2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
8 #include <linux/module.h>
10 #include <linux/list.h>
11 #include <linux/nl80211.h>
12 #include <linux/debugfs.h>
13 #include <linux/notifier.h>
14 #include <linux/device.h>
15 #include <linux/etherdevice.h>
16 #include <linux/rtnetlink.h>
17 #include <linux/sched.h>
18 #include <net/genetlink.h>
19 #include <net/cfg80211.h>
24 #include "wext-compat.h"
27 /* name for sysfs, %d is appended */
28 #define PHY_NAME "phy"
30 MODULE_AUTHOR("Johannes Berg");
31 MODULE_LICENSE("GPL");
32 MODULE_DESCRIPTION("wireless configuration support");
34 /* RCU might be appropriate here since we usually
35 * only read the list, and that can happen quite
36 * often because we need to do it for each command */
37 LIST_HEAD(cfg80211_rdev_list);
38 int cfg80211_rdev_list_generation;
41 * This is used to protect the cfg80211_rdev_list
43 DEFINE_MUTEX(cfg80211_mutex);
46 static struct dentry *ieee80211_debugfs_dir;
48 /* for the cleanup, scan and event works */
49 struct workqueue_struct *cfg80211_wq;
51 /* requires cfg80211_mutex to be held! */
52 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
54 struct cfg80211_registered_device *result = NULL, *rdev;
56 if (!wiphy_idx_valid(wiphy_idx))
59 assert_cfg80211_lock();
61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
62 if (rdev->wiphy_idx == wiphy_idx) {
71 int get_wiphy_idx(struct wiphy *wiphy)
73 struct cfg80211_registered_device *rdev;
75 return WIPHY_IDX_STALE;
76 rdev = wiphy_to_dev(wiphy);
77 return rdev->wiphy_idx;
80 /* requires cfg80211_rdev_mutex to be held! */
81 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
83 struct cfg80211_registered_device *rdev;
85 if (!wiphy_idx_valid(wiphy_idx))
88 assert_cfg80211_lock();
90 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
96 /* requires cfg80211_mutex to be held! */
97 struct cfg80211_registered_device *
98 __cfg80211_rdev_from_info(struct genl_info *info)
101 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
102 struct net_device *dev;
105 assert_cfg80211_lock();
107 if (info->attrs[NL80211_ATTR_WIPHY]) {
108 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
109 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
113 if (info->attrs[NL80211_ATTR_IFINDEX]) {
114 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
115 dev = dev_get_by_index(genl_info_net(info), ifindex);
117 if (dev->ieee80211_ptr)
119 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
125 if (bywiphyidx && byifidx) {
126 if (bywiphyidx != byifidx)
127 return ERR_PTR(-EINVAL);
129 return bywiphyidx; /* == byifidx */
140 struct cfg80211_registered_device *
141 cfg80211_get_dev_from_info(struct genl_info *info)
143 struct cfg80211_registered_device *rdev;
145 mutex_lock(&cfg80211_mutex);
146 rdev = __cfg80211_rdev_from_info(info);
148 /* if it is not an error we grab the lock on
149 * it to assure it won't be going away while
150 * we operate on it */
152 mutex_lock(&rdev->mtx);
154 mutex_unlock(&cfg80211_mutex);
159 struct cfg80211_registered_device *
160 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
162 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
163 struct net_device *dev;
165 mutex_lock(&cfg80211_mutex);
166 dev = dev_get_by_index(net, ifindex);
169 if (dev->ieee80211_ptr) {
170 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
171 mutex_lock(&rdev->mtx);
173 rdev = ERR_PTR(-ENODEV);
176 mutex_unlock(&cfg80211_mutex);
180 /* requires cfg80211_mutex to be held */
181 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
184 struct cfg80211_registered_device *rdev2;
185 int wiphy_idx, taken = -1, result, digits;
187 assert_cfg80211_lock();
189 /* prohibit calling the thing phy%d when %d is not its number */
190 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
191 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
192 /* count number of places needed to print wiphy_idx */
194 while (wiphy_idx /= 10)
197 * deny the name if it is phy<idx> where <idx> is printed
198 * without leading zeroes. taken == strlen(newname) here
200 if (taken == strlen(PHY_NAME) + digits)
205 /* Ignore nop renames */
206 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
209 /* Ensure another device does not already have this name. */
210 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
211 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
214 result = device_rename(&rdev->wiphy.dev, newname);
218 if (rdev->wiphy.debugfsdir &&
219 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
220 rdev->wiphy.debugfsdir,
221 rdev->wiphy.debugfsdir->d_parent,
223 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
226 nl80211_notify_dev_rename(rdev);
