Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / net / mac80211 / main.c
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  * Copyright 2013-2014  Intel Mobile Communications GmbH
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/pm_qos.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "cfg.h"
36 #include "debugfs.h"
37
38 void ieee80211_configure_filter(struct ieee80211_local *local)
39 {
40         u64 mc;
41         unsigned int changed_flags;
42         unsigned int new_flags = 0;
43
44         if (atomic_read(&local->iff_promiscs))
45                 new_flags |= FIF_PROMISC_IN_BSS;
46
47         if (atomic_read(&local->iff_allmultis))
48                 new_flags |= FIF_ALLMULTI;
49
50         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
51             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
52                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53
54         if (local->fif_probe_req || local->probe_req_reg)
55                 new_flags |= FIF_PROBE_REQ;
56
57         if (local->fif_fcsfail)
58                 new_flags |= FIF_FCSFAIL;
59
60         if (local->fif_plcpfail)
61                 new_flags |= FIF_PLCPFAIL;
62
63         if (local->fif_control)
64                 new_flags |= FIF_CONTROL;
65
66         if (local->fif_other_bss)
67                 new_flags |= FIF_OTHER_BSS;
68
69         if (local->fif_pspoll)
70                 new_flags |= FIF_PSPOLL;
71
72         spin_lock_bh(&local->filter_lock);
73         changed_flags = local->filter_flags ^ new_flags;
74
75         mc = drv_prepare_multicast(local, &local->mc_list);
76         spin_unlock_bh(&local->filter_lock);
77
78         /* be a bit nasty */
79         new_flags |= (1<<31);
80
81         drv_configure_filter(local, changed_flags, &new_flags, mc);
82
83         WARN_ON(new_flags & (1<<31));
84
85         local->filter_flags = new_flags & ~(1<<31);
86 }
87
88 static void ieee80211_reconfig_filter(struct work_struct *work)
89 {
90         struct ieee80211_local *local =
91                 container_of(work, struct ieee80211_local, reconfig_filter);
92
93         ieee80211_configure_filter(local);
94 }
95
96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 {
98         struct ieee80211_sub_if_data *sdata;
99         struct cfg80211_chan_def chandef = {};
100         u32 changed = 0;
101         int power;
102         u32 offchannel_flag;
103
104         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105
106         if (local->scan_chandef.chan) {
107                 chandef = local->scan_chandef;
108         } else if (local->tmp_channel) {
109                 chandef.chan = local->tmp_channel;
110                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
111                 chandef.center_freq1 = chandef.chan->center_freq;
112         } else
113                 chandef = local->_oper_chandef;
114
115         WARN(!cfg80211_chandef_valid(&chandef),
116              "control:%d MHz width:%d center: %d/%d MHz",
117              chandef.chan->center_freq, chandef.width,
118              chandef.center_freq1, chandef.center_freq2);
119
120         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122         else
123                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124
125         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126
127         if (offchannel_flag ||
128             !cfg80211_chandef_identical(&local->hw.conf.chandef,
129                                         &local->_oper_chandef)) {
130                 local->hw.conf.chandef = chandef;
131                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132         }
133
134         if (!conf_is_ht(&local->hw.conf)) {
135                 /*
136                  * mac80211.h documents that this is only valid
137                  * when the channel is set to an HT type, and
138                  * that otherwise STATIC is used.
139                  */
140                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141         } else if (local->hw.conf.smps_mode != local->smps_mode) {
142                 local->hw.conf.smps_mode = local->smps_mode;
143                 changed |= IEEE80211_CONF_CHANGE_SMPS;
144         }
145
146         power = ieee80211_chandef_max_power(&chandef);
147
148         rcu_read_lock();
149         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151                         continue;
152                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153                         continue;
154                 power = min(power, sdata->vif.bss_conf.txpower);
155         }
156         rcu_read_unlock();
157
158         if (local->hw.conf.power_level != power) {
159                 changed |= IEEE80211_CONF_CHANGE_POWER;
160                 local->hw.conf.power_level = power;
161         }
162
163         return changed;
164 }
165
166 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
167 {
168         int ret = 0;
169
170         might_sleep();
171
172         if (!local->use_chanctx)
173                 changed |= ieee80211_hw_conf_chan(local);
174         else
175                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
176                              IEEE80211_CONF_CHANGE_POWER);
177
178         if (changed && local->open_count) {
179                 ret = drv_config(local, changed);
180                 /*
181                  * Goal:
182                  * HW reconfiguration should never fail, the driver has told
183                  * us what it can support so it should live up to that promise.
