2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 * DOC: Wireless regulatory infrastructure
24 * The usual implementation is for a driver to read a device EEPROM to
25 * determine which regulatory domain it should be operating under, then
26 * looking up the allowable channels in a driver-local table and finally
27 * registering those channels in the wiphy structure.
29 * Another set of compliance enforcement is for drivers to use their
30 * own compliance limits which can be stored on the EEPROM. The host
31 * driver or firmware may ensure these are used.
33 * In addition to all this we provide an extra layer of regulatory
34 * conformance. For drivers which do not have any regulatory
35 * information CRDA provides the complete regulatory solution.
36 * For others it provides a community effort on further restrictions
37 * to enhance compliance.
39 * Note: When number of rules --> infinity we will not be able to
40 * index on alpha2 any more, instead we'll probably have to
41 * rely on some SHA1 checksum of the regdomain for example.
45 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47 #include <linux/kernel.h>
48 #include <linux/export.h>
49 #include <linux/slab.h>
50 #include <linux/list.h>
51 #include <linux/random.h>
52 #include <linux/ctype.h>
53 #include <linux/nl80211.h>
54 #include <linux/platform_device.h>
55 #include <linux/moduleparam.h>
56 #include <net/cfg80211.h>
62 #ifdef CONFIG_CFG80211_REG_DEBUG
63 #define REG_DBG_PRINT(format, args...) \
64 printk(KERN_DEBUG pr_fmt(format), ##args)
66 #define REG_DBG_PRINT(args...)
69 static struct regulatory_request core_request_world = {
70 .initiator = NL80211_REGDOM_SET_BY_CORE,
75 .country_ie_env = ENVIRON_ANY,
78 /* Receipt of information from last regulatory request */
79 static struct regulatory_request *last_request = &core_request_world;
81 /* To trigger userspace events */
82 static struct platform_device *reg_pdev;
84 static struct device_type reg_device_type = {
85 .uevent = reg_device_uevent,
89 * Central wireless core regulatory domains, we only need two,
90 * the current one and a world regulatory domain in case we have no
91 * information to give us an alpha2
93 const struct ieee80211_regdomain *cfg80211_regdomain;
96 * Protects static reg.c components:
97 * - cfg80211_world_regdom
100 * - reg_num_devs_support_basehint
102 static DEFINE_MUTEX(reg_mutex);
105 * Number of devices that registered to the core
106 * that support cellular base station regulatory hints
108 static int reg_num_devs_support_basehint;
110 static inline void assert_reg_lock(void)
112 lockdep_assert_held(®_mutex);
115 /* Used to queue up regulatory hints */
116 static LIST_HEAD(reg_requests_list);
117 static spinlock_t reg_requests_lock;
119 /* Used to queue up beacon hints for review */
120 static LIST_HEAD(reg_pending_beacons);
121 static spinlock_t reg_pending_beacons_lock;
123 /* Used to keep track of processed beacon hints */
124 static LIST_HEAD(reg_beacon_list);
127 struct list_head list;
128 struct ieee80211_channel chan;
131 static void reg_todo(struct work_struct *work);
132 static DECLARE_WORK(reg_work, reg_todo);
134 static void reg_timeout_work(struct work_struct *work);
135 static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
137 /* We keep a static world regulatory domain in case of the absence of CRDA */
138 static const struct ieee80211_regdomain world_regdom = {
142 /* IEEE 802.11b/g, channels 1..11 */
143 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
144 /* IEEE 802.11b/g, channels 12..13. No HT40
145 * channel fits here. */
146 REG_RULE(2467-10, 2472+10, 20, 6, 20,
147 NL80211_RRF_PASSIVE_SCAN |
148 NL80211_RRF_NO_IBSS),
149 /* IEEE 802.11 channel 14 - Only JP enables
150 * this and for 802.11b only */
151 REG_RULE(2484-10, 2484+10, 20, 6, 20,
152 NL80211_RRF_PASSIVE_SCAN |
153 NL80211_RRF_NO_IBSS |
154 NL80211_RRF_NO_OFDM),
155 /* IEEE 802.11a, channel 36..48 */
156 REG_RULE(5180-10, 5240+10, 40, 6, 20,
157 NL80211_RRF_PASSIVE_SCAN |
158 NL80211_RRF_NO_IBSS),
160 /* NB: 5260 MHz - 5700 MHz requies DFS */
162 /* IEEE 802.11a, channel 149..165 */
163 REG_RULE(5745-10, 5825+10, 40, 6, 20,
164 NL80211_RRF_PASSIVE_SCAN |
165 NL80211_RRF_NO_IBSS),
167 /* IEEE 802.11ad (60gHz), channels 1..3 */
168 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
172 static const struct ieee80211_regdomain *cfg80211_world_regdom =
175 static char *ieee80211_regdom = "00";
176 static char user_alpha2[2];
178 module_param(ieee80211_regdom, charp, 0444);
179 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
181 static void reset_regdomains(bool full_reset)
183 /* avoid freeing static information or freeing something twice */
184 if (cfg80211_regdomain == cfg80211_world_regdom)
185 cfg80211_regdomain = NULL;
186 if (cfg80211_world_regdom == &world_regdom)
187 cfg80211_world_regdom = NULL;
188 if (cfg80211_regdomain == &world_regdom)
189 cfg80211_regdomain = NULL;
191 kfree(cfg80211_regdomain);
192 kfree(cfg80211_world_regdom);
194 cfg80211_world_regdom = &world_regdom;
195 cfg80211_regdomain = NULL;
200 if (last_request != &core_request_world)
202 last_request = &core_request_world;
206 * Dynamic world regulatory domain requested by the wireless
207 * core upon initialization
209 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
211 BUG_ON(!last_request);
213 reset_regdomains(false);
215 cfg80211_world_regdom = rd;
216 cfg80211_regdomain = rd;
219 bool is_world_regdom(const char *alpha2)
223 if (alpha2[0] == '0' && alpha2[1] == '0')
228 static bool is_alpha2_set(const char *alpha2)
232 if (alpha2[0] != 0 && alpha2[1] != 0)
237 static bool is_unknown_alpha2(const char *alpha2)
242 * Special case where regulatory domain was built by driver