231 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
234 struct wireless_dev *wdev;
237 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
240 list_for_each_entry(wdev, &rdev->netdev_list, list) {
241 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
242 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
245 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
249 /* failed -- clean up to old netns */
250 net = wiphy_net(&rdev->wiphy);
252 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
254 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
255 err = dev_change_net_namespace(wdev->netdev, net,
258 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
262 wiphy_net_set(&rdev->wiphy, net);
267 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
269 struct cfg80211_registered_device *rdev = data;
271 rdev->ops->rfkill_poll(&rdev->wiphy);
274 static int cfg80211_rfkill_set_block(void *data, bool blocked)
276 struct cfg80211_registered_device *rdev = data;
277 struct wireless_dev *wdev;
283 mutex_lock(&rdev->devlist_mtx);
285 list_for_each_entry(wdev, &rdev->netdev_list, list)
286 dev_close(wdev->netdev);
288 mutex_unlock(&rdev->devlist_mtx);
294 static void cfg80211_rfkill_sync_work(struct work_struct *work)
296 struct cfg80211_registered_device *rdev;
298 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
299 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
302 static void cfg80211_event_work(struct work_struct *work)
304 struct cfg80211_registered_device *rdev;
306 rdev = container_of(work, struct cfg80211_registered_device,
310 cfg80211_lock_rdev(rdev);
312 cfg80211_process_rdev_events(rdev);
313 cfg80211_unlock_rdev(rdev);
317 /* exported functions */
319 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
321 static int wiphy_counter;
323 struct cfg80211_registered_device *rdev;
326 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
327 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
328 WARN_ON(ops->connect && !ops->disconnect);
329 WARN_ON(ops->join_ibss && !ops->leave_ibss);
330 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
331 WARN_ON(ops->add_station && !ops->del_station);
332 WARN_ON(ops->add_mpath && !ops->del_mpath);
334 alloc_size = sizeof(*rdev) + sizeof_priv;
336 rdev = kzalloc(alloc_size, GFP_KERNEL);
342 mutex_lock(&cfg80211_mutex);
344 rdev->wiphy_idx = wiphy_counter++;
346 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
348 mutex_unlock(&cfg80211_mutex);
354 mutex_unlock(&cfg80211_mutex);
356 /* give it a proper name */
357 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
359 mutex_init(&rdev->mtx);
360 mutex_init(&rdev->devlist_mtx);
361 INIT_LIST_HEAD(&rdev->netdev_list);
362 spin_lock_init(&rdev->bss_lock);
363 INIT_LIST_HEAD(&rdev->bss_list);
364 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
366 #ifdef CONFIG_CFG80211_WEXT
367 rdev->wiphy.wext = &cfg80211_wext_handler;
370 device_initialize(&rdev->wiphy.dev);
371 rdev->wiphy.dev.class = &ieee80211_class;
372 rdev->wiphy.dev.platform_data = rdev;
374 #ifdef CONFIG_CFG80211_DEFAULT_PS
375 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
378 wiphy_net_set(&rdev->wiphy, &init_net);
380 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
381 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
382 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
383 &rdev->rfkill_ops, rdev);
390 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
391 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
392 INIT_WORK(&rdev->event_work, cfg80211_event_work);
394 init_waitqueue_head(&rdev->dev_wait);
397 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
398 * Fragmentation and RTS threshold are disabled by default with the
401 rdev->wiphy.retry_short = 7;
402 rdev->wiphy.retry_long = 4;
403 rdev->wiphy.frag_threshold = (u32) -1;
404 rdev->wiphy.rts_threshold = (u32) -1;
408 EXPORT_SYMBOL(wiphy_new);
410 int wiphy_register(struct wiphy *wiphy)
412 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
414 enum ieee80211_band band;
415 struct ieee80211_supported_band *sband;
416 bool have_band = false;
418 u16 ifmodes = wiphy->interface_modes;
420 /* sanity check ifmodes */
422 ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
423 if (WARN_ON(ifmodes != wiphy->interface_modes))
424 wiphy->interface_modes = ifmodes;
426 /* sanity check supported bands/channels */
427 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
428 sband = wiphy->bands[band];
434 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
438 * Since we use a u32 for rate bitmaps in
439 * ieee80211_get_response_rate, we cannot
440 * have more than 32 legacy rates.