184                  *
185                  * Current status:
186                  * rfkill is not integrated with mac80211 and a
187                  * configuration command can thus fail if hardware rfkill
188                  * is enabled
189                  *
190                  * FIXME: integrate rfkill with mac80211 and then add this
191                  * WARN_ON() back
192                  *
193                  */
194                 /* WARN_ON(ret); */
195         }
196
197         return ret;
198 }
199
200 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
201                                       u32 changed)
202 {
203         struct ieee80211_local *local = sdata->local;
204
205         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
206                 return;
207
208         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
209 }
210
211 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
212 {
213         sdata->vif.bss_conf.use_cts_prot = false;
214         sdata->vif.bss_conf.use_short_preamble = false;
215         sdata->vif.bss_conf.use_short_slot = false;
216         return BSS_CHANGED_ERP_CTS_PROT |
217                BSS_CHANGED_ERP_PREAMBLE |
218                BSS_CHANGED_ERP_SLOT;
219 }
220
221 static void ieee80211_tasklet_handler(unsigned long data)
222 {
223         struct ieee80211_local *local = (struct ieee80211_local *) data;
224         struct sk_buff *skb;
225
226         while ((skb = skb_dequeue(&local->skb_queue)) ||
227                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
228                 switch (skb->pkt_type) {
229                 case IEEE80211_RX_MSG:
230                         /* Clear skb->pkt_type in order to not confuse kernel
231                          * netstack. */
232                         skb->pkt_type = 0;
233                         ieee80211_rx(&local->hw, skb);
234                         break;
235                 case IEEE80211_TX_STATUS_MSG:
236                         skb->pkt_type = 0;
237                         ieee80211_tx_status(&local->hw, skb);
238                         break;
239                 default:
240                         WARN(1, "mac80211: Packet is of unknown type %d\n",
241                              skb->pkt_type);
242                         dev_kfree_skb(skb);
243                         break;
244                 }
245         }
246 }
247
248 static void ieee80211_restart_work(struct work_struct *work)
249 {
250         struct ieee80211_local *local =
251                 container_of(work, struct ieee80211_local, restart_work);
252
253         /* wait for scan work complete */
254         flush_workqueue(local->workqueue);
255
256         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
257              "%s called with hardware scan in progress\n", __func__);
258
259         rtnl_lock();
260         ieee80211_scan_cancel(local);
261         ieee80211_reconfig(local);
262         rtnl_unlock();
263 }
264
265 void ieee80211_restart_hw(struct ieee80211_hw *hw)
266 {
267         struct ieee80211_local *local = hw_to_local(hw);
268
269         trace_api_restart_hw(local);
270
271         wiphy_info(hw->wiphy,
272                    "Hardware restart was requested\n");
273
274         /* use this reason, ieee80211_reconfig will unblock it */
275         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
276                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
277                                         false);
278
279         /*
280          * Stop all Rx during the reconfig. We don't want state changes
281          * or driver callbacks while this is in progress.
282          */
283         local->in_reconfig = true;
284         barrier();
285
286         schedule_work(&local->restart_work);
287 }
288 EXPORT_SYMBOL(ieee80211_restart_hw);
289
290 #ifdef CONFIG_INET
291 static int ieee80211_ifa_changed(struct notifier_block *nb,
292                                  unsigned long data, void *arg)
293 {
294         struct in_ifaddr *ifa = arg;
295         struct ieee80211_local *local =
296                 container_of(nb, struct ieee80211_local,
297                              ifa_notifier);
298         struct net_device *ndev = ifa->ifa_dev->dev;
299         struct wireless_dev *wdev = ndev->ieee80211_ptr;
300         struct in_device *idev;
301         struct ieee80211_sub_if_data *sdata;
302         struct ieee80211_bss_conf *bss_conf;
303         struct ieee80211_if_managed *ifmgd;
304         int c = 0;
305
306         /* Make sure it's our interface that got changed */
307         if (!wdev)
308                 return NOTIFY_DONE;
309
310         if (wdev->wiphy != local->hw.wiphy)
311                 return NOTIFY_DONE;
312
313         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
314         bss_conf = &sdata->vif.bss_conf;
315
316         /* ARP filtering is only supported in managed mode */
317         if (sdata->vif.type != NL80211_IFTYPE_STATION)
318                 return NOTIFY_DONE;
319
320         idev = __in_dev_get_rtnl(sdata->dev);
321         if (!idev)
322                 return NOTIFY_DONE;
323
324         ifmgd = &sdata->u.mgd;
325         sdata_lock(sdata);
326
327         /* Copy the addresses to the bss_conf list */
328         ifa = idev->ifa_list;
329         while (ifa) {
330                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
331                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
332                 ifa = ifa->ifa_next;
333                 c++;
334         }
335
336         bss_conf->arp_addr_cnt = c;
337
338         /* Configure driver only if associated (which also implies it is up) */
339         if (ifmgd->associated)
340                 ieee80211_bss_info_change_notify(sdata,
341                                                  BSS_CHANGED_ARP_FILTER);
342
343         sdata_unlock(sdata);
344
345         return NOTIFY_OK;
346 }
347 #endif
348
349 #if IS_ENABLED(CONFIG_IPV6)
350 static int ieee80211_ifa6_changed(struct notifier_block *nb,
351                                   unsigned long data, void *arg)
352 {
353         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
354         struct inet6_dev *idev = ifa->idev;
355         struct net_device *ndev = ifa->idev->dev;
