1 files changed, 947 insertions, 189 deletions

diff --git a/net/wireless/core.c b/net/wireless/core.c
index cfc5fc5f9e7..a1c40654dd9 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -1,24 +1,32 @@
 /*
  * This is the linux wireless configuration interface.
  *
- * Copyright 2006, 2007		Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2010		Johannes Berg <johannes@sipsolutions.net>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/if.h>
 #include <linux/module.h>
 #include <linux/err.h>
-#include <linux/mutex.h>
 #include <linux/list.h>
+#include <linux/slab.h>
 #include <linux/nl80211.h>
 #include <linux/debugfs.h>
 #include <linux/notifier.h>
 #include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/sched.h>
 #include <net/genetlink.h>
 #include <net/cfg80211.h>
-#include <net/wireless.h>
 #include "nl80211.h"
 #include "core.h"
 #include "sysfs.h"
+#include "debugfs.h"
+#include "wext-compat.h"
+#include "ethtool.h"
+#include "rdev-ops.h"
 
 /* name for sysfs, %d is appended */
 #define PHY_NAME "phy"
@@ -26,25 +34,32 @@
 MODULE_AUTHOR("Johannes Berg");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("wireless configuration support");
+MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
 
-/* RCU might be appropriate here since we usually
- * only read the list, and that can happen quite
- * often because we need to do it for each command */
-LIST_HEAD(cfg80211_drv_list);
-DEFINE_MUTEX(cfg80211_drv_mutex);
-static int wiphy_counter;
+/* RCU-protected (and RTNL for writers) */
+LIST_HEAD(cfg80211_rdev_list);
+int cfg80211_rdev_list_generation;
 
 /* for debugfs */
 static struct dentry *ieee80211_debugfs_dir;
 
-/* requires cfg80211_drv_mutex to be held! */
-static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy)
+/* for the cleanup, scan and event works */
+struct workqueue_struct *cfg80211_wq;
+
+static bool cfg80211_disable_40mhz_24ghz;
+module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
+MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
+		 "Disable 40MHz support in the 2.4GHz band");
+
+struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
 {
-	struct cfg80211_registered_device *result = NULL, *drv;
+	struct cfg80211_registered_device *result = NULL, *rdev;
 
-	list_for_each_entry(drv, &cfg80211_drv_list, list) {
-		if (drv->idx == wiphy) {
-			result = drv;
+	ASSERT_RTNL();
+
+	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
+		if (rdev->wiphy_idx == wiphy_idx) {
+			result = rdev;
 			break;
 		}
 	}
@@ -52,105 +67,39 @@ static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy)
 	return result;
 }
 
-/* requires cfg80211_drv_mutex to be held! */
-static struct cfg80211_registered_device *
-__cfg80211_drv_from_info(struct genl_info *info)
+int get_wiphy_idx(struct wiphy *wiphy)
 {
-	int ifindex;
-	struct cfg80211_registered_device *bywiphy = NULL, *byifidx = NULL;
-	struct net_device *dev;
-	int err = -EINVAL;
-
-	if (info->attrs[NL80211_ATTR_WIPHY]) {
-		bywiphy = cfg80211_drv_by_wiphy(
-				nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
-		err = -ENODEV;
-	}
-
-	if (info->attrs[NL80211_ATTR_IFINDEX]) {
-		ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
-		dev = dev_get_by_index(&init_net, ifindex);
-		if (dev) {
-			if (dev->ieee80211_ptr)
-				byifidx =
-					wiphy_to_dev(dev->ieee80211_ptr->wiphy);
-			dev_put(dev);
-		}
-		err = -ENODEV;
-	}
-
-	if (bywiphy && byifidx) {
-		if (bywiphy != byifidx)
-			return ERR_PTR(-EINVAL);
-		else
-			return bywiphy; /* == byifidx */
-	}
-	if (bywiphy)
-		return bywiphy;
-
-	if (byifidx)
-		return byifidx;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
-	return ERR_PTR(err);
+	return rdev->wiphy_idx;
 }
 
-struct cfg80211_registered_device *
-cfg80211_get_dev_from_info(struct genl_info *info)
+struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
 {
-	struct cfg80211_registered_device *drv;
-
-	mutex_lock(&cfg80211_drv_mutex);
-	drv = __cfg80211_drv_from_info(info);
-
-	/* if it is not an error we grab the lock on
-	 * it to assure it won't be going away while
-	 * we operate on it */
-	if (!IS_ERR(drv))
-		mutex_lock(&drv->mtx);
-
-	mutex_unlock(&cfg80211_drv_mutex);
-
-	return drv;
-}
+	struct cfg80211_registered_device *rdev;
 
-struct cfg80211_registered_device *
-cfg80211_get_dev_from_ifindex(int ifindex)
-{
-	struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV);
-	struct net_device *dev;
-
-	mutex_lock(&cfg80211_drv_mutex);
-	dev = dev_get_by_index(&init_net, ifindex);
-	if (!dev)
-		goto out;
-	if (dev->ieee80211_ptr) {
-		drv = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
-		mutex_lock(&drv->mtx);
-	} else
-		drv = ERR_PTR(-ENODEV);
-	dev_put(dev);
- out:
-	mutex_unlock(&cfg80211_drv_mutex);
-	return drv;
-}
+	ASSERT_RTNL();
 
