main.c revision 12375ef933fa8271396ed0c1e318cb1bd2e2689d 
1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <net/mac80211.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/netdevice.h>
15#include <linux/types.h>
16#include <linux/slab.h>
17#include <linux/skbuff.h>
18#include <linux/etherdevice.h>
19#include <linux/if_arp.h>
20#include <linux/wireless.h>
21#include <linux/rtnetlink.h>
22#include <linux/bitmap.h>
23#include <linux/pm_qos_params.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26
27#include "ieee80211_i.h"
28#include "driver-ops.h"
29#include "rate.h"
30#include "mesh.h"
31#include "wep.h"
32#include "led.h"
33#include "cfg.h"
34#include "debugfs.h"
35
36void ieee80211_configure_filter(struct ieee80211_local *local)
37{
38	u64 mc;
39	unsigned int changed_flags;
40	unsigned int new_flags = 0;
41
42	if (atomic_read(&local->iff_promiscs))
43		new_flags |= FIF_PROMISC_IN_BSS;
44
45	if (atomic_read(&local->iff_allmultis))
46		new_flags |= FIF_ALLMULTI;
47
48	if (local->monitors || local->scanning)
49		new_flags |= FIF_BCN_PRBRESP_PROMISC;
50
51	if (local->fif_fcsfail)
52		new_flags |= FIF_FCSFAIL;
53
54	if (local->fif_plcpfail)
55		new_flags |= FIF_PLCPFAIL;
56
57	if (local->fif_control)
58		new_flags |= FIF_CONTROL;
59
60	if (local->fif_other_bss)
61		new_flags |= FIF_OTHER_BSS;
62
63	if (local->fif_pspoll)
64		new_flags |= FIF_PSPOLL;
65
66	spin_lock_bh(&local->filter_lock);
67	changed_flags = local->filter_flags ^ new_flags;
68
69	mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
70	spin_unlock_bh(&local->filter_lock);
71
72	/* be a bit nasty */
73	new_flags |= (1<<31);
74
75	drv_configure_filter(local, changed_flags, &new_flags, mc);
76
77	WARN_ON(new_flags & (1<<31));
78
79	local->filter_flags = new_flags & ~(1<<31);
80}
81
82static void ieee80211_reconfig_filter(struct work_struct *work)
83{
84	struct ieee80211_local *local =
85		container_of(work, struct ieee80211_local, reconfig_filter);
86
87	ieee80211_configure_filter(local);
88}
89
90int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
91{
92	struct ieee80211_channel *chan, *scan_chan;
93	int ret = 0;
94	int power;
95	enum nl80211_channel_type channel_type;
96
97	might_sleep();
98
99	scan_chan = local->scan_channel;
100
101	if (scan_chan) {
102		chan = scan_chan;
103		channel_type = NL80211_CHAN_NO_HT;
104	} else {
105		chan = local->oper_channel;
106		channel_type = local->oper_channel_type;
107	}
108
109	if (chan != local->hw.conf.channel ||
110	    channel_type != local->hw.conf.channel_type) {
111		local->hw.conf.channel = chan;
112		local->hw.conf.channel_type = channel_type;
113		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
114	}
115
116	if (scan_chan)
117		power = chan->max_power;
118	else
119		power = local->power_constr_level ?
120			(chan->max_power - local->power_constr_level) :
121			chan->max_power;
122
123	if (local->user_power_level >= 0)
124		power = min(power, local->user_power_level);
125
126	if (local->hw.conf.power_level != power) {
127		changed |= IEEE80211_CONF_CHANGE_POWER;
128		local->hw.conf.power_level = power;
129	}
130
131	if (changed && local->open_count) {
132		ret = drv_config(local, changed);
133		/*
134		 * Goal:
135		 * HW reconfiguration should never fail, the driver has told
136		 * us what it can support so it should live up to that promise.
137		 *
138		 * Current status:
139		 * rfkill is not integrated with mac80211 and a
140		 * configuration command can thus fail if hardware rfkill
141		 * is enabled
142		 *
143		 * FIXME: integrate rfkill with mac80211 and then add this
144		 * WARN_ON() back
145		 *
146		 */
147		/* WARN_ON(ret); */
148	}
149
150	return ret;
151}
152
153void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
154				      u32 changed)
155{
156	struct ieee80211_local *local = sdata->local;
157	static const u8 zero[ETH_ALEN] = { 0 };
158
159	if (!changed)
160		return;
161
162	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
163		/*
164		 * While not associated, claim a BSSID of all-zeroes
165		 * so that drivers don't do any weird things with the
166		 * BSSID at that time.