356         struct ieee80211_local *local =
357                 container_of(nb, struct ieee80211_local, ifa6_notifier);
358         struct wireless_dev *wdev = ndev->ieee80211_ptr;
359         struct ieee80211_sub_if_data *sdata;
360
361         /* Make sure it's our interface that got changed */
362         if (!wdev || wdev->wiphy != local->hw.wiphy)
363                 return NOTIFY_DONE;
364
365         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366
367         /*
368          * For now only support station mode. This is mostly because
369          * doing AP would have to handle AP_VLAN in some way ...
370          */
371         if (sdata->vif.type != NL80211_IFTYPE_STATION)
372                 return NOTIFY_DONE;
373
374         drv_ipv6_addr_change(local, sdata, idev);
375
376         return NOTIFY_OK;
377 }
378 #endif
379
380 /* There isn't a lot of sense in it, but you can transmit anything you like */
381 static const struct ieee80211_txrx_stypes
382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
383         [NL80211_IFTYPE_ADHOC] = {
384                 .tx = 0xffff,
385                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
386                         BIT(IEEE80211_STYPE_AUTH >> 4) |
387                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
388                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
389         },
390         [NL80211_IFTYPE_STATION] = {
391                 .tx = 0xffff,
392                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
393                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
394         },
395         [NL80211_IFTYPE_AP] = {
396                 .tx = 0xffff,
397                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
398                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
399                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
400                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
401                         BIT(IEEE80211_STYPE_AUTH >> 4) |
402                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
403                         BIT(IEEE80211_STYPE_ACTION >> 4),
404         },
405         [NL80211_IFTYPE_AP_VLAN] = {
406                 /* copy AP */
407                 .tx = 0xffff,
408                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
409                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
410                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
411                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
412                         BIT(IEEE80211_STYPE_AUTH >> 4) |
413                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414                         BIT(IEEE80211_STYPE_ACTION >> 4),
415         },
416         [NL80211_IFTYPE_P2P_CLIENT] = {
417                 .tx = 0xffff,
418                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
419                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
420         },
421         [NL80211_IFTYPE_P2P_GO] = {
422                 .tx = 0xffff,
423                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
424                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
425                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
426                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
427                         BIT(IEEE80211_STYPE_AUTH >> 4) |
428                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
429                         BIT(IEEE80211_STYPE_ACTION >> 4),
430         },
431         [NL80211_IFTYPE_MESH_POINT] = {
432                 .tx = 0xffff,
433                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
435                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
436         },
437         [NL80211_IFTYPE_P2P_DEVICE] = {
438                 .tx = 0xffff,
439                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
440                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
441         },
442 };
443
444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
445         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
446                              IEEE80211_HT_AMPDU_PARM_DENSITY,
447
448         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
449                                 IEEE80211_HT_CAP_MAX_AMSDU |
450                                 IEEE80211_HT_CAP_SGI_20 |
451                                 IEEE80211_HT_CAP_SGI_40 |
452                                 IEEE80211_HT_CAP_LDPC_CODING |
453                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
454         .mcs = {
455                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
456                              0xff, 0xff, 0xff, 0xff, 0xff, },
457         },
458 };
459
460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
461         .vht_cap_info =
462                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
463                             IEEE80211_VHT_CAP_SHORT_GI_80 |
464                             IEEE80211_VHT_CAP_SHORT_GI_160 |
465                             IEEE80211_VHT_CAP_RXSTBC_1 |
466                             IEEE80211_VHT_CAP_RXSTBC_2 |
467                             IEEE80211_VHT_CAP_RXSTBC_3 |
468                             IEEE80211_VHT_CAP_RXSTBC_4 |
469                             IEEE80211_VHT_CAP_TXSTBC |
470                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
471                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
472                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
473                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
474                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
475         .supp_mcs = {
476                 .rx_mcs_map = cpu_to_le16(~0),
477                 .tx_mcs_map = cpu_to_le16(~0),
478         },
479 };
480
481 static const u8 extended_capabilities[] = {
482         0, 0, 0, 0, 0, 0, 0,
483         WLAN_EXT_CAPA8_OPMODE_NOTIF,
484 };
485
486 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
487                                         const struct ieee80211_ops *ops)
488 {
489         struct ieee80211_local *local;