-void cfg80211_put_dev(struct cfg80211_registered_device *drv)
-{
-	BUG_ON(IS_ERR(drv));
-	mutex_unlock(&drv->mtx);
+	rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
+	if (!rdev)
+		return NULL;
+	return &rdev->wiphy;
 }
 
 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 			char *newname)
 {
-	int idx, taken = -1, result, digits;
+	struct cfg80211_registered_device *rdev2;
+	int wiphy_idx, taken = -1, result, digits;
+
+	ASSERT_RTNL();
 
 	/* prohibit calling the thing phy%d when %d is not its number */
-	sscanf(newname, PHY_NAME "%d%n", &idx, &taken);
-	if (taken == strlen(newname) && idx != rdev->idx) {
-		/* count number of places needed to print idx */
+	sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
+	if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
+		/* count number of places needed to print wiphy_idx */
 		digits = 1;
-		while (idx /= 10)
+		while (wiphy_idx /= 10)
 			digits++;
 		/*
 		 * deny the name if it is phy<idx> where <idx> is printed
@@ -160,135 +109,648 @@ int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 			return -EINVAL;
 	}
 
-	/* this will check for collisions */
+
+	/* Ignore nop renames */
+	if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
+		return 0;
+
+	/* Ensure another device does not already have this name. */
+	list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
+		if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
+			return -EINVAL;
+
 	result = device_rename(&rdev->wiphy.dev, newname);
 	if (result)
 		return result;
 
-	if (!debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
+	if (rdev->wiphy.debugfsdir &&
+	    !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
 			    rdev->wiphy.debugfsdir,
 			    rdev->wiphy.debugfsdir->d_parent,
 			    newname))
-		printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
-		       newname);
+		pr_err("failed to rename debugfs dir to %s!\n", newname);
 
-	nl80211_notify_dev_rename(rdev);
+	nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
 
 	return 0;
 }
 
-/* exported functions */
+int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
+			  struct net *net)
+{
+	struct wireless_dev *wdev;
+	int err = 0;
+
+	if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
+		return -EOPNOTSUPP;
+
+	list_for_each_entry(wdev, &rdev->wdev_list, list) {
+		if (!wdev->netdev)
+			continue;
+		wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
+		err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
+		if (err)
+			break;
+		wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
+	}
+
+	if (err) {
+		/* failed -- clean up to old netns */
+		net = wiphy_net(&rdev->wiphy);
+
+		list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
+						     list) {
+			if (!wdev->netdev)
+				continue;
+			wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
+			err = dev_change_net_namespace(wdev->netdev, net,
+							"wlan%d");
+			WARN_ON(err);
+			wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
+		}
+
+		return err;
+	}
 
-struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
+	wiphy_net_set(&rdev->wiphy, net);
+
+	err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
+	WARN_ON(err);
+
+	return 0;
+}
+
+static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
 {
-	struct cfg80211_registered_device *drv;
-	int alloc_size;
+	struct cfg80211_registered_device *rdev = data;
 
-	WARN_ON(!ops->add_key && ops->del_key);
-	WARN_ON(ops->add_key && !ops->del_key);
+	rdev_rfkill_poll(rdev);
+}
 
-	alloc_size = sizeof(*drv) + sizeof_priv;
+void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
+			      struct wireless_dev *wdev)
+{
+	ASSERT_RTNL();
 
-	drv = kzalloc(alloc_size, GFP_KERNEL);
-	if (!drv)
-		return NULL;
+	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
+		return;
 
-	drv->ops = ops;
+	if (!wdev->p2p_started)
+		return;
 
-	mutex_lock(&cfg80211_drv_mutex);
+	rdev_stop_p2p_device(rdev, wdev);
+	wdev->p2p_started = false;
 
-	drv->idx = wiphy_counter;
+	rdev->opencount--;
 
-	/* now increase counter for the next device unless
-	 * it has wrapped previously */
-	if (wiphy_counter >= 0)
-		wiphy_counter++;
+	if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
+		if (WARN_ON(!rdev->scan_req->notified))
+			rdev->scan_req->aborted = true;
+		___cfg80211_scan_done(rdev, false);
+	}
+}
 
-	mutex_unlock(&cfg80211_drv_mutex);
+void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	struct wireless_dev *wdev;
 