243 * but a specific alpha2 cannot be determined
245 if (alpha2[0] == '9' && alpha2[1] == '9')
250 static bool is_intersected_alpha2(const char *alpha2)
255 * Special case where regulatory domain is the
256 * result of an intersection between two regulatory domain
259 if (alpha2[0] == '9' && alpha2[1] == '8')
264 static bool is_an_alpha2(const char *alpha2)
268 if (isalpha(alpha2[0]) && isalpha(alpha2[1]))
273 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
275 if (!alpha2_x || !alpha2_y)
277 if (alpha2_x[0] == alpha2_y[0] &&
278 alpha2_x[1] == alpha2_y[1])
283 static bool regdom_changes(const char *alpha2)
285 assert_cfg80211_lock();
287 if (!cfg80211_regdomain)
289 if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
295 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
296 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
297 * has ever been issued.
299 static bool is_user_regdom_saved(void)
301 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
304 /* This would indicate a mistake on the design */
305 if (WARN((!is_world_regdom(user_alpha2) &&
306 !is_an_alpha2(user_alpha2)),
307 "Unexpected user alpha2: %c%c\n",
315 static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
316 const struct ieee80211_regdomain *src_regd)
318 struct ieee80211_regdomain *regd;
319 int size_of_regd = 0;
322 size_of_regd = sizeof(struct ieee80211_regdomain) +
323 ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
325 regd = kzalloc(size_of_regd, GFP_KERNEL);
329 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
331 for (i = 0; i < src_regd->n_reg_rules; i++)
332 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
333 sizeof(struct ieee80211_reg_rule));
339 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
340 struct reg_regdb_search_request {
342 struct list_head list;
345 static LIST_HEAD(reg_regdb_search_list);
346 static DEFINE_MUTEX(reg_regdb_search_mutex);
348 static void reg_regdb_search(struct work_struct *work)
350 struct reg_regdb_search_request *request;
351 const struct ieee80211_regdomain *curdom, *regdom;
353 bool set_reg = false;
355 mutex_lock(&cfg80211_mutex);
357 mutex_lock(®_regdb_search_mutex);
358 while (!list_empty(®_regdb_search_list)) {
359 request = list_first_entry(®_regdb_search_list,
360 struct reg_regdb_search_request,
362 list_del(&request->list);
364 for (i=0; i<reg_regdb_size; i++) {
365 curdom = reg_regdb[i];
367 if (!memcmp(request->alpha2, curdom->alpha2, 2)) {
368 r = reg_copy_regd(®dom, curdom);
378 mutex_unlock(®_regdb_search_mutex);
383 mutex_unlock(&cfg80211_mutex);
386 static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
388 static void reg_regdb_query(const char *alpha2)
390 struct reg_regdb_search_request *request;
395 request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
399 memcpy(request->alpha2, alpha2, 2);
401 mutex_lock(®_regdb_search_mutex);
402 list_add_tail(&request->list, ®_regdb_search_list);
403 mutex_unlock(®_regdb_search_mutex);
405 schedule_work(®_regdb_work);
408 /* Feel free to add any other sanity checks here */
409 static void reg_regdb_size_check(void)
411 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
412 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
415 static inline void reg_regdb_size_check(void) {}
416 static inline void reg_regdb_query(const char *alpha2) {}
417 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
420 * This lets us keep regulatory code which is updated on a regulatory
421 * basis in userspace. Country information is filled in by
424 static int call_crda(const char *alpha2)
426 if (!is_world_regdom((char *) alpha2))
427 pr_info("Calling CRDA for country: %c%c\n",
428 alpha2[0], alpha2[1]);
430 pr_info("Calling CRDA to update world regulatory domain\n");
432 /* query internal regulatory database (if it exists) */
433 reg_regdb_query(alpha2);
435 return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE);
438 /* Used by nl80211 before kmalloc'ing our regulatory domain */
439 bool reg_is_valid_request(const char *alpha2)
441 assert_cfg80211_lock();
446 return alpha2_equal(last_request->alpha2, alpha2);
449 /* Sanity check on a regulatory rule */
450 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
452 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
455 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
458 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
461 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
463 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
464 freq_range->max_bandwidth_khz > freq_diff)
470 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
472 const struct ieee80211_reg_rule *reg_rule = NULL;
475 if (!rd->n_reg_rules)
478 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
481 for (i = 0; i < rd->n_reg_rules; i++) {
482 reg_rule = &rd->reg_rules[i];
483 if (!is_valid_reg_rule(reg_rule))
490 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
494 u32 start_freq_khz, end_freq_khz;
496 start_freq_khz = center_freq_khz - (bw_khz/2);
497 end_freq_khz = center_freq_khz + (bw_khz/2);
499 if (start_freq_khz >= freq_range->start_freq_khz &&
500 end_freq_khz <= freq_range->end_freq_khz)
507 * freq_in_rule_band - tells us if a frequency is in a frequency band
508 * @freq_range: frequency rule we want to query
509 * @freq_khz: frequency we are inquiring about
511 * This lets us know if a specific frequency rule is or is not relevant to
512 * a specific frequency's band. Bands are device specific and artificial
513 * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is
514 * safe for now to assume that a frequency rule should not be part of a
515 * frequency's band if the start freq or end freq are off by more than 2 GHz.