167		 */
168		if (sdata->vif.bss_conf.assoc)
169			sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
170		else
171			sdata->vif.bss_conf.bssid = zero;
172	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
173		sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
174	else if (sdata->vif.type == NL80211_IFTYPE_AP)
175		sdata->vif.bss_conf.bssid = sdata->vif.addr;
176	else if (ieee80211_vif_is_mesh(&sdata->vif)) {
177		sdata->vif.bss_conf.bssid = zero;
178	} else {
179		WARN_ON(1);
180		return;
181	}
182
183	switch (sdata->vif.type) {
184	case NL80211_IFTYPE_AP:
185	case NL80211_IFTYPE_ADHOC:
186	case NL80211_IFTYPE_MESH_POINT:
187		break;
188	default:
189		/* do not warn to simplify caller in scan.c */
190		changed &= ~BSS_CHANGED_BEACON_ENABLED;
191		if (WARN_ON(changed & BSS_CHANGED_BEACON))
192			return;
193		break;
194	}
195
196	if (changed & BSS_CHANGED_BEACON_ENABLED) {
197		if (local->quiescing || !netif_running(sdata->dev) ||
198		    test_bit(SCAN_SW_SCANNING, &local->scanning)) {
199			sdata->vif.bss_conf.enable_beacon = false;
200		} else {
201			/*
202			 * Beacon should be enabled, but AP mode must
203			 * check whether there is a beacon configured.
204			 */
205			switch (sdata->vif.type) {
206			case NL80211_IFTYPE_AP:
207				sdata->vif.bss_conf.enable_beacon =
208					!!rcu_dereference(sdata->u.ap.beacon);
209				break;
210			case NL80211_IFTYPE_ADHOC:
211				sdata->vif.bss_conf.enable_beacon =
212					!!rcu_dereference(sdata->u.ibss.presp);
213				break;
214			case NL80211_IFTYPE_MESH_POINT:
215				sdata->vif.bss_conf.enable_beacon = true;
216				break;
217			default:
218				/* not reached */
219				WARN_ON(1);
220				break;
221			}
222		}
223	}
224
225	drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
226}
227
228u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
229{
230	sdata->vif.bss_conf.use_cts_prot = false;
231	sdata->vif.bss_conf.use_short_preamble = false;
232	sdata->vif.bss_conf.use_short_slot = false;
233	return BSS_CHANGED_ERP_CTS_PROT |
234	       BSS_CHANGED_ERP_PREAMBLE |
235	       BSS_CHANGED_ERP_SLOT;
236}
237
238static void ieee80211_tasklet_handler(unsigned long data)
239{
240	struct ieee80211_local *local = (struct ieee80211_local *) data;
241	struct sk_buff *skb;
242	struct ieee80211_ra_tid *ra_tid;
243
244	while ((skb = skb_dequeue(&local->skb_queue)) ||
245	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
246		switch (skb->pkt_type) {
247		case IEEE80211_RX_MSG:
248			/* Clear skb->pkt_type in order to not confuse kernel
249			 * netstack. */
250			skb->pkt_type = 0;
251			ieee80211_rx(local_to_hw(local), skb);
252			break;
253		case IEEE80211_TX_STATUS_MSG:
254			skb->pkt_type = 0;
255			ieee80211_tx_status(local_to_hw(local), skb);
256			break;
257		case IEEE80211_DELBA_MSG:
258			ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
259			ieee80211_stop_tx_ba_cb(ra_tid->vif, ra_tid->ra,
260						ra_tid->tid);
261			dev_kfree_skb(skb);
262			break;
263		case IEEE80211_ADDBA_MSG:
264			ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
265			ieee80211_start_tx_ba_cb(ra_tid->vif, ra_tid->ra,
266						 ra_tid->tid);
267			dev_kfree_skb(skb);
268			break ;
269		default:
270			WARN(1, "mac80211: Packet is of unknown type %d\n",
271			     skb->pkt_type);
272			dev_kfree_skb(skb);
273			break;
274		}
275	}
276}
277
278static void ieee80211_restart_work(struct work_struct *work)
279{
280	struct ieee80211_local *local =
281		container_of(work, struct ieee80211_local, restart_work);
282
283	rtnl_lock();
284	ieee80211_reconfig(local);
285	rtnl_unlock();
286}
287
288void ieee80211_restart_hw(struct ieee80211_hw *hw)
289{
290	struct ieee80211_local *local = hw_to_local(hw);
291
292	/* use this reason, __ieee80211_resume will unblock it */
293	ieee80211_stop_queues_by_reason(hw,
294		IEEE80211_QUEUE_STOP_REASON_SUSPEND);
295
296	schedule_work(&local->restart_work);
297}
298EXPORT_SYMBOL(ieee80211_restart_hw);
299
300struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
301					const struct ieee80211_ops *ops)
302{
303	struct ieee80211_local *local;
304	int priv_size, i;
305	struct wiphy *wiphy;
306
307	/* Ensure 32-byte alignment of our private data and hw private data.