442 if (WARN_ON(sband->n_bitrates > 32))
445 for (i = 0; i < sband->n_channels; i++) {
446 sband->channels[i].orig_flags =
447 sband->channels[i].flags;
448 sband->channels[i].orig_mag =
449 sband->channels[i].max_antenna_gain;
450 sband->channels[i].orig_mpwr =
451 sband->channels[i].max_power;
452 sband->channels[i].band = band;
463 /* check and set up bitrates */
464 ieee80211_set_bitrate_flags(wiphy);
466 res = device_add(&rdev->wiphy.dev);
470 res = rfkill_register(rdev->rfkill);
474 mutex_lock(&cfg80211_mutex);
476 /* set up regulatory info */
477 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
479 list_add(&rdev->list, &cfg80211_rdev_list);
480 cfg80211_rdev_list_generation++;
482 mutex_unlock(&cfg80211_mutex);
485 rdev->wiphy.debugfsdir =
486 debugfs_create_dir(wiphy_name(&rdev->wiphy),
487 ieee80211_debugfs_dir);
488 if (IS_ERR(rdev->wiphy.debugfsdir))
489 rdev->wiphy.debugfsdir = NULL;
491 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
492 struct regulatory_request request;
494 request.wiphy_idx = get_wiphy_idx(wiphy);
495 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
496 request.alpha2[0] = '9';
497 request.alpha2[1] = '9';
499 nl80211_send_reg_change_event(&request);
502 cfg80211_debugfs_rdev_add(rdev);
507 device_del(&rdev->wiphy.dev);
510 EXPORT_SYMBOL(wiphy_register);
512 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
514 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
516 if (!rdev->ops->rfkill_poll)
518 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
519 rfkill_resume_polling(rdev->rfkill);
521 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
523 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
525 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
527 rfkill_pause_polling(rdev->rfkill);
529 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
531 void wiphy_unregister(struct wiphy *wiphy)
533 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
535 rfkill_unregister(rdev->rfkill);
537 /* protect the device list */
538 mutex_lock(&cfg80211_mutex);
540 wait_event(rdev->dev_wait, ({
542 mutex_lock(&rdev->devlist_mtx);
543 __count = rdev->opencount;
544 mutex_unlock(&rdev->devlist_mtx);
547 mutex_lock(&rdev->devlist_mtx);
548 BUG_ON(!list_empty(&rdev->netdev_list));
549 mutex_unlock(&rdev->devlist_mtx);
552 * First remove the hardware from everywhere, this makes
553 * it impossible to find from userspace.
555 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
556 list_del(&rdev->list);
559 * Try to grab rdev->mtx. If a command is still in progress,
560 * hopefully the driver will refuse it since it's tearing
561 * down the device already. We wait for this command to complete
562 * before unlinking the item from the list.
563 * Note: as codified by the BUG_ON above we cannot get here if
564 * a virtual interface is still present. Hence, we can only get
565 * to lock contention here if userspace issues a command that
566 * identified the hardware by wiphy index.