490         int priv_size, i;
491         struct wiphy *wiphy;
492         bool use_chanctx;
493
494         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
495                     !ops->add_interface || !ops->remove_interface ||
496                     !ops->configure_filter))
497                 return NULL;
498
499         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
500                 return NULL;
501
502         /* check all or no channel context operations exist */
503         i = !!ops->add_chanctx + !!ops->remove_chanctx +
504             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
505             !!ops->unassign_vif_chanctx;
506         if (WARN_ON(i != 0 && i != 5))
507                 return NULL;
508         use_chanctx = i == 5;
509
510         /* Ensure 32-byte alignment of our private data and hw private data.
511          * We use the wiphy priv data for both our ieee80211_local and for
512          * the driver's private data
513          *
514          * In memory it'll be like this:
515          *
516          * +-------------------------+
517          * | struct wiphy           |
518          * +-------------------------+
519          * | struct ieee80211_local  |
520          * +-------------------------+
521          * | driver's private data   |
522          * +-------------------------+
523          *
524          */
525         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
526
527         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
528
529         if (!wiphy)
530                 return NULL;
531
532         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
533
534         wiphy->privid = mac80211_wiphy_privid;
535
536         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
537                         WIPHY_FLAG_4ADDR_AP |
538                         WIPHY_FLAG_4ADDR_STATION |
539                         WIPHY_FLAG_REPORTS_OBSS |
540                         WIPHY_FLAG_OFFCHAN_TX;
541
542         wiphy->extended_capabilities = extended_capabilities;
543         wiphy->extended_capabilities_mask = extended_capabilities;
544         wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
545
546         if (ops->remain_on_channel)
547                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
548
549         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
550                            NL80211_FEATURE_SAE |
551                            NL80211_FEATURE_HT_IBSS |
552                            NL80211_FEATURE_VIF_TXPOWER |
553                            NL80211_FEATURE_USERSPACE_MPM;
554
555         if (!ops->hw_scan)
556                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
557                                    NL80211_FEATURE_AP_SCAN;
558
559
560         if (!ops->set_key)
561                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
562
563         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
564
565         local = wiphy_priv(wiphy);
566
567         local->hw.wiphy = wiphy;
568
569         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
570
571         local->ops = ops;
572         local->use_chanctx = use_chanctx;
573
574         /* set up some defaults */
575         local->hw.queues = 1;
576         local->hw.max_rates = 1;
577         local->hw.max_report_rates = 0;
578         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
579         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
580         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
581         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
582         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
583         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
584                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
585                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
586         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
587                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
588         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
589         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
590         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
591         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
592         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
593
594         INIT_LIST_HEAD(&local->interfaces);
595
596         __hw_addr_init(&local->mc_list);
597
598         mutex_init(&local->iflist_mtx);
599         mutex_init(&local->mtx);
600
601         mutex_init(&local->key_mtx);
602         spin_lock_init(&local->filter_lock);
603         spin_lock_init(&local->rx_path_lock);
604         spin_lock_init(&local->queue_stop_reason_lock);
605
606         INIT_LIST_HEAD(&local->chanctx_list);
607         mutex_init(&local->chanctx_mtx);
608
609         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
610
611         INIT_WORK(&local->restart_work, ieee80211_restart_work);
612
613         INIT_WORK(&local->radar_detected_work,
614                   ieee80211_dfs_radar_detected_work);
615
616         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
617         local->smps_mode = IEEE80211_SMPS_OFF;
618
619         INIT_WORK(&local->dynamic_ps_enable_work,
620                   ieee80211_dynamic_ps_enable_work);
621         INIT_WORK(&local->dynamic_ps_disable_work,
622                   ieee80211_dynamic_ps_disable_work);
623         setup_timer(&local->dynamic_ps_timer,
624                     ieee80211_dynamic_ps_timer, (unsigned long) local);
625
626         INIT_WORK(&local->sched_scan_stopped_work,
627                   ieee80211_sched_scan_stopped_work);
628
629         spin_lock_init(&local->ack_status_lock);
630         idr_init(&local->ack_status_frames);
631
632         sta_info_init(local);
633
634         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
635                 skb_queue_head_init(&local->pending[i]);
636                 atomic_set(&local->agg_queue_stop[i], 0);
637         }
638         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
639                      (unsigned long)local);
640
641         tasklet_init(&local->tasklet,
642                      ieee80211_tasklet_handler,
643                      (unsigned long) local);
644