308	 * We use the wiphy priv data for both our ieee80211_local and for
309	 * the driver's private data
310	 *
311	 * In memory it'll be like this:
312	 *
313	 * +-------------------------+
314	 * | struct wiphy	    |
315	 * +-------------------------+
316	 * | struct ieee80211_local  |
317	 * +-------------------------+
318	 * | driver's private data   |
319	 * +-------------------------+
320	 *
321	 */
322	priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
323
324	wiphy = wiphy_new(&mac80211_config_ops, priv_size);
325
326	if (!wiphy)
327		return NULL;
328
329	wiphy->flags |= WIPHY_FLAG_NETNS_OK |
330			WIPHY_FLAG_4ADDR_AP |
331			WIPHY_FLAG_4ADDR_STATION;
332	wiphy->privid = mac80211_wiphy_privid;
333
334	/* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
335	wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
336			       sizeof(struct cfg80211_bss);
337
338	local = wiphy_priv(wiphy);
339
340	local->hw.wiphy = wiphy;
341
342	local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
343
344	BUG_ON(!ops->tx);
345	BUG_ON(!ops->start);
346	BUG_ON(!ops->stop);
347	BUG_ON(!ops->config);
348	BUG_ON(!ops->add_interface);
349	BUG_ON(!ops->remove_interface);
350	BUG_ON(!ops->configure_filter);
351	local->ops = ops;
352
353	/* set up some defaults */
354	local->hw.queues = 1;
355	local->hw.max_rates = 1;
356	local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
357	local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
358	local->user_power_level = -1;
359
360	INIT_LIST_HEAD(&local->interfaces);
361	mutex_init(&local->iflist_mtx);
362	mutex_init(&local->scan_mtx);
363
364	spin_lock_init(&local->key_lock);
365	spin_lock_init(&local->filter_lock);
366	spin_lock_init(&local->queue_stop_reason_lock);
367
368	INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
369
370	INIT_WORK(&local->restart_work, ieee80211_restart_work);
371
372	INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
373
374	INIT_WORK(&local->dynamic_ps_enable_work,
375		  ieee80211_dynamic_ps_enable_work);
376	INIT_WORK(&local->dynamic_ps_disable_work,
377		  ieee80211_dynamic_ps_disable_work);
378	setup_timer(&local->dynamic_ps_timer,
379		    ieee80211_dynamic_ps_timer, (unsigned long) local);
380
381	sta_info_init(local);
382
383	for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
384		skb_queue_head_init(&local->pending[i]);
385	tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
386		     (unsigned long)local);
387
388	tasklet_init(&local->tasklet,
389		     ieee80211_tasklet_handler,
390		     (unsigned long) local);
391
392	skb_queue_head_init(&local->skb_queue);
393	skb_queue_head_init(&local->skb_queue_unreliable);
394
395	spin_lock_init(&local->ampdu_lock);
396
397	return local_to_hw(local);
398}
399EXPORT_SYMBOL(ieee80211_alloc_hw);
400
401int ieee80211_register_hw(struct ieee80211_hw *hw)
402{
403	struct ieee80211_local *local = hw_to_local(hw);
404	int result;
405	enum ieee80211_band band;
406	int channels, i, j, max_bitrates;
407	bool supp_ht;
408	static const u32 cipher_suites[] = {
409		WLAN_CIPHER_SUITE_WEP40,
410		WLAN_CIPHER_SUITE_WEP104,
411		WLAN_CIPHER_SUITE_TKIP,
412		WLAN_CIPHER_SUITE_CCMP,
413
414		/* keep last -- depends on hw flags! */
415		WLAN_CIPHER_SUITE_AES_CMAC
416	};
417
418	/*
419	 * generic code guarantees at least one band,
420	 * set this very early because much code assumes
421	 * that hw.conf.channel is assigned
422	 */
423	channels = 0;
424	max_bitrates = 0;
425	supp_ht = false;
426	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
427		struct ieee80211_supported_band *sband;
428
429		sband = local->hw.wiphy->bands[band];
430		if (!sband)
431			continue;
432		if (!local->oper_channel) {
433			/* init channel we're on */
434			local->hw.conf.channel =
435			local->oper_channel = &sband->channels[0];
436			local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
437		}
438		channels += sband->n_channels;
439