-	if (unlikely(drv->idx < 0)) {
+	ASSERT_RTNL();
+
+	list_for_each_entry(wdev, &rdev->wdev_list, list) {
+		if (wdev->netdev) {
+			dev_close(wdev->netdev);
+			continue;
+		}
+		/* otherwise, check iftype */
+		switch (wdev->iftype) {
+		case NL80211_IFTYPE_P2P_DEVICE:
+			cfg80211_stop_p2p_device(rdev, wdev);
+			break;
+		default:
+			break;
+		}
+	}
+}
+EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
+
+static int cfg80211_rfkill_set_block(void *data, bool blocked)
+{
+	struct cfg80211_registered_device *rdev = data;
+
+	if (!blocked)
+		return 0;
+
+	rtnl_lock();
+	cfg80211_shutdown_all_interfaces(&rdev->wiphy);
+	rtnl_unlock();
+
+	return 0;
+}
+
+static void cfg80211_rfkill_sync_work(struct work_struct *work)
+{
+	struct cfg80211_registered_device *rdev;
+
+	rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
+	cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
+}
+
+static void cfg80211_event_work(struct work_struct *work)
+{
+	struct cfg80211_registered_device *rdev;
+
+	rdev = container_of(work, struct cfg80211_registered_device,
+			    event_work);
+
+	rtnl_lock();
+	cfg80211_process_rdev_events(rdev);
+	rtnl_unlock();
+}
+
+void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
+{
+	struct cfg80211_iface_destroy *item;
+
+	ASSERT_RTNL();
+
+	spin_lock_irq(&rdev->destroy_list_lock);
+	while ((item = list_first_entry_or_null(&rdev->destroy_list,
+						struct cfg80211_iface_destroy,
+						list))) {
+		struct wireless_dev *wdev, *tmp;
+		u32 nlportid = item->nlportid;
+
+		list_del(&item->list);
+		kfree(item);
+		spin_unlock_irq(&rdev->destroy_list_lock);
+
+		list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) {
+			if (nlportid == wdev->owner_nlportid)
+				rdev_del_virtual_intf(rdev, wdev);
+		}
+
+		spin_lock_irq(&rdev->destroy_list_lock);
+	}
+	spin_unlock_irq(&rdev->destroy_list_lock);
+}
+
+static void cfg80211_destroy_iface_wk(struct work_struct *work)
+{
+	struct cfg80211_registered_device *rdev;
+
+	rdev = container_of(work, struct cfg80211_registered_device,
+			    destroy_work);
+
+	rtnl_lock();
+	cfg80211_destroy_ifaces(rdev);
+	rtnl_unlock();
+}
+
+/* exported functions */
+
+struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
+{
+	static atomic_t wiphy_counter = ATOMIC_INIT(0);
+
+	struct cfg80211_registered_device *rdev;
+	int alloc_size;
+
+	WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
+	WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
+	WARN_ON(ops->connect && !ops->disconnect);
+	WARN_ON(ops->join_ibss && !ops->leave_ibss);
+	WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
+	WARN_ON(ops->add_station && !ops->del_station);
+	WARN_ON(ops->add_mpath && !ops->del_mpath);
+	WARN_ON(ops->join_mesh && !ops->leave_mesh);
+
+	alloc_size = sizeof(*rdev) + sizeof_priv;
+
+	rdev = kzalloc(alloc_size, GFP_KERNEL);
+	if (!rdev)
+		return NULL;
+
+	rdev->ops = ops;
+
+	rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
+
+	if (unlikely(rdev->wiphy_idx < 0)) {
 		/* ugh, wrapped! */
-		kfree(drv);
+		atomic_dec(&wiphy_counter);
+		kfree(rdev);
 		return NULL;
 	}
 
+	/* atomic_inc_return makes it start at 1, make it start at 0 */
+	rdev->wiphy_idx--;
+
 	/* give it a proper name */
-	snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE,
-		 PHY_NAME "%d", drv->idx);
+	dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
+
+	INIT_LIST_HEAD(&rdev->wdev_list);
+	INIT_LIST_HEAD(&rdev->beacon_registrations);
+	spin_lock_init(&rdev->beacon_registrations_lock);
+	spin_lock_init(&rdev->bss_lock);
+	INIT_LIST_HEAD(&rdev->bss_list);
+	INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
+	INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
+	INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
+			  cfg80211_dfs_channels_update_work);
+#ifdef CONFIG_CFG80211_WEXT
+	rdev->wiphy.wext = &cfg80211_wext_handler;
+#endif
+
+	device_initialize(&rdev->wiphy.dev);
+	rdev->wiphy.dev.class = &ieee80211_class;
+	rdev->wiphy.dev.platform_data = rdev;
+
+	INIT_LIST_HEAD(&rdev->destroy_list);
+	spin_lock_init(&rdev->destroy_list_lock);
+	INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
+
+#ifdef CONFIG_CFG80211_DEFAULT_PS
+	rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
+#endif
+
+	wiphy_net_set(&rdev->wiphy, &init_net);
+
+	rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
+	rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
+				   &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
+				   &rdev->rfkill_ops, rdev);
+
+	if (!rdev->rfkill) {
+		kfree(rdev);
+		return NULL;
+	}
+
+	INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
+	INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
+	INIT_WORK(&rdev->event_work, cfg80211_event_work);
+
+	init_waitqueue_head(&rdev->dev_wait);
 