516 * This resolution can be lowered and should be considered as we add
517 * regulatory rule support for other "bands".
519 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
522 #define ONE_GHZ_IN_KHZ 1000000
523 if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
525 if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
528 #undef ONE_GHZ_IN_KHZ
532 * Helper for regdom_intersect(), this does the real
533 * mathematical intersection fun
535 static int reg_rules_intersect(
536 const struct ieee80211_reg_rule *rule1,
537 const struct ieee80211_reg_rule *rule2,
538 struct ieee80211_reg_rule *intersected_rule)
540 const struct ieee80211_freq_range *freq_range1, *freq_range2;
541 struct ieee80211_freq_range *freq_range;
542 const struct ieee80211_power_rule *power_rule1, *power_rule2;
543 struct ieee80211_power_rule *power_rule;
546 freq_range1 = &rule1->freq_range;
547 freq_range2 = &rule2->freq_range;
548 freq_range = &intersected_rule->freq_range;
550 power_rule1 = &rule1->power_rule;
551 power_rule2 = &rule2->power_rule;
552 power_rule = &intersected_rule->power_rule;
554 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
555 freq_range2->start_freq_khz);
556 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
557 freq_range2->end_freq_khz);
558 freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
559 freq_range2->max_bandwidth_khz);
561 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
562 if (freq_range->max_bandwidth_khz > freq_diff)
563 freq_range->max_bandwidth_khz = freq_diff;
565 power_rule->max_eirp = min(power_rule1->max_eirp,
566 power_rule2->max_eirp);
567 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
568 power_rule2->max_antenna_gain);
570 intersected_rule->flags = (rule1->flags | rule2->flags);
572 if (!is_valid_reg_rule(intersected_rule))
579 * regdom_intersect - do the intersection between two regulatory domains
580 * @rd1: first regulatory domain
581 * @rd2: second regulatory domain
583 * Use this function to get the intersection between two regulatory domains.
584 * Once completed we will mark the alpha2 for the rd as intersected, "98",
585 * as no one single alpha2 can represent this regulatory domain.
587 * Returns a pointer to the regulatory domain structure which will hold the
588 * resulting intersection of rules between rd1 and rd2. We will
589 * kzalloc() this structure for you.
591 static struct ieee80211_regdomain *regdom_intersect(
592 const struct ieee80211_regdomain *rd1,
593 const struct ieee80211_regdomain *rd2)
597 unsigned int num_rules = 0, rule_idx = 0;
598 const struct ieee80211_reg_rule *rule1, *rule2;
599 struct ieee80211_reg_rule *intersected_rule;
600 struct ieee80211_regdomain *rd;
601 /* This is just a dummy holder to help us count */
602 struct ieee80211_reg_rule irule;
604 /* Uses the stack temporarily for counter arithmetic */
605 intersected_rule = &irule;
607 memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
613 * First we get a count of the rules we'll need, then we actually
614 * build them. This is to so we can malloc() and free() a
615 * regdomain once. The reason we use reg_rules_intersect() here
616 * is it will return -EINVAL if the rule computed makes no sense.
617 * All rules that do check out OK are valid.