440		if (max_bitrates < sband->n_bitrates)
441			max_bitrates = sband->n_bitrates;
442		supp_ht = supp_ht || sband->ht_cap.ht_supported;
443	}
444
445	local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
446				      sizeof(void *) * channels, GFP_KERNEL);
447	if (!local->int_scan_req)
448		return -ENOMEM;
449
450	/* if low-level driver supports AP, we also support VLAN */
451	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
452		local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
453
454	/* mac80211 always supports monitor */
455	local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
456
457	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
458		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
459	else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
460		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
461
462	/*
463	 * Calculate scan IE length -- we need this to alloc
464	 * memory and to subtract from the driver limit. It
465	 * includes the (extended) supported rates and HT
466	 * information -- SSID is the driver's responsibility.
467	 */
468	local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
469	if (supp_ht)
470		local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
471
472	if (!local->ops->hw_scan) {
473		/* For hw_scan, driver needs to set these up. */
474		local->hw.wiphy->max_scan_ssids = 4;
475		local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
476	}
477
478	/*
479	 * If the driver supports any scan IEs, then assume the
480	 * limit includes the IEs mac80211 will add, otherwise
481	 * leave it at zero and let the driver sort it out; we
482	 * still pass our IEs to the driver but userspace will
483	 * not be allowed to in that case.
484	 */
485	if (local->hw.wiphy->max_scan_ie_len)
486		local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
487
488	local->hw.wiphy->cipher_suites = cipher_suites;
489	local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
490	if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
491		local->hw.wiphy->n_cipher_suites--;
492
493	result = wiphy_register(local->hw.wiphy);
494	if (result < 0)
495		goto fail_wiphy_register;
496
497	/*
498	 * We use the number of queues for feature tests (QoS, HT) internally
499	 * so restrict them appropriately.
500	 */
501	if (hw->queues > IEEE80211_MAX_QUEUES)
502		hw->queues = IEEE80211_MAX_QUEUES;
503
504	local->workqueue =
505		create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
506	if (!local->workqueue) {
507		result = -ENOMEM;
508		goto fail_workqueue;
509	}
510
511	/*
512	 * The hardware needs headroom for sending the frame,
513	 * and we need some headroom for passing the frame to monitor
514	 * interfaces, but never both at the same time.
515	 */
516	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
517				   sizeof(struct ieee80211_tx_status_rtap_hdr));
518
519	debugfs_hw_add(local);
520
521	if (local->hw.max_listen_interval == 0)
522		local->hw.max_listen_interval = 1;
523
524	local->hw.conf.listen_interval = local->hw.max_listen_interval;
525
526	result = sta_info_start(local);
527	if (result < 0)
528		goto fail_sta_info;
529
530	result = ieee80211_wep_init(local);
531	if (result < 0) {
532		printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
533		       wiphy_name(local->hw.wiphy), result);
534		goto fail_wep;
535	}
536
537	rtnl_lock();
538
539	result = ieee80211_init_rate_ctrl_alg(local,
540					      hw->rate_control_algorithm);
541	if (result < 0) {
542		printk(KERN_DEBUG "%s: Failed to initialize rate control "
543		       "algorithm\n", wiphy_name(local->hw.wiphy));
544		goto fail_rate;
545	}
546
547	/* add one default STA interface if supported */
548	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
549		result = ieee80211_if_add(local, "wlan%d", NULL,
550					  NL80211_IFTYPE_STATION, NULL);
551		if (result)
552			printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