568 cfg80211_lock_rdev(rdev);
570 cfg80211_unlock_rdev(rdev);
572 /* If this device got a regulatory hint tell core its
573 * free to listen now to a new shiny device regulatory hint */
574 reg_device_remove(wiphy);
576 cfg80211_rdev_list_generation++;
577 device_del(&rdev->wiphy.dev);
579 mutex_unlock(&cfg80211_mutex);
581 flush_work(&rdev->scan_done_wk);
582 cancel_work_sync(&rdev->conn_work);
583 flush_work(&rdev->event_work);
585 EXPORT_SYMBOL(wiphy_unregister);
587 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
589 struct cfg80211_internal_bss *scan, *tmp;
590 rfkill_destroy(rdev->rfkill);
591 mutex_destroy(&rdev->mtx);
592 mutex_destroy(&rdev->devlist_mtx);
593 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
594 cfg80211_put_bss(&scan->pub);
598 void wiphy_free(struct wiphy *wiphy)
600 put_device(&wiphy->dev);
602 EXPORT_SYMBOL(wiphy_free);
604 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
606 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
608 if (rfkill_set_hw_state(rdev->rfkill, blocked))
609 schedule_work(&rdev->rfkill_sync);
611 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
613 static void wdev_cleanup_work(struct work_struct *work)
615 struct wireless_dev *wdev;
616 struct cfg80211_registered_device *rdev;
618 wdev = container_of(work, struct wireless_dev, cleanup_work);
619 rdev = wiphy_to_dev(wdev->wiphy);
621 cfg80211_lock_rdev(rdev);
623 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
624 rdev->scan_req->aborted = true;
625 ___cfg80211_scan_done(rdev, true);
628 cfg80211_unlock_rdev(rdev);
630 mutex_lock(&rdev->devlist_mtx);
632 mutex_unlock(&rdev->devlist_mtx);
633 wake_up(&rdev->dev_wait);
635 dev_put(wdev->netdev);
638 static struct device_type wiphy_type = {
642 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
646 struct net_device *dev = ndev;
647 struct wireless_dev *wdev = dev->ieee80211_ptr;
648 struct cfg80211_registered_device *rdev;
653 rdev = wiphy_to_dev(wdev->wiphy);
655 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
658 case NETDEV_POST_INIT:
659 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
661 case NETDEV_REGISTER:
663 * NB: cannot take rdev->mtx here because this may be
664 * called within code protected by it when interfaces
665 * are added with nl80211.
667 mutex_init(&wdev->mtx);
668 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
669 INIT_LIST_HEAD(&wdev->event_list);
670 spin_lock_init(&wdev->event_lock);
671 mutex_lock(&rdev->devlist_mtx);
672 list_add(&wdev->list, &rdev->netdev_list);
673 rdev->devlist_generation++;
674 /* can only change netns with wiphy */
675 dev->features |= NETIF_F_NETNS_LOCAL;
677 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
679 printk(KERN_ERR "wireless: failed to add phy80211 "
680 "symlink to netdev!\n");
683 wdev->sme_state = CFG80211_SME_IDLE;
684 mutex_unlock(&rdev->devlist_mtx);
685 #ifdef CONFIG_CFG80211_WEXT
686 wdev->wext.default_key = -1;
687 wdev->wext.default_mgmt_key = -1;
688 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
689 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
690 wdev->wext.ps = true;
692 wdev->wext.ps = false;
693 wdev->wext.ps_timeout = 100;
694 if (rdev->ops->set_power_mgmt)
695 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
697 wdev->wext.ps_timeout)) {
698 /* assume this means it's off */
699 wdev->wext.ps = false;
702 if (!dev->ethtool_ops)
703 dev->ethtool_ops = &cfg80211_ethtool_ops;
705 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
706 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
707 dev->priv_flags |= IFF_DONT_BRIDGE;
709 case NETDEV_GOING_DOWN:
710 switch (wdev->iftype) {
711 case NL80211_IFTYPE_ADHOC:
712 cfg80211_leave_ibss(rdev, dev, true);
714 case NL80211_IFTYPE_STATION:
716 #ifdef CONFIG_CFG80211_WEXT
717 kfree(wdev->wext.ie);
718 wdev->wext.ie = NULL;
719 wdev->wext.ie_len = 0;
720 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
722 __cfg80211_disconnect(rdev, dev,
723 WLAN_REASON_DEAUTH_LEAVING, true);
724 cfg80211_mlme_down(rdev, dev);
733 queue_work(cfg80211_wq, &wdev->cleanup_work);
737 * If we have a really quick DOWN/UP succession we may
738 * have this work still pending ... cancel it and see
739 * if it was pending, in which case we need to account
740 * for some of the work it would have done.