620 for (x = 0; x < rd1->n_reg_rules; x++) {
621 rule1 = &rd1->reg_rules[x];
622 for (y = 0; y < rd2->n_reg_rules; y++) {
623 rule2 = &rd2->reg_rules[y];
624 if (!reg_rules_intersect(rule1, rule2,
627 memset(intersected_rule, 0,
628 sizeof(struct ieee80211_reg_rule));
635 size_of_regd = sizeof(struct ieee80211_regdomain) +
636 ((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
638 rd = kzalloc(size_of_regd, GFP_KERNEL);
642 for (x = 0; x < rd1->n_reg_rules; x++) {
643 rule1 = &rd1->reg_rules[x];
644 for (y = 0; y < rd2->n_reg_rules; y++) {
645 rule2 = &rd2->reg_rules[y];
647 * This time around instead of using the stack lets
648 * write to the target rule directly saving ourselves
651 intersected_rule = &rd->reg_rules[rule_idx];
652 r = reg_rules_intersect(rule1, rule2,
655 * No need to memset here the intersected rule here as
656 * we're not using the stack anymore
664 if (rule_idx != num_rules) {
669 rd->n_reg_rules = num_rules;
677 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
678 * want to just have the channel structure use these
680 static u32 map_regdom_flags(u32 rd_flags)
682 u32 channel_flags = 0;
683 if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
684 channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
685 if (rd_flags & NL80211_RRF_NO_IBSS)
686 channel_flags |= IEEE80211_CHAN_NO_IBSS;
687 if (rd_flags & NL80211_RRF_DFS)
688 channel_flags |= IEEE80211_CHAN_RADAR;
689 if (rd_flags & NL80211_RRF_NO_OFDM)
690 channel_flags |= IEEE80211_CHAN_NO_OFDM;
691 return channel_flags;
694 static int freq_reg_info_regd(struct wiphy *wiphy,
697 const struct ieee80211_reg_rule **reg_rule,
698 const struct ieee80211_regdomain *custom_regd)
701 bool band_rule_found = false;
702 const struct ieee80211_regdomain *regd;
703 bool bw_fits = false;
706 desired_bw_khz = MHZ_TO_KHZ(20);
708 regd = custom_regd ? custom_regd : cfg80211_regdomain;
711 * Follow the driver's regulatory domain, if present, unless a country
712 * IE has been processed or a user wants to help complaince further
715 last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
716 last_request->initiator != NL80211_REGDOM_SET_BY_USER &&
723 for (i = 0; i < regd->n_reg_rules; i++) {
724 const struct ieee80211_reg_rule *rr;
725 const struct ieee80211_freq_range *fr = NULL;
727 rr = ®d->reg_rules[i];
728 fr = &rr->freq_range;
731 * We only need to know if one frequency rule was
732 * was in center_freq's band, that's enough, so lets
733 * not overwrite it once found
735 if (!band_rule_found)
736 band_rule_found = freq_in_rule_band(fr, center_freq);
738 bw_fits = reg_does_bw_fit(fr,
742 if (band_rule_found && bw_fits) {
748 if (!band_rule_found)
754 int freq_reg_info(struct wiphy *wiphy,
757 const struct ieee80211_reg_rule **reg_rule)
759 assert_cfg80211_lock();
760 return freq_reg_info_regd(wiphy,
766 EXPORT_SYMBOL(freq_reg_info);
768 #ifdef CONFIG_CFG80211_REG_DEBUG
769 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
772 case NL80211_REGDOM_SET_BY_CORE:
773 return "Set by core";
774 case NL80211_REGDOM_SET_BY_USER:
775 return "Set by user";
776 case NL80211_REGDOM_SET_BY_DRIVER:
777 return "Set by driver";
778 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
779 return "Set by country IE";
786 static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
788 const struct ieee80211_reg_rule *reg_rule)
790 const struct ieee80211_power_rule *power_rule;
791 const struct ieee80211_freq_range *freq_range;
792 char max_antenna_gain[32];
794 power_rule = ®_rule->power_rule;
795 freq_range = ®_rule->freq_range;
797 if (!power_rule->max_antenna_gain)
798 snprintf(max_antenna_gain, 32, "N/A");
800 snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain);
802 REG_DBG_PRINT("Updating information on frequency %d MHz "
803 "for a %d MHz width channel with regulatory rule:\n",
805 KHZ_TO_MHZ(desired_bw_khz));
807 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
808 freq_range->start_freq_khz,
809 freq_range->end_freq_khz,
810 freq_range->max_bandwidth_khz,
812 power_rule->max_eirp);
815 static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
817 const struct ieee80211_reg_rule *reg_rule)
824 * Note that right now we assume the desired channel bandwidth
825 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
826 * per channel, the primary and the extension channel). To support
827 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
828 * new ieee80211_channel.target_bw and re run the regulatory check
829 * on the wiphy with the target_bw specified. Then we can simply use
830 * that below for the desired_bw_khz below.
832 static void handle_channel(struct wiphy *wiphy,
833 enum nl80211_reg_initiator initiator,
834 enum ieee80211_band band,
835 unsigned int chan_idx)
838 u32 flags, bw_flags = 0;
839 u32 desired_bw_khz = MHZ_TO_KHZ(20);
840 const struct ieee80211_reg_rule *reg_rule = NULL;
841 const struct ieee80211_power_rule *power_rule = NULL;
842 const struct ieee80211_freq_range *freq_range = NULL;
843 struct ieee80211_supported_band *sband;
844 struct ieee80211_channel *chan;
845 struct wiphy *request_wiphy = NULL;
847 assert_cfg80211_lock();
849 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
851 sband = wiphy->bands[band];
852 BUG_ON(chan_idx >= sband->n_channels);
853 chan = &sband->channels[chan_idx];
855 flags = chan->orig_flags;
857 r = freq_reg_info(wiphy,
858 MHZ_TO_KHZ(chan->center_freq),
864 * We will disable all channels that do not match our
865 * received regulatory rule unless the hint is coming
866 * from a Country IE and the Country IE had no information
867 * about a band. The IEEE 802.11 spec allows for an AP
868 * to send only a subset of the regulatory rules allowed,
869 * so an AP in the US that only supports 2.4 GHz may only send
870 * a country IE with information for the 2.4 GHz band
871 * while 5 GHz is still supported.
873 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
877 REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq);
878 chan->flags = IEEE80211_CHAN_DISABLED;
882 chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
884 power_rule = ®_rule->power_rule;
885 freq_range = ®_rule->freq_range;
887 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
888 bw_flags = IEEE80211_CHAN_NO_HT40;
890 if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
891 request_wiphy && request_wiphy == wiphy &&
892 request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
894 * This guarantees the driver's requested regulatory domain
895 * will always be used as a base for further regulatory
898 chan->flags = chan->orig_flags =
899 map_regdom_flags(reg_rule->flags) | bw_flags;
900 chan->max_antenna_gain = chan->orig_mag =
901 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
902 chan->max_power = chan->orig_mpwr =
903 (int) MBM_TO_DBM(power_rule->max_eirp);
907 chan->beacon_found = false;
908 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
909 chan->max_antenna_gain = min(chan->orig_mag,
910 (int) MBI_TO_DBI(power_rule->max_antenna_gain));
911 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
912 if (chan->orig_mpwr) {
914 * Devices that have their own custom regulatory domain
915 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
916 * passed country IE power settings.