-	mutex_init(&drv->mtx);
-	mutex_init(&drv->devlist_mtx);
-	INIT_LIST_HEAD(&drv->netdev_list);
+	/*
+	 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
+	 * Fragmentation and RTS threshold are disabled by default with the
+	 * special -1 value.
+	 */
+	rdev->wiphy.retry_short = 7;
+	rdev->wiphy.retry_long = 4;
+	rdev->wiphy.frag_threshold = (u32) -1;
+	rdev->wiphy.rts_threshold = (u32) -1;
+	rdev->wiphy.coverage_class = 0;
 
-	device_initialize(&drv->wiphy.dev);
-	drv->wiphy.dev.class = &ieee80211_class;
-	drv->wiphy.dev.platform_data = drv;
+	rdev->wiphy.max_num_csa_counters = 1;
 
-	return &drv->wiphy;
+	return &rdev->wiphy;
 }
 EXPORT_SYMBOL(wiphy_new);
 
+static int wiphy_verify_combinations(struct wiphy *wiphy)
+{
+	const struct ieee80211_iface_combination *c;
+	int i, j;
+
+	for (i = 0; i < wiphy->n_iface_combinations; i++) {
+		u32 cnt = 0;
+		u16 all_iftypes = 0;
+
+		c = &wiphy->iface_combinations[i];
+
+		/*
+		 * Combinations with just one interface aren't real,
+		 * however we make an exception for DFS.
+		 */
+		if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
+			return -EINVAL;
+
+		/* Need at least one channel */
+		if (WARN_ON(!c->num_different_channels))
+			return -EINVAL;
+
+		/*
+		 * Put a sane limit on maximum number of different
+		 * channels to simplify channel accounting code.
+		 */
+		if (WARN_ON(c->num_different_channels >
+				CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
+			return -EINVAL;
+
+		/* DFS only works on one channel. */
+		if (WARN_ON(c->radar_detect_widths &&
+			    (c->num_different_channels > 1)))
+			return -EINVAL;
+
+		if (WARN_ON(!c->n_limits))
+			return -EINVAL;
+
+		for (j = 0; j < c->n_limits; j++) {
+			u16 types = c->limits[j].types;
+
+			/* interface types shouldn't overlap */
+			if (WARN_ON(types & all_iftypes))
+				return -EINVAL;
+			all_iftypes |= types;
+
+			if (WARN_ON(!c->limits[j].max))
+				return -EINVAL;
+
+			/* Shouldn't list software iftypes in combinations! */
+			if (WARN_ON(wiphy->software_iftypes & types))
+				return -EINVAL;
+
+			/* Only a single P2P_DEVICE can be allowed */
+			if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
+				    c->limits[j].max > 1))
+				return -EINVAL;
+
+			cnt += c->limits[j].max;
+			/*
+			 * Don't advertise an unsupported type
+			 * in a combination.
+			 */
+			if (WARN_ON((wiphy->interface_modes & types) != types))
+				return -EINVAL;
+		}
+
+		/* You can't even choose that many! */
+		if (WARN_ON(cnt < c->max_interfaces))
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
 int wiphy_register(struct wiphy *wiphy)
 {
-	struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 	int res;
+	enum ieee80211_band band;
+	struct ieee80211_supported_band *sband;
+	bool have_band = false;
+	int i;
+	u16 ifmodes = wiphy->interface_modes;
 
-	mutex_lock(&cfg80211_drv_mutex);
-
-	res = device_add(&drv->wiphy.dev);
+	/*
+	 * There are major locking problems in nl80211/mac80211 for CSA,
+	 * disable for all drivers until this has been reworked.
+	 */
+	wiphy->flags &= ~WIPHY_FLAG_HAS_CHANNEL_SWITCH;
+
+#ifdef CONFIG_PM
+	if (WARN_ON(wiphy->wowlan &&
+		    (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
+		    !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
+		return -EINVAL;
+	if (WARN_ON(wiphy->wowlan &&
+		    !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
+		    !wiphy->wowlan->tcp))
+		return -EINVAL;
+#endif
+
+	if (WARN_ON(wiphy->coalesce &&
+		    (!wiphy->coalesce->n_rules ||
+		     !wiphy->coalesce->n_patterns) &&
+		    (!wiphy->coalesce->pattern_min_len ||
+		     wiphy->coalesce->pattern_min_len >
+			wiphy->coalesce->pattern_max_len)))
+		return -EINVAL;
+
+	if (WARN_ON(wiphy->ap_sme_capa &&
+		    !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
+		return -EINVAL;
+
+	if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
+		return -EINVAL;
+
+	if (WARN_ON(wiphy->addresses &&
+		    !is_zero_ether_addr(wiphy->perm_addr) &&
+		    memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
+			   ETH_ALEN)))
+		return -EINVAL;
+
+	if (WARN_ON(wiphy->max_acl_mac_addrs &&
+		    (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
+		     !rdev->ops->set_mac_acl)))
+		return -EINVAL;
+
+	if (wiphy->addresses)
+		memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
+
+	/* sanity check ifmodes */
+	WARN_ON(!ifmodes);
+	ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
+	if (WARN_ON(ifmodes != wiphy->interface_modes))
+		wiphy->interface_modes = ifmodes;
+
+	res = wiphy_verify_combinations(wiphy);
 	if (res)
-		goto out_unlock;
+		return res;
+
+	/* sanity check supported bands/channels */
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		sband = wiphy->bands[band];
+		if (!sband)
+			continue;
 