645         skb_queue_head_init(&local->skb_queue);
646         skb_queue_head_init(&local->skb_queue_unreliable);
647
648         ieee80211_led_names(local);
649
650         ieee80211_roc_setup(local);
651
652         return &local->hw;
653 }
654 EXPORT_SYMBOL(ieee80211_alloc_hw);
655
656 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
657 {
658         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
659                           IS_ERR(local->wep_rx_tfm));
660         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
661         const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
662         int n_suites = 0, r = 0, w = 0;
663         u32 *suites;
664         static const u32 cipher_suites[] = {
665                 /* keep WEP first, it may be removed below */
666                 WLAN_CIPHER_SUITE_WEP40,
667                 WLAN_CIPHER_SUITE_WEP104,
668                 WLAN_CIPHER_SUITE_TKIP,
669                 WLAN_CIPHER_SUITE_CCMP,
670
671                 /* keep last -- depends on hw flags! */
672                 WLAN_CIPHER_SUITE_AES_CMAC
673         };
674
675         /* Driver specifies the ciphers, we have nothing to do... */
676         if (local->hw.wiphy->cipher_suites && have_wep)
677                 return 0;
678
679         /* Set up cipher suites if driver relies on mac80211 cipher defs */
680         if (!local->hw.wiphy->cipher_suites && !cs) {
681                 local->hw.wiphy->cipher_suites = cipher_suites;
682                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
683
684                 if (!have_mfp)
685                         local->hw.wiphy->n_cipher_suites--;
686
687                 if (!have_wep) {
688                         local->hw.wiphy->cipher_suites += 2;
689                         local->hw.wiphy->n_cipher_suites -= 2;
690                 }
691
692                 return 0;
693         }
694
695         if (!local->hw.wiphy->cipher_suites) {
696                 /*
697                  * Driver specifies cipher schemes only
698                  * We start counting ciphers defined by schemes, TKIP and CCMP
699                  */
700                 n_suites = local->hw.n_cipher_schemes + 2;
701
702                 /* check if we have WEP40 and WEP104 */
703                 if (have_wep)
704                         n_suites += 2;
705
706                 /* check if we have AES_CMAC */
707                 if (have_mfp)
708                         n_suites++;
709
710                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
711                 if (!suites)
712                         return -ENOMEM;
713
714                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
715                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
716
717                 if (have_wep) {
718                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
719                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
720                 }
721
722                 if (have_mfp)
723                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
724
725                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
726                         suites[w++] = cs[r].cipher;
727         } else {
728                 /* Driver provides cipher suites, but we need to exclude WEP */
729                 suites = kmemdup(local->hw.wiphy->cipher_suites,
730                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
731                                  GFP_KERNEL);
732                 if (!suites)
733                         return -ENOMEM;
734
735                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
736                         u32 suite = local->hw.wiphy->cipher_suites[r];
737
738                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
739                             suite == WLAN_CIPHER_SUITE_WEP104)
740                                 continue;
741                         suites[w++] = suite;
742                 }
743         }
744
745         local->hw.wiphy->cipher_suites = suites;
746         local->hw.wiphy->n_cipher_suites = w;
747         local->wiphy_ciphers_allocated = true;
748
749         return 0;
750 }
751
752 int ieee80211_register_hw(struct ieee80211_hw *hw)
753 {
754         struct ieee80211_local *local = hw_to_local(hw);
755         int result, i;
756         enum ieee80211_band band;
757         int channels, max_bitrates;
758         bool supp_ht, supp_vht;
759         netdev_features_t feature_whitelist;
760         struct cfg80211_chan_def dflt_chandef = {};
761
762         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
763             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
764              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
765                 return -EINVAL;
766
767 #ifdef CONFIG_PM
768         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
769                 return -EINVAL;
770 #endif
771
772         if (!local->use_chanctx) {
773                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
774                         const struct ieee80211_iface_combination *comb;
775
776                         comb = &local->hw.wiphy->iface_combinations[i];
777
778                         if (comb->num_different_channels > 1)
779                                 return -EINVAL;
780                 }
781         } else {
782                 /*
783                  * WDS is currently prohibited when channel contexts are used
784                  * because there's no clear definition of which channel WDS
785                  * type interfaces use
786                  */
787                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
788                         return -EINVAL;
789
790                 /* DFS currently not supported with channel context drivers */
791                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
792                         const struct ieee80211_iface_combination *comb;
793
794                         comb = &local->hw.wiphy->iface_combinations[i];
795
796                         if (comb->radar_detect_widths)
797                                 return -EINVAL;
798                 }
799         }
800
801         /* Only HW csum features are currently compatible with mac80211 */