742 if (cancel_work_sync(&wdev->cleanup_work)) {
743 mutex_lock(&rdev->devlist_mtx);
745 mutex_unlock(&rdev->devlist_mtx);
748 #ifdef CONFIG_CFG80211_WEXT
749 cfg80211_lock_rdev(rdev);
750 mutex_lock(&rdev->devlist_mtx);
752 switch (wdev->iftype) {
753 case NL80211_IFTYPE_ADHOC:
754 cfg80211_ibss_wext_join(rdev, wdev);
756 case NL80211_IFTYPE_STATION:
757 cfg80211_mgd_wext_connect(rdev, wdev);
764 mutex_unlock(&rdev->devlist_mtx);
765 cfg80211_unlock_rdev(rdev);
768 case NETDEV_UNREGISTER:
770 * NB: cannot take rdev->mtx here because this may be
771 * called within code protected by it when interfaces
772 * are removed with nl80211.
774 mutex_lock(&rdev->devlist_mtx);
776 * It is possible to get NETDEV_UNREGISTER
777 * multiple times. To detect that, check
778 * that the interface is still on the list
779 * of registered interfaces, and only then
780 * remove and clean it up.
782 if (!list_empty(&wdev->list)) {
783 sysfs_remove_link(&dev->dev.kobj, "phy80211");
784 list_del_init(&wdev->list);
785 rdev->devlist_generation++;
786 #ifdef CONFIG_CFG80211_WEXT
787 kfree(wdev->wext.keys);
790 mutex_unlock(&rdev->devlist_mtx);
793 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
794 return notifier_from_errno(-EOPNOTSUPP);
795 if (rfkill_blocked(rdev->rfkill))
796 return notifier_from_errno(-ERFKILL);
803 static struct notifier_block cfg80211_netdev_notifier = {
804 .notifier_call = cfg80211_netdev_notifier_call,
807 static void __net_exit cfg80211_pernet_exit(struct net *net)
809 struct cfg80211_registered_device *rdev;
812 mutex_lock(&cfg80211_mutex);
813 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
814 if (net_eq(wiphy_net(&rdev->wiphy), net))
815 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
817 mutex_unlock(&cfg80211_mutex);
821 static struct pernet_operations cfg80211_pernet_ops = {
822 .exit = cfg80211_pernet_exit,
825 static int __init cfg80211_init(void)
829 err = register_pernet_device(&cfg80211_pernet_ops);
831 goto out_fail_pernet;
833 err = wiphy_sysfs_init();
837 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
839 goto out_fail_notifier;
841 err = nl80211_init();
843 goto out_fail_nl80211;
845 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
847 err = regulatory_init();
851 cfg80211_wq = create_singlethread_workqueue("cfg80211");
860 debugfs_remove(ieee80211_debugfs_dir);
862 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
866 unregister_pernet_device(&cfg80211_pernet_ops);
870 subsys_initcall(cfg80211_init);
872 static void cfg80211_exit(void)
874 debugfs_remove(ieee80211_debugfs_dir);
876 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
879 unregister_pernet_device(&cfg80211_pernet_ops);
880 destroy_workqueue(cfg80211_wq);
882 module_exit(cfg80211_exit);