-	list_add(&drv->list, &cfg80211_drv_list);
+		sband->band = band;
+		if (WARN_ON(!sband->n_channels))
+			return -EINVAL;
+		/*
+		 * on 60gHz band, there are no legacy rates, so
+		 * n_bitrates is 0
+		 */
+		if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
+			    !sband->n_bitrates))
+			return -EINVAL;
+
+		/*
+		 * Since cfg80211_disable_40mhz_24ghz is global, we can
+		 * modify the sband's ht data even if the driver uses a
+		 * global structure for that.
+		 */
+		if (cfg80211_disable_40mhz_24ghz &&
+		    band == IEEE80211_BAND_2GHZ &&
+		    sband->ht_cap.ht_supported) {
+			sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
+		}
+
+		/*
+		 * Since we use a u32 for rate bitmaps in
+		 * ieee80211_get_response_rate, we cannot
+		 * have more than 32 legacy rates.
+		 */
+		if (WARN_ON(sband->n_bitrates > 32))
+			return -EINVAL;
+
+		for (i = 0; i < sband->n_channels; i++) {
+			sband->channels[i].orig_flags =
+				sband->channels[i].flags;
+			sband->channels[i].orig_mag = INT_MAX;
+			sband->channels[i].orig_mpwr =
+				sband->channels[i].max_power;
+			sband->channels[i].band = band;
+		}
+
+		have_band = true;
+	}
+
+	if (!have_band) {
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+#ifdef CONFIG_PM
+	if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
+		    (!rdev->wiphy.wowlan->pattern_min_len ||
+		     rdev->wiphy.wowlan->pattern_min_len >
+				rdev->wiphy.wowlan->pattern_max_len)))
+		return -EINVAL;
+#endif
+
+	/* check and set up bitrates */
+	ieee80211_set_bitrate_flags(wiphy);
+
+	rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
+
+	rtnl_lock();
+	res = device_add(&rdev->wiphy.dev);
+	if (res) {
+		rtnl_unlock();
+		return res;
+	}
+
+	/* set up regulatory info */
+	wiphy_regulatory_register(wiphy);
+
+	list_add_rcu(&rdev->list, &cfg80211_rdev_list);
+	cfg80211_rdev_list_generation++;
 
 	/* add to debugfs */
-	drv->wiphy.debugfsdir =
-		debugfs_create_dir(wiphy_name(&drv->wiphy),
+	rdev->wiphy.debugfsdir =
+		debugfs_create_dir(wiphy_name(&rdev->wiphy),
 				   ieee80211_debugfs_dir);
+	if (IS_ERR(rdev->wiphy.debugfsdir))
+		rdev->wiphy.debugfsdir = NULL;
+
+	if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
+		struct regulatory_request request;
+
+		request.wiphy_idx = get_wiphy_idx(wiphy);
+		request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
+		request.alpha2[0] = '9';
+		request.alpha2[1] = '9';
 
-	res = 0;
-out_unlock:
-	mutex_unlock(&cfg80211_drv_mutex);
-	return res;
+		nl80211_send_reg_change_event(&request);
+	}
+
+	cfg80211_debugfs_rdev_add(rdev);
+
+	rdev->wiphy.registered = true;
+	rtnl_unlock();
+
+	res = rfkill_register(rdev->rfkill);
+	if (res) {
+		rfkill_destroy(rdev->rfkill);
+		rdev->rfkill = NULL;
+		wiphy_unregister(&rdev->wiphy);
+		return res;
+	}
+
+	nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
+
+	return 0;
 }
 EXPORT_SYMBOL(wiphy_register);
 
+void wiphy_rfkill_start_polling(struct wiphy *wiphy)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	if (!rdev->ops->rfkill_poll)
+		return;
+	rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
+	rfkill_resume_polling(rdev->rfkill);
+}
+EXPORT_SYMBOL(wiphy_rfkill_start_polling);
+
+void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	rfkill_pause_polling(rdev->rfkill);
+}
+EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
+
 void wiphy_unregister(struct wiphy *wiphy)
 {
-	struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	wait_event(rdev->dev_wait, ({
+		int __count;
+		rtnl_lock();
+		__count = rdev->opencount;
+		rtnl_unlock();
+		__count == 0; }));
+
+	if (rdev->rfkill)
+		rfkill_unregister(rdev->rfkill);
 
-	/* protect the device list */
-	mutex_lock(&cfg80211_drv_mutex);
+	rtnl_lock();
+	nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
+	rdev->wiphy.registered = false;
 