802         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
803                             NETIF_F_HW_CSUM;
804         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
805                 return -EINVAL;
806
807         if (hw->max_report_rates == 0)
808                 hw->max_report_rates = hw->max_rates;
809
810         local->rx_chains = 1;
811
812         /*
813          * generic code guarantees at least one band,
814          * set this very early because much code assumes
815          * that hw.conf.channel is assigned
816          */
817         channels = 0;
818         max_bitrates = 0;
819         supp_ht = false;
820         supp_vht = false;
821         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
822                 struct ieee80211_supported_band *sband;
823
824                 sband = local->hw.wiphy->bands[band];
825                 if (!sband)
826                         continue;
827
828                 if (!dflt_chandef.chan) {
829                         cfg80211_chandef_create(&dflt_chandef,
830                                                 &sband->channels[0],
831                                                 NL80211_CHAN_NO_HT);
832                         /* init channel we're on */
833                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
834                                 local->hw.conf.chandef = dflt_chandef;
835                                 local->_oper_chandef = dflt_chandef;
836                         }
837                         local->monitor_chandef = dflt_chandef;
838                 }
839
840                 channels += sband->n_channels;
841
842                 if (max_bitrates < sband->n_bitrates)
843                         max_bitrates = sband->n_bitrates;
844                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
845                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
846
847                 if (sband->ht_cap.ht_supported)
848                         local->rx_chains =
849                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
850                                     local->rx_chains);
851
852                 /* TODO: consider VHT for RX chains, hopefully it's the same */
853         }
854
855         /* if low-level driver supports AP, we also support VLAN */
856         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
857                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
858                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
859         }
860
861         /* mac80211 always supports monitor */
862         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
863         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
864
865         /* mac80211 doesn't support more than one IBSS interface right now */
866         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
867                 const struct ieee80211_iface_combination *c;
868                 int j;
869
870                 c = &hw->wiphy->iface_combinations[i];
871
872                 for (j = 0; j < c->n_limits; j++)
873                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
874                             c->limits[j].max > 1)
875                                 return -EINVAL;
876         }
877
878         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
879                                       sizeof(void *) * channels, GFP_KERNEL);
880         if (!local->int_scan_req)
881                 return -ENOMEM;
882
883         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
884                 if (!local->hw.wiphy->bands[band])
885                         continue;
886                 local->int_scan_req->rates[band] = (u32) -1;
887         }
888
889 #ifndef CONFIG_MAC80211_MESH
890         /* mesh depends on Kconfig, but drivers should set it if they want */
891         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
892 #endif
893
894         /* if the underlying driver supports mesh, mac80211 will (at least)
895          * provide routing of mesh authentication frames to userspace */
896         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
897                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
898
899         /* mac80211 supports control port protocol changing */
900         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
901
902         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
903                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
904         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
905                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
906                 if (hw->max_signal <= 0) {
907                         result = -EINVAL;
908                         goto fail_wiphy_register;
909                 }
910         }
911
912         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
913              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
914              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
915
916         /*
917          * Calculate scan IE length -- we need this to alloc
918          * memory and to subtract from the driver limit. It
919          * includes the DS Params, (extended) supported rates, and HT
920          * information -- SSID is the driver's responsibility.
921          */
922         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
923                 3 /* DS Params */;
924         if (supp_ht)
925                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
926
927         if (supp_vht)
928                 local->scan_ies_len +=
929                         2 + sizeof(struct ieee80211_vht_cap);
930
931         if (!local->ops->hw_scan) {
932                 /* For hw_scan, driver needs to set these up. */
933                 local->hw.wiphy->max_scan_ssids = 4;
934                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
935         }
936
937         /*
938          * If the driver supports any scan IEs, then assume the
939          * limit includes the IEs mac80211 will add, otherwise
940          * leave it at zero and let the driver sort it out; we
941          * still pass our IEs to the driver but userspace will
942          * not be allowed to in that case.