918 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
919 wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY &&
920 wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY)
921 chan->max_power = chan->max_reg_power;
923 chan->max_power = min(chan->orig_mpwr,
924 chan->max_reg_power);
926 chan->max_power = chan->max_reg_power;
929 static void handle_band(struct wiphy *wiphy,
930 enum ieee80211_band band,
931 enum nl80211_reg_initiator initiator)
934 struct ieee80211_supported_band *sband;
936 BUG_ON(!wiphy->bands[band]);
937 sband = wiphy->bands[band];
939 for (i = 0; i < sband->n_channels; i++)
940 handle_channel(wiphy, initiator, band, i);
943 static bool reg_request_cell_base(struct regulatory_request *request)
945 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
947 if (request->user_reg_hint_type != NL80211_USER_REG_HINT_CELL_BASE)
952 bool reg_last_request_cell_base(void)
955 assert_cfg80211_lock();
957 mutex_lock(®_mutex);
958 val = reg_request_cell_base(last_request);
959 mutex_unlock(®_mutex);
963 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
965 /* Core specific check */
966 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
968 if (!reg_num_devs_support_basehint)
971 if (reg_request_cell_base(last_request)) {
972 if (!regdom_changes(pending_request->alpha2))
979 /* Device specific check */
980 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
982 if (!(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS))
987 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
991 static int reg_dev_ignore_cell_hint(struct wiphy *wiphy)
998 static bool ignore_reg_update(struct wiphy *wiphy,
999 enum nl80211_reg_initiator initiator)
1001 if (!last_request) {
1002 REG_DBG_PRINT("Ignoring regulatory request %s since "
1003 "last_request is not set\n",
1004 reg_initiator_name(initiator));
1008 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1009 wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
1010 REG_DBG_PRINT("Ignoring regulatory request %s "
1011 "since the driver uses its own custom "
1012 "regulatory domain\n",
1013 reg_initiator_name(initiator));
1018 * wiphy->regd will be set once the device has its own
1019 * desired regulatory domain set
1021 if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd &&
1022 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1023 !is_world_regdom(last_request->alpha2)) {
1024 REG_DBG_PRINT("Ignoring regulatory request %s "
1025 "since the driver requires its own regulatory "
1026 "domain to be set first\n",
1027 reg_initiator_name(initiator));
1031 if (reg_request_cell_base(last_request))
1032 return reg_dev_ignore_cell_hint(wiphy);
1037 static void handle_reg_beacon(struct wiphy *wiphy,
1038 unsigned int chan_idx,
1039 struct reg_beacon *reg_beacon)
1041 struct ieee80211_supported_band *sband;
1042 struct ieee80211_channel *chan;
1043 bool channel_changed = false;
1044 struct ieee80211_channel chan_before;
1046 assert_cfg80211_lock();
1048 sband = wiphy->bands[reg_beacon->chan.band];
1049 chan = &sband->channels[chan_idx];
1051 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1054 if (chan->beacon_found)
1057 chan->beacon_found = true;
1059 if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS)
1062 chan_before.center_freq = chan->center_freq;
1063 chan_before.flags = chan->flags;
1065 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) {
1066 chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
1067 channel_changed = true;
1070 if (chan->flags & IEEE80211_CHAN_NO_IBSS) {
1071 chan->flags &= ~IEEE80211_CHAN_NO_IBSS;
1072 channel_changed = true;
1075 if (channel_changed)
1076 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1080 * Called when a scan on a wiphy finds a beacon on
1083 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1084 struct reg_beacon *reg_beacon)
1087 struct ieee80211_supported_band *sband;
1089 assert_cfg80211_lock();
1091 if (!wiphy->bands[reg_beacon->chan.band])
1094 sband = wiphy->bands[reg_beacon->chan.band];
1096 for (i = 0; i < sband->n_channels; i++)
1097 handle_reg_beacon(wiphy, i, reg_beacon);
1101 * Called upon reg changes or a new wiphy is added
1103 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1106 struct ieee80211_supported_band *sband;
1107 struct reg_beacon *reg_beacon;
1109 assert_cfg80211_lock();
1111 if (list_empty(®_beacon_list))
1114 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1115 if (!wiphy->bands[reg_beacon->chan.band])
1117 sband = wiphy->bands[reg_beacon->chan.band];
1118 for (i = 0; i < sband->n_channels; i++)
1119 handle_reg_beacon(wiphy, i, reg_beacon);
1123 static bool reg_is_world_roaming(struct wiphy *wiphy)
1125 if (is_world_regdom(cfg80211_regdomain->alpha2) ||
1126 (wiphy->regd && is_world_regdom(wiphy->regd->alpha2)))
1129 last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1130 wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)
1135 /* Reap the advantages of previously found beacons */
1136 static void reg_process_beacons(struct wiphy *wiphy)
1139 * Means we are just firing up cfg80211, so no beacons would
1140 * have been processed yet.