553			       wiphy_name(local->hw.wiphy));
554	}
555
556	rtnl_unlock();
557
558	ieee80211_led_init(local);
559
560	/* alloc internal scan request */
561	i = 0;
562	local->int_scan_req->ssids = &local->scan_ssid;
563	local->int_scan_req->n_ssids = 1;
564	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
565		if (!hw->wiphy->bands[band])
566			continue;
567		for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
568			local->int_scan_req->channels[i] =
569				&hw->wiphy->bands[band]->channels[j];
570			i++;
571		}
572	}
573	local->int_scan_req->n_channels = i;
574
575	local->network_latency_notifier.notifier_call =
576		ieee80211_max_network_latency;
577	result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
578				     &local->network_latency_notifier);
579
580	if (result) {
581		rtnl_lock();
582		goto fail_pm_qos;
583	}
584
585	return 0;
586
587 fail_pm_qos:
588	ieee80211_led_exit(local);
589	ieee80211_remove_interfaces(local);
590 fail_rate:
591	rtnl_unlock();
592	ieee80211_wep_free(local);
593 fail_wep:
594	sta_info_stop(local);
595 fail_sta_info:
596	destroy_workqueue(local->workqueue);
597 fail_workqueue:
598	wiphy_unregister(local->hw.wiphy);
599 fail_wiphy_register:
600	kfree(local->int_scan_req);
601	return result;
602}
603EXPORT_SYMBOL(ieee80211_register_hw);
604
605void ieee80211_unregister_hw(struct ieee80211_hw *hw)
606{
607	struct ieee80211_local *local = hw_to_local(hw);
608
609	tasklet_kill(&local->tx_pending_tasklet);
610	tasklet_kill(&local->tasklet);
611
612	pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
613			       &local->network_latency_notifier);
614
615	rtnl_lock();
616
617	/*
618	 * At this point, interface list manipulations are fine
619	 * because the driver cannot be handing us frames any
620	 * more and the tasklet is killed.
621	 */
622	ieee80211_remove_interfaces(local);
623
624	rtnl_unlock();
625
626	cancel_work_sync(&local->reconfig_filter);
627
628	ieee80211_clear_tx_pending(local);
629	sta_info_stop(local);
630	rate_control_deinitialize(local);
631
632	if (skb_queue_len(&local->skb_queue) ||
633	    skb_queue_len(&local->skb_queue_unreliable))
634		printk(KERN_WARNING "%s: skb_queue not empty\n",
635		       wiphy_name(local->hw.wiphy));
636	skb_queue_purge(&local->skb_queue);
637	skb_queue_purge(&local->skb_queue_unreliable);
638
639	destroy_workqueue(local->workqueue);
640	wiphy_unregister(local->hw.wiphy);
641	ieee80211_wep_free(local);
642	ieee80211_led_exit(local);
643	kfree(local->int_scan_req);
644}
645EXPORT_SYMBOL(ieee80211_unregister_hw);
646
647void ieee80211_free_hw(struct ieee80211_hw *hw)
648{
649	struct ieee80211_local *local = hw_to_local(hw);
650
651	mutex_destroy(&local->iflist_mtx);
652	mutex_destroy(&local->scan_mtx);
653
654	wiphy_free(local->hw.wiphy);
655}
656EXPORT_SYMBOL(ieee80211_free_hw);
657
658static int __init ieee80211_init(void)
659{
660	struct sk_buff *skb;
661	int ret;
662
663	BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
664	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
665		     IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
666
667	ret = rc80211_minstrel_init();
668	if (ret)
669		return ret;
670
671	ret = rc80211_pid_init();
672	if (ret)
673		goto err_pid;
674
675	ret = ieee80211_iface_init();
676	if (ret)
677		goto err_netdev;
678
679	return 0;
680 err_netdev:
681	rc80211_pid_exit();
682 err_pid:
683	rc80211_minstrel_exit();
684
685	return ret;
686}
687
688static void __exit ieee80211_exit(void)
689{
690	rc80211_pid_exit();
691	rc80211_minstrel_exit();
692
693	/*
694	 * For key todo, it'll be empty by now but the work
695	 * might still be scheduled.
696	 */
697	flush_scheduled_work();
698
699	if (mesh_allocated)
700		ieee80211s_stop();
701
702	ieee80211_iface_exit();
703}
704
705
706subsys_initcall(ieee80211_init);
707module_exit(ieee80211_exit);
708
709MODULE_DESCRIPTION("IEEE 802.11 subsystem");
710MODULE_LICENSE("GPL");
711