ops = ops;
	284
	285	INIT_LIST_HEAD(&priv->slaves);
	286	mutex_init(&priv->slaves_mtx);
	287
	288	return &priv->hw;
	289	}
	290	EXPORT_SYMBOL(ieee802154_alloc_device);
	291
	292	void ieee802154_free_device(struct ieee802154_dev *hw)
	293	{
	294	struct mac802154_priv *priv = mac802154_to_priv(hw);
	295
62610ad2	296	BUG_ON(!list_empty(&priv->slaves));
62610ad2	297
1010f540	298	mutex_destroy(&priv->slaves_mtx);
1e9f9545 KK	299
1e9f9545 KK	300	wpan_phy_free(priv->phy);
1010f540	301	}
	302	EXPORT_SYMBOL(ieee802154_free_device);
	303
	304	int ieee802154_register_device(struct ieee802154_dev *dev)
	305	{
	306	struct mac802154_priv *priv = mac802154_to_priv(dev);
	307	int rc = -ENOMEM;
	308
	309	priv->dev_workqueue =
	310	create_singlethread_workqueue(wpan_phy_name(priv->phy));
	311	if (!priv->dev_workqueue)
	312	goto out;
	313
	314	wpan_phy_set_dev(priv->phy, priv->hw.parent);
	315
62610ad2	316	priv->phy->add_iface = mac802154_add_iface;
62610ad2	317	priv->phy->del_iface = mac802154_del_iface;
e462ded6 PB	318	if (priv->ops->set_txpower)
	319	priv->phy->set_txpower = mac802154_set_txpower;
	320	if (priv->ops->set_lbt)
	321	priv->phy->set_lbt = mac802154_set_lbt;
	322	if (priv->ops->set_cca_mode)
	323	priv->phy->set_cca_mode = mac802154_set_cca_mode;
	324	if (priv->ops->set_cca_ed_level)
	325	priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
	326	if (priv->ops->set_csma_params)
	327	priv->phy->set_csma_params = mac802154_set_csma_params;
	328	if (priv->ops->set_frame_retries)
	329	priv->phy->set_frame_retries = mac802154_set_frame_retries;
62610ad2	330
1010f540	331	rc = wpan_phy_register(priv->phy);
	332	if (rc < 0)
	333	goto out_wq;
	334
	335	rtnl_lock();
	336
	337	mutex_lock(&priv->slaves_mtx);
	338	priv->running = MAC802154_DEVICE_RUN;
	339	mutex_unlock(&priv->slaves_mtx);
	340
	341	rtnl_unlock();
	342
	343	return 0;
	344
	345	out_wq:
	346	destroy_workqueue(priv->dev_workqueue);
	347	out:
	348	return rc;
	349	}
	350	EXPORT_SYMBOL(ieee802154_register_device);
	351
	352	void ieee802154_unregister_device(struct ieee802154_dev *dev)
	353	{
	354	struct mac802154_priv *priv = mac802154_to_priv(dev);
62610ad2	355	struct mac802154_sub_if_data sdata, next;
1010f540	356
	357	flush_workqueue(priv->dev_workqueue);
	358	destroy_workqueue(priv->dev_workqueue);
	359
	360	rtnl_lock();
	361
	362	mutex_lock(&priv->slaves_mtx);
	363	priv->running = MAC802154_DEVICE_STOPPED;
	364	mutex_unlock(&priv->slaves_mtx);
	365
62610ad2	366	list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
	367	mutex_lock(&sdata->hw->slaves_mtx);
	368	list_del(&sdata->list);
	369	mutex_unlock(&sdata->hw->slaves_mtx);
	370
	371	unregister_netdevice(sdata->dev);
	372	}
	373
1010f540	374	rtnl_unlock();
	375
	376	wpan_phy_unregister(priv->phy);
	377	}
	378	EXPORT_SYMBOL(ieee802154_unregister_device);
	379
	380	MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
	381	MODULE_LICENSE("GPL v2");