1144 if (!reg_is_world_roaming(wiphy))
1146 wiphy_update_beacon_reg(wiphy);
1149 static bool is_ht40_not_allowed(struct ieee80211_channel *chan)
1153 if (chan->flags & IEEE80211_CHAN_DISABLED)
1155 /* This would happen when regulatory rules disallow HT40 completely */
1156 if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40)))
1161 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1162 enum ieee80211_band band,
1163 unsigned int chan_idx)
1165 struct ieee80211_supported_band *sband;
1166 struct ieee80211_channel *channel;
1167 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1170 assert_cfg80211_lock();
1172 sband = wiphy->bands[band];
1173 BUG_ON(chan_idx >= sband->n_channels);
1174 channel = &sband->channels[chan_idx];
1176 if (is_ht40_not_allowed(channel)) {
1177 channel->flags |= IEEE80211_CHAN_NO_HT40;
1182 * We need to ensure the extension channels exist to
1183 * be able to use HT40- or HT40+, this finds them (or not)
1185 for (i = 0; i < sband->n_channels; i++) {
1186 struct ieee80211_channel *c = &sband->channels[i];
1187 if (c->center_freq == (channel->center_freq - 20))
1189 if (c->center_freq == (channel->center_freq + 20))
1194 * Please note that this assumes target bandwidth is 20 MHz,
1195 * if that ever changes we also need to change the below logic
1196 * to include that as well.
1198 if (is_ht40_not_allowed(channel_before))
1199 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1201 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1203 if (is_ht40_not_allowed(channel_after))
1204 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1206 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1209 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1210 enum ieee80211_band band)
1213 struct ieee80211_supported_band *sband;
1215 BUG_ON(!wiphy->bands[band]);
1216 sband = wiphy->bands[band];
1218 for (i = 0; i < sband->n_channels; i++)
1219 reg_process_ht_flags_channel(wiphy, band, i);
1222 static void reg_process_ht_flags(struct wiphy *wiphy)
1224 enum ieee80211_band band;
1229 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1230 if (wiphy->bands[band])
1231 reg_process_ht_flags_band(wiphy, band);
1236 static void wiphy_update_regulatory(struct wiphy *wiphy,
1237 enum nl80211_reg_initiator initiator)
1239 enum ieee80211_band band;
1243 if (ignore_reg_update(wiphy, initiator))
1246 last_request->dfs_region = cfg80211_regdomain->dfs_region;
1248 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1249 if (wiphy->bands[band])
1250 handle_band(wiphy, band, initiator);
1253 reg_process_beacons(wiphy);
1254 reg_process_ht_flags(wiphy);
1255 if (wiphy->reg_notifier)
1256 wiphy->reg_notifier(wiphy, last_request);
1259 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1261 struct cfg80211_registered_device *rdev;
1262 struct wiphy *wiphy;
1264 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1265 wiphy = &rdev->wiphy;
1266 wiphy_update_regulatory(wiphy, initiator);
1268 * Regulatory updates set by CORE are ignored for custom
1269 * regulatory cards. Let us notify the changes to the driver,
1270 * as some drivers used this to restore its orig_* reg domain.
1272 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1273 wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY &&
1274 wiphy->reg_notifier)
1275 wiphy->reg_notifier(wiphy, last_request);
1279 static void handle_channel_custom(struct wiphy *wiphy,
1280 enum ieee80211_band band,
1281 unsigned int chan_idx,
1282 const struct ieee80211_regdomain *regd)
1285 u32 desired_bw_khz = MHZ_TO_KHZ(20);
1287 const struct ieee80211_reg_rule *reg_rule = NULL;
1288 const struct ieee80211_power_rule *power_rule = NULL;
1289 const struct ieee80211_freq_range *freq_range = NULL;
1290 struct ieee80211_supported_band *sband;
1291 struct ieee80211_channel *chan;
1295 sband = wiphy->bands[band];
1296 BUG_ON(chan_idx >= sband->n_channels);
1297 chan = &sband->channels[chan_idx];
1299 r = freq_reg_info_regd(wiphy,
1300 MHZ_TO_KHZ(chan->center_freq),
1306 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1307 "regd has no rule that fits a %d MHz "
1310 KHZ_TO_MHZ(desired_bw_khz));
1311 chan->flags = IEEE80211_CHAN_DISABLED;
1315 chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
1317 power_rule = ®_rule->power_rule;
1318 freq_range = ®_rule->freq_range;
1320 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
1321 bw_flags = IEEE80211_CHAN_NO_HT40;
1323 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1324 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1325 chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1328 static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,
1329 const struct ieee80211_regdomain *regd)
1332 struct ieee80211_supported_band *sband;
1334 BUG_ON(!wiphy->bands[band]);
1335 sband = wiphy->bands[band];
1337 for (i = 0; i < sband->n_channels; i++)
1338 handle_channel_custom(wiphy, band, i, regd);
1341 /* Used by drivers prior to wiphy registration */
1342 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1343 const struct ieee80211_regdomain *regd)
1345 enum ieee80211_band band;
1346 unsigned int bands_set = 0;
1348 mutex_lock(®_mutex);
1349 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1350 if (!wiphy->bands[band])
1352 handle_band_custom(wiphy, band, regd);
1355 mutex_unlock(®_mutex);
1358 * no point in calling this if it won't have any effect
1359 * on your device's supportd bands.