943          */
944         if (local->hw.wiphy->max_scan_ie_len)
945                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
946
947         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
948                                          local->hw.n_cipher_schemes));
949
950         result = ieee80211_init_cipher_suites(local);
951         if (result < 0)
952                 goto fail_wiphy_register;
953
954         if (!local->ops->remain_on_channel)
955                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
956
957         /* mac80211 based drivers don't support internal TDLS setup */
958         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
959                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
960
961         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
962
963         result = wiphy_register(local->hw.wiphy);
964         if (result < 0)
965                 goto fail_wiphy_register;
966
967         /*
968          * We use the number of queues for feature tests (QoS, HT) internally
969          * so restrict them appropriately.
970          */
971         if (hw->queues > IEEE80211_MAX_QUEUES)
972                 hw->queues = IEEE80211_MAX_QUEUES;
973
974         local->workqueue =
975                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
976         if (!local->workqueue) {
977                 result = -ENOMEM;
978                 goto fail_workqueue;
979         }
980
981         /*
982          * The hardware needs headroom for sending the frame,
983          * and we need some headroom for passing the frame to monitor
984          * interfaces, but never both at the same time.
985          */
986         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
987                                    IEEE80211_TX_STATUS_HEADROOM);
988
989         debugfs_hw_add(local);
990
991         /*
992          * if the driver doesn't specify a max listen interval we
993          * use 5 which should be a safe default
994          */
995         if (local->hw.max_listen_interval == 0)
996                 local->hw.max_listen_interval = 5;
997
998         local->hw.conf.listen_interval = local->hw.max_listen_interval;
999
1000         local->dynamic_ps_forced_timeout = -1;
1001
1002         result = ieee80211_wep_init(local);
1003         if (result < 0)
1004                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1005                             result);
1006
1007         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1008
1009         ieee80211_led_init(local);
1010
1011         rtnl_lock();
1012
1013         result = ieee80211_init_rate_ctrl_alg(local,
1014                                               hw->rate_control_algorithm);
1015         if (result < 0) {
1016                 wiphy_debug(local->hw.wiphy,
1017                             "Failed to initialize rate control algorithm\n");
1018                 goto fail_rate;
1019         }
1020
1021         /* add one default STA interface if supported */
1022         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1023                 result = ieee80211_if_add(local, "wlan%d", NULL,
1024                                           NL80211_IFTYPE_STATION, NULL);
1025                 if (result)
1026                         wiphy_warn(local->hw.wiphy,
1027                                    "Failed to add default virtual iface\n");
1028         }
1029
1030         rtnl_unlock();
1031
1032         local->network_latency_notifier.notifier_call =
1033                 ieee80211_max_network_latency;
1034         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1035                                      &local->network_latency_notifier);
1036         if (result) {
1037                 rtnl_lock();
1038                 goto fail_pm_qos;
1039         }
1040
1041 #ifdef CONFIG_INET
1042         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1043         result = register_inetaddr_notifier(&local->ifa_notifier);
1044         if (result)
1045                 goto fail_ifa;
1046 #endif
1047
1048 #if IS_ENABLED(CONFIG_IPV6)
1049         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1050         result = register_inet6addr_notifier(&local->ifa6_notifier);
1051         if (result)
1052                 goto fail_ifa6;
1053 #endif
1054
1055         return 0;
1056
1057 #if IS_ENABLED(CONFIG_IPV6)
1058  fail_ifa6:
1059 #ifdef CONFIG_INET
1060         unregister_inetaddr_notifier(&local->ifa_notifier);
1061 #endif
1062 #endif
1063 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1064  fail_ifa:
1065         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1066                                &local->network_latency_notifier);
1067         rtnl_lock();
1068 #endif
1069  fail_pm_qos:
1070         ieee80211_led_exit(local);
1071         ieee80211_remove_interfaces(local);
1072  fail_rate:
1073         rtnl_unlock();
1074         ieee80211_wep_free(local);
1075         sta_info_stop(local);
1076         destroy_workqueue(local->workqueue);
1077  fail_workqueue:
1078         wiphy_unregister(local->hw.wiphy);
1079  fail_wiphy_register:
1080         if (local->wiphy_ciphers_allocated)
1081                 kfree(local->hw.wiphy->cipher_suites);
1082         kfree(local->int_scan_req);
1083         return result;
1084 }
1085 EXPORT_SYMBOL(ieee80211_register_hw);
1086
1087 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1088                         struct net_device *napi_dev,
1089                         int (*poll)(struct napi_struct *, int),
1090                         int weight)
1091 {
1092         struct ieee80211_local *local = hw_to_local(hw);
1093
1094         netif_napi_add(napi_dev, napi, poll, weight);
1095         local->napi = napi;
1096 }
1097 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1098
1099 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1100 {
1101         struct ieee80211_local *local = hw_to_local(hw);
1102
1103         tasklet_kill(&local->tx_pending_tasklet);
1104         tasklet_kill(&local->tasklet);
1105
1106         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1107                                &local->network_latency_notifier);
1108 #ifdef CONFIG_INET
1109         unregister_inetaddr_notifier(&local->ifa_notifier);
1110 #endif
1111 #if IS_ENABLED(CONFIG_IPV6)
1112         unregister_inet6addr_notifier(&local->ifa6_notifier);
1113 #endif
1114
1115         rtnl_lock();
1116
1117         /*
1118          * At this point, interface list manipulations are fine
1119          * because the driver cannot be handing us frames any
1120          * more and the tasklet is killed.