-	BUG_ON(!list_empty(&drv->netdev_list));
+	WARN_ON(!list_empty(&rdev->wdev_list));
 
 	/*
-	 * Try to grab drv->mtx. If a command is still in progress,
-	 * hopefully the driver will refuse it since it's tearing
-	 * down the device already. We wait for this command to complete
-	 * before unlinking the item from the list.
-	 * Note: as codified by the BUG_ON above we cannot get here if
-	 * a virtual interface is still associated. Hence, we can only
-	 * get to lock contention here if userspace issues a command
-	 * that identified the hardware by wiphy index.
+	 * First remove the hardware from everywhere, this makes
+	 * it impossible to find from userspace.
 	 */
-	mutex_lock(&drv->mtx);
-	/* unlock again before freeing */
-	mutex_unlock(&drv->mtx);
+	debugfs_remove_recursive(rdev->wiphy.debugfsdir);
+	list_del_rcu(&rdev->list);
+	synchronize_rcu();
 
-	list_del(&drv->list);
-	device_del(&drv->wiphy.dev);
-	debugfs_remove(drv->wiphy.debugfsdir);
+	/*
+	 * If this device got a regulatory hint tell core its
+	 * free to listen now to a new shiny device regulatory hint
+	 */
+	wiphy_regulatory_deregister(wiphy);
+
+	cfg80211_rdev_list_generation++;
+	device_del(&rdev->wiphy.dev);
+
+	rtnl_unlock();
+
+	flush_work(&rdev->scan_done_wk);
+	cancel_work_sync(&rdev->conn_work);
+	flush_work(&rdev->event_work);
+	cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
+	flush_work(&rdev->destroy_work);
 
-	mutex_unlock(&cfg80211_drv_mutex);
+#ifdef CONFIG_PM
+	if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
+		rdev_set_wakeup(rdev, false);
+#endif
+	cfg80211_rdev_free_wowlan(rdev);
+	cfg80211_rdev_free_coalesce(rdev);
 }
 EXPORT_SYMBOL(wiphy_unregister);
 
-void cfg80211_dev_free(struct cfg80211_registered_device *drv)
+void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
 {
-	mutex_destroy(&drv->mtx);
-	mutex_destroy(&drv->devlist_mtx);
-	kfree(drv);
+	struct cfg80211_internal_bss *scan, *tmp;
+	struct cfg80211_beacon_registration *reg, *treg;
+	rfkill_destroy(rdev->rfkill);
+	list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
+		list_del(&reg->list);
+		kfree(reg);
+	}
+	list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
+		cfg80211_put_bss(&rdev->wiphy, &scan->pub);
+	kfree(rdev);
 }
 
 void wiphy_free(struct wiphy *wiphy)
@@ -297,50 +759,327 @@ void wiphy_free(struct wiphy *wiphy)
 }
 EXPORT_SYMBOL(wiphy_free);
 
-static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
-					 unsigned long state,
-					 void *ndev)
+void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	if (rfkill_set_hw_state(rdev->rfkill, blocked))
+		schedule_work(&rdev->rfkill_sync);
+}
+EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
+
+void cfg80211_unregister_wdev(struct wireless_dev *wdev)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+
+	ASSERT_RTNL();
+
+	if (WARN_ON(wdev->netdev))
+		return;
+
+	list_del_rcu(&wdev->list);
+	rdev->devlist_generation++;
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_P2P_DEVICE:
+		cfg80211_stop_p2p_device(rdev, wdev);
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		break;
+	}
+}
+EXPORT_SYMBOL(cfg80211_unregister_wdev);
+
+static const struct device_type wiphy_type = {
+	.name	= "wlan",
+};
+
+void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
+			       enum nl80211_iftype iftype, int num)
+{
+	ASSERT_RTNL();
+
+	rdev->num_running_ifaces += num;
+	if (iftype == NL80211_IFTYPE_MONITOR)
+		rdev->num_running_monitor_ifaces += num;
+}
+
+void __cfg80211_leave(struct cfg80211_registered_device *rdev,
+		      struct wireless_dev *wdev)
 {
-	struct net_device *dev = ndev;
+	struct net_device *dev = wdev->netdev;
+
+	ASSERT_RTNL();
+	ASSERT_WDEV_LOCK(wdev);
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_ADHOC:
+		__cfg80211_leave_ibss(rdev, dev, true);
+		break;
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_STATION:
+		if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
+			__cfg80211_stop_sched_scan(rdev, false);
+
+#ifdef CONFIG_CFG80211_WEXT
+		kfree(wdev->wext.ie);
+		wdev->wext.ie = NULL;
+		wdev->wext.ie_len = 0;
+		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
+#endif
+		cfg80211_disconnect(rdev, dev,
+				    WLAN_REASON_DEAUTH_LEAVING, true);
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+		__cfg80211_leave_mesh(rdev, dev);
+		break;
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
+		__cfg80211_stop_ap(rdev, dev, true);
+		break;
+	default:
+		break;
+	}
+}
+
+void cfg80211_leave(struct cfg80211_registered_device *rdev,
+		    struct wireless_dev *wdev)
+{
+	wdev_lock(wdev);
+	__cfg80211_leave(rdev, wdev);
+	wdev_unlock(wdev);
+}
+
+void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
+			 gfp_t gfp)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	struct cfg80211_event *ev;
+	unsigned long flags;
+
+	trace_cfg80211_stop_iface(wiphy, wdev);
+
+	ev = kzalloc(sizeof(*ev), gfp);
+	if (!ev)
+		return;
+
+	ev->type = EVENT_STOPPED;
+
+	spin_lock_irqsave(&wdev->event_lock, flags);
+	list_add_tail(&ev->list, &wdev->event_list);
+	spin_unlock_irqrestore(&wdev->event_lock, flags);
+	queue_work(cfg80211_wq, &rdev->event_work);
+}
+EXPORT_SYMBOL(cfg80211_stop_iface);
+
+static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
+					 unsigned long state, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev;
 