1361 WARN_ON(!bands_set);
1363 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1366 * Return value which can be used by ignore_request() to indicate
1367 * it has been determined we should intersect two regulatory domains
1369 #define REG_INTERSECT 1
1371 /* This has the logic which determines when a new request
1372 * should be ignored. */
1373 static int ignore_request(struct wiphy *wiphy,
1374 struct regulatory_request *pending_request)
1376 struct wiphy *last_wiphy = NULL;
1378 assert_cfg80211_lock();
1380 /* All initial requests are respected */
1384 switch (pending_request->initiator) {
1385 case NL80211_REGDOM_SET_BY_CORE:
1387 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1389 if (reg_request_cell_base(last_request)) {
1390 /* Trust a Cell base station over the AP's country IE */
1391 if (regdom_changes(pending_request->alpha2))
1396 last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
1398 if (unlikely(!is_an_alpha2(pending_request->alpha2)))
1400 if (last_request->initiator ==
1401 NL80211_REGDOM_SET_BY_COUNTRY_IE) {
1402 if (last_wiphy != wiphy) {
1404 * Two cards with two APs claiming different
1405 * Country IE alpha2s. We could
1406 * intersect them, but that seems unlikely
1407 * to be correct. Reject second one for now.
1409 if (regdom_changes(pending_request->alpha2))
1414 * Two consecutive Country IE hints on the same wiphy.
1415 * This should be picked up early by the driver/stack
1417 if (WARN_ON(regdom_changes(pending_request->alpha2)))
1422 case NL80211_REGDOM_SET_BY_DRIVER:
1423 if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) {
1424 if (regdom_changes(pending_request->alpha2))
1430 * This would happen if you unplug and plug your card
1431 * back in or if you add a new device for which the previously
1432 * loaded card also agrees on the regulatory domain.
1434 if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1435 !regdom_changes(pending_request->alpha2))
1438 return REG_INTERSECT;
1439 case NL80211_REGDOM_SET_BY_USER:
1440 if (reg_request_cell_base(pending_request))
1441 return reg_ignore_cell_hint(pending_request);
1443 if (reg_request_cell_base(last_request))
1446 if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1447 return REG_INTERSECT;
1449 * If the user knows better the user should set the regdom
1450 * to their country before the IE is picked up
1452 if (last_request->initiator == NL80211_REGDOM_SET_BY_USER &&
1453 last_request->intersect)
1456 * Process user requests only after previous user/driver/core
1457 * requests have been processed
1459 if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE ||
1460 last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1461 last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
1462 if (regdom_changes(last_request->alpha2))
1466 if (!regdom_changes(pending_request->alpha2))
1475 static void reg_set_request_processed(void)
1477 bool need_more_processing = false;
1479 last_request->processed = true;
1481 spin_lock(®_requests_lock);
1482 if (!list_empty(®_requests_list))
1483 need_more_processing = true;
1484 spin_unlock(®_requests_lock);
1486 if (last_request->initiator == NL80211_REGDOM_SET_BY_USER)
1487 cancel_delayed_work(®_timeout);
1489 if (need_more_processing)
1490 schedule_work(®_work);
1494 * __regulatory_hint - hint to the wireless core a regulatory domain
1495 * @wiphy: if the hint comes from country information from an AP, this
1496 * is required to be set to the wiphy that received the information
1497 * @pending_request: the regulatory request currently being processed
1499 * The Wireless subsystem can use this function to hint to the wireless core
1500 * what it believes should be the current regulatory domain.
1502 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1503 * already been set or other standard error codes.
1505 * Caller must hold &cfg80211_mutex and ®_mutex
1507 static int __regulatory_hint(struct wiphy *wiphy,
1508 struct regulatory_request *pending_request)
1510 bool intersect = false;
1513 assert_cfg80211_lock();
1515 r = ignore_request(wiphy, pending_request);
1517 if (r == REG_INTERSECT) {
1518 if (pending_request->initiator ==
1519 NL80211_REGDOM_SET_BY_DRIVER) {
1520 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
1522 kfree(pending_request);
1529 * If the regulatory domain being requested by the
1530 * driver has already been set just copy it to the
1533 if (r == -EALREADY &&
1534 pending_request->initiator ==
1535 NL80211_REGDOM_SET_BY_DRIVER) {
1536 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
1538 kfree(pending_request);
1544 kfree(pending_request);
1549 if (last_request != &core_request_world)
1550 kfree(last_request);
1552 last_request = pending_request;
1553 last_request->intersect = intersect;
1555 pending_request = NULL;
1557 if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
1558 user_alpha2[0] = last_request->alpha2[0];
1559 user_alpha2[1] = last_request->alpha2[1];
1562 /* When r == REG_INTERSECT we do need to call CRDA */
1565 * Since CRDA will not be called in this case as we already
1566 * have applied the requested regulatory domain before we just
1567 * inform userspace we have processed the request
1569 if (r == -EALREADY) {
1570 nl80211_send_reg_change_event(last_request);
1571 reg_set_request_processed();
1576 return call_crda(last_request->alpha2);
1579 /* This processes *all* regulatory hints */
1580 static void reg_process_hint(struct regulatory_request *reg_request,
1581 enum nl80211_reg_initiator reg_initiator)
1584 struct wiphy *wiphy = NULL;
1586 BUG_ON(!reg_request->alpha2);
1588 if (wiphy_idx_valid(reg_request->wiphy_idx))
1589 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
1591 if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1597 r = __regulatory_hint(wiphy, reg_request);
1598 /* This is required so that the orig_* parameters are saved */
1599 if (r == -EALREADY && wiphy &&
1600 wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
1601 wiphy_update_regulatory(wiphy, reg_initiator);
1606 * We only time out user hints, given that they should be the only
1607 * source of bogus requests.