1121          */
1122         ieee80211_remove_interfaces(local);
1123
1124         rtnl_unlock();
1125
1126         cancel_work_sync(&local->restart_work);
1127         cancel_work_sync(&local->reconfig_filter);
1128         flush_work(&local->sched_scan_stopped_work);
1129
1130         ieee80211_clear_tx_pending(local);
1131         rate_control_deinitialize(local);
1132
1133         if (skb_queue_len(&local->skb_queue) ||
1134             skb_queue_len(&local->skb_queue_unreliable))
1135                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1136         skb_queue_purge(&local->skb_queue);
1137         skb_queue_purge(&local->skb_queue_unreliable);
1138
1139         destroy_workqueue(local->workqueue);
1140         wiphy_unregister(local->hw.wiphy);
1141         sta_info_stop(local);
1142         ieee80211_wep_free(local);
1143         ieee80211_led_exit(local);
1144         kfree(local->int_scan_req);
1145 }
1146 EXPORT_SYMBOL(ieee80211_unregister_hw);
1147
1148 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1149 {
1150         WARN_ONCE(1, "Have pending ack frames!\n");
1151         kfree_skb(p);
1152         return 0;
1153 }
1154
1155 void ieee80211_free_hw(struct ieee80211_hw *hw)
1156 {
1157         struct ieee80211_local *local = hw_to_local(hw);
1158
1159         mutex_destroy(&local->iflist_mtx);
1160         mutex_destroy(&local->mtx);
1161
1162         if (local->wiphy_ciphers_allocated)
1163                 kfree(local->hw.wiphy->cipher_suites);
1164
1165         idr_for_each(&local->ack_status_frames,
1166                      ieee80211_free_ack_frame, NULL);
1167         idr_destroy(&local->ack_status_frames);
1168
1169         kfree(rcu_access_pointer(local->tx_latency));
1170
1171         wiphy_free(local->hw.wiphy);
1172 }
1173 EXPORT_SYMBOL(ieee80211_free_hw);
1174
1175 static int __init ieee80211_init(void)
1176 {
1177         struct sk_buff *skb;
1178         int ret;
1179
1180         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1181         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1182                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1183
1184         ret = rc80211_minstrel_init();
1185         if (ret)
1186                 return ret;
1187
1188         ret = rc80211_minstrel_ht_init();
1189         if (ret)
1190                 goto err_minstrel;
1191
1192         ret = ieee80211_iface_init();
1193         if (ret)
1194                 goto err_netdev;
1195
1196         return 0;
1197  err_netdev:
1198         rc80211_minstrel_ht_exit();
1199  err_minstrel:
1200         rc80211_minstrel_exit();
1201
1202         return ret;
1203 }
1204
1205 static void __exit ieee80211_exit(void)
1206 {
1207         rc80211_minstrel_ht_exit();
1208         rc80211_minstrel_exit();
1209
1210         ieee80211s_stop();
1211
1212         ieee80211_iface_exit();
1213
1214         rcu_barrier();
1215 }
1216
1217
1218 subsys_initcall(ieee80211_init);
1219 module_exit(ieee80211_exit);
1220
1221 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1222 MODULE_LICENSE("GPL");