-	if (!dev->ieee80211_ptr)
-		return 0;
+	if (!wdev)
+		return NOTIFY_DONE;
+
+	rdev = wiphy_to_rdev(wdev->wiphy);
 
-	rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+	WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
 
 	switch (state) {
+	case NETDEV_POST_INIT:
+		SET_NETDEV_DEVTYPE(dev, &wiphy_type);
+		break;
 	case NETDEV_REGISTER:
-		mutex_lock(&rdev->devlist_mtx);
-		list_add(&dev->ieee80211_ptr->list, &rdev->netdev_list);
+		/*
+		 * NB: cannot take rdev->mtx here because this may be
+		 * called within code protected by it when interfaces
+		 * are added with nl80211.
+		 */
+		mutex_init(&wdev->mtx);
+		INIT_LIST_HEAD(&wdev->event_list);
+		spin_lock_init(&wdev->event_lock);
+		INIT_LIST_HEAD(&wdev->mgmt_registrations);
+		spin_lock_init(&wdev->mgmt_registrations_lock);
+
+		wdev->identifier = ++rdev->wdev_id;
+		list_add_rcu(&wdev->list, &rdev->wdev_list);
+		rdev->devlist_generation++;
+		/* can only change netns with wiphy */
+		dev->features |= NETIF_F_NETNS_LOCAL;
+
 		if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
 				      "phy80211")) {
-			printk(KERN_ERR "wireless: failed to add phy80211 "
-				"symlink to netdev!\n");
+			pr_err("failed to add phy80211 symlink to netdev!\n");
+		}
+		wdev->netdev = dev;
+#ifdef CONFIG_CFG80211_WEXT
+		wdev->wext.default_key = -1;
+		wdev->wext.default_mgmt_key = -1;
+		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
+#endif
+
+		if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
+			wdev->ps = true;
+		else
+			wdev->ps = false;
+		/* allow mac80211 to determine the timeout */
+		wdev->ps_timeout = -1;
+
+		netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
+
+		if ((wdev->iftype == NL80211_IFTYPE_STATION ||
+		     wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
+		     wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
+			dev->priv_flags |= IFF_DONT_BRIDGE;
+		break;
+	case NETDEV_GOING_DOWN:
+		cfg80211_leave(rdev, wdev);
+		break;
+	case NETDEV_DOWN:
+		cfg80211_update_iface_num(rdev, wdev->iftype, -1);
+		if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
+			if (WARN_ON(!rdev->scan_req->notified))
+				rdev->scan_req->aborted = true;
+			___cfg80211_scan_done(rdev, false);
+		}
+
+		if (WARN_ON(rdev->sched_scan_req &&
+			    rdev->sched_scan_req->dev == wdev->netdev)) {
+			__cfg80211_stop_sched_scan(rdev, false);
 		}
-		dev->ieee80211_ptr->netdev = dev;
-		mutex_unlock(&rdev->devlist_mtx);
+
+		rdev->opencount--;
+		wake_up(&rdev->dev_wait);
+		break;
+	case NETDEV_UP:
+		cfg80211_update_iface_num(rdev, wdev->iftype, 1);
+		wdev_lock(wdev);
+		switch (wdev->iftype) {
+#ifdef CONFIG_CFG80211_WEXT
+		case NL80211_IFTYPE_ADHOC:
+			cfg80211_ibss_wext_join(rdev, wdev);
+			break;
+		case NL80211_IFTYPE_STATION:
+			cfg80211_mgd_wext_connect(rdev, wdev);
+			break;
+#endif
+#ifdef CONFIG_MAC80211_MESH
+		case NL80211_IFTYPE_MESH_POINT:
+			{
+				/* backward compat code... */
+				struct mesh_setup setup;
+				memcpy(&setup, &default_mesh_setup,
+						sizeof(setup));
+				 /* back compat only needed for mesh_id */
+				setup.mesh_id = wdev->ssid;
+				setup.mesh_id_len = wdev->mesh_id_up_len;
+				if (wdev->mesh_id_up_len)
+					__cfg80211_join_mesh(rdev, dev,
+							&setup,
+							&default_mesh_config);
+				break;
+			}
+#endif
+		default:
+			break;
+		}
+		wdev_unlock(wdev);
+		rdev->opencount++;
+
+		/*
+		 * Configure power management to the driver here so that its
+		 * correctly set also after interface type changes etc.
+		 */
+		if ((wdev->iftype == NL80211_IFTYPE_STATION ||
+		     wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
+		    rdev->ops->set_power_mgmt)
+			if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
+						wdev->ps_timeout)) {
+				/* assume this means it's off */
+				wdev->ps = false;
+			}
 		break;
 	case NETDEV_UNREGISTER:
-		mutex_lock(&rdev->devlist_mtx);
-		if (!list_empty(&dev->ieee80211_ptr->list)) {
+		/*
+		 * It is possible to get NETDEV_UNREGISTER
+		 * multiple times. To detect that, check
+		 * that the interface is still on the list
+		 * of registered interfaces, and only then
+		 * remove and clean it up.
+		 */
+		if (!list_empty(&wdev->list)) {
 			sysfs_remove_link(&dev->dev.kobj, "phy80211");
-			list_del_init(&dev->ieee80211_ptr->list);
+			list_del_rcu(&wdev->list);
+			rdev->devlist_generation++;
+			cfg80211_mlme_purge_registrations(wdev);
+#ifdef CONFIG_CFG80211_WEXT
+			kfree(wdev->wext.keys);
+#endif
 		}
-		mutex_unlock(&rdev->devlist_mtx);
+		/*
+		 * synchronise (so that we won't find this netdev
+		 * from other code any more) and then clear the list
+		 * head so that the above code can safely check for
+		 * !list_empty() to avoid double-cleanup.
+		 */
+		synchronize_rcu();
+		INIT_LIST_HEAD(&wdev->list);
+		/*
+		 * Ensure that all events have been processed and
+		 * freed.
+		 */
+		cfg80211_process_wdev_events(wdev);
+
+		if (WARN_ON(wdev->current_bss)) {
+			cfg80211_unhold_bss(wdev->current_bss);
+			cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
+			wdev->current_bss = NULL;
+		}
+		break;
+	case NETDEV_PRE_UP:
+		if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
+			return notifier_from_errno(-EOPNOTSUPP);
+		if (rfkill_blocked(rdev->rfkill))
+			return notifier_from_errno(-ERFKILL);
 		break;
+	default:
+		return NOTIFY_DONE;
 	}
 
-	return 0;
+	return NOTIFY_OK;
 }
 
 static struct notifier_block cfg80211_netdev_notifier = {
 	.notifier_call = cfg80211_netdev_notifier_call,
 };
 
-static int cfg80211_init(void)
+static void __net_exit cfg80211_pernet_exit(struct net *net)
+{
+	struct cfg80211_registered_device *rdev;
+
+	rtnl_lock();
+	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
+		if (net_eq(wiphy_net(&rdev->wiphy), net))
+			WARN_ON(cfg80211_switch_netns(rdev, &init_net));
+	}
+	rtnl_unlock();
+}
+
+static struct pernet_operations cfg80211_pernet_ops = {
+	.exit = cfg80211_pernet_exit,
+};
+
+static int __init cfg80211_init(void)
 {
-	int err = wiphy_sysfs_init();
+	int err;
+
+	err = register_pernet_device(&cfg80211_pernet_ops);
+	if (err)
+		goto out_fail_pernet;
+
+	err = wiphy_sysfs_init();
 	if (err)
 		goto out_fail_sysfs;
 
@@ -354,22 +1093,41 @@ static int cfg80211_init(void)
 
 	ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
 
+	err = regulatory_init();
+	if (err)
+		goto out_fail_reg;
+
+	cfg80211_wq = create_singlethread_workqueue("cfg80211");
+	if (!cfg80211_wq) {
+		err = -ENOMEM;
+		goto out_fail_wq;
+	}
+
 	return 0;
 
+out_fail_wq:
+	regulatory_exit();
+out_fail_reg:
+	debugfs_remove(ieee80211_debugfs_dir);
 out_fail_nl80211:
 	unregister_netdevice_notifier(&cfg80211_netdev_notifier);
 out_fail_notifier:
 	wiphy_sysfs_exit();
 out_fail_sysfs:
+	unregister_pernet_device(&cfg80211_pernet_ops);
+out_fail_pernet:
 	return err;
 }
 subsys_initcall(cfg80211_init);
 
-static void cfg80211_exit(void)
+static void __exit cfg80211_exit(void)
 {
 	debugfs_remove(ieee80211_debugfs_dir);
 	nl80211_exit();
 	unregister_netdevice_notifier(&cfg80211_netdev_notifier);
 	wiphy_sysfs_exit();
+	regulatory_exit();
+	unregister_pernet_device(&cfg80211_pernet_ops);
+	destroy_workqueue(cfg80211_wq);
 }
 module_exit(cfg80211_exit);