1609 if (r != -EALREADY &&
1610 reg_initiator == NL80211_REGDOM_SET_BY_USER)
1611 schedule_delayed_work(®_timeout, msecs_to_jiffies(3142));
1615 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1616 * Regulatory hints come on a first come first serve basis and we
1617 * must process each one atomically.
1619 static void reg_process_pending_hints(void)
1621 struct regulatory_request *reg_request;
1623 mutex_lock(&cfg80211_mutex);
1624 mutex_lock(®_mutex);
1626 /* When last_request->processed becomes true this will be rescheduled */
1627 if (last_request && !last_request->processed) {
1628 REG_DBG_PRINT("Pending regulatory request, waiting "
1629 "for it to be processed...\n");
1633 spin_lock(®_requests_lock);
1635 if (list_empty(®_requests_list)) {
1636 spin_unlock(®_requests_lock);
1640 reg_request = list_first_entry(®_requests_list,
1641 struct regulatory_request,
1643 list_del_init(®_request->list);
1645 spin_unlock(®_requests_lock);
1647 reg_process_hint(reg_request, reg_request->initiator);
1650 mutex_unlock(®_mutex);
1651 mutex_unlock(&cfg80211_mutex);
1654 /* Processes beacon hints -- this has nothing to do with country IEs */
1655 static void reg_process_pending_beacon_hints(void)
1657 struct cfg80211_registered_device *rdev;
1658 struct reg_beacon *pending_beacon, *tmp;
1661 * No need to hold the reg_mutex here as we just touch wiphys
1662 * and do not read or access regulatory variables.
1664 mutex_lock(&cfg80211_mutex);
1666 /* This goes through the _pending_ beacon list */
1667 spin_lock_bh(®_pending_beacons_lock);
1669 if (list_empty(®_pending_beacons)) {
1670 spin_unlock_bh(®_pending_beacons_lock);
1674 list_for_each_entry_safe(pending_beacon, tmp,
1675 ®_pending_beacons, list) {
1677 list_del_init(&pending_beacon->list);
1679 /* Applies the beacon hint to current wiphys */
1680 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1681 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
1683 /* Remembers the beacon hint for new wiphys or reg changes */
1684 list_add_tail(&pending_beacon->list, ®_beacon_list);
1687 spin_unlock_bh(®_pending_beacons_lock);
1689 mutex_unlock(&cfg80211_mutex);
1692 static void reg_todo(struct work_struct *work)
1694 reg_process_pending_hints();
1695 reg_process_pending_beacon_hints();
1698 static void queue_regulatory_request(struct regulatory_request *request)
1700 if (isalpha(request->alpha2[0]))
1701 request->alpha2[0] = toupper(request->alpha2[0]);
1702 if (isalpha(request->alpha2[1]))
1703 request->alpha2[1] = toupper(request->alpha2[1]);
1705 spin_lock(®_requests_lock);
1706 list_add_tail(&request->list, ®_requests_list);
1707 spin_unlock(®_requests_lock);
1709 schedule_work(®_work);
1713 * Core regulatory hint -- happens during cfg80211_init()
1714 * and when we restore regulatory settings.
1716 static int regulatory_hint_core(const char *alpha2)
1718 struct regulatory_request *request;
1720 request = kzalloc(sizeof(struct regulatory_request),
1725 request->alpha2[0] = alpha2[0];
1726 request->alpha2[1] = alpha2[1];
1727 request->initiator = NL80211_REGDOM_SET_BY_CORE;
1729 queue_regulatory_request(request);
1735 int regulatory_hint_user(const char *alpha2,
1736 enum nl80211_user_reg_hint_type user_reg_hint_type)
1738 struct regulatory_request *request;
1742 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1746 request->wiphy_idx = WIPHY_IDX_STALE;
1747 request->alpha2[0] = alpha2[0];
1748 request->alpha2[1] = alpha2[1];
1749 request->initiator = NL80211_REGDOM_SET_BY_USER;
1750 request->user_reg_hint_type = user_reg_hint_type;
1752 queue_regulatory_request(request);
1758 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
1760 struct regulatory_request *request;
1765 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1769 request->wiphy_idx = get_wiphy_idx(wiphy);
1771 /* Must have registered wiphy first */
1772 BUG_ON(!wiphy_idx_valid(request->wiphy_idx));
1774 request->alpha2[0] = alpha2[0];
1775 request->alpha2[1] = alpha2[1];
1776 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
1778 queue_regulatory_request(request);
1782 EXPORT_SYMBOL(regulatory_hint);
1785 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1786 * therefore cannot iterate over the rdev list here.
1788 void regulatory_hint_11d(struct wiphy *wiphy,
1789 enum ieee80211_band band,
1794 enum environment_cap env = ENVIRON_ANY;
1795 struct regulatory_request *request;
1797 mutex_lock(®_mutex);
1799 if (unlikely(!last_request))
1802 /* IE len must be evenly divisible by 2 */
1803 if (country_ie_len & 0x01)
1806 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1809 alpha2[0] = country_ie[0];
1810 alpha2[1] = country_ie[1];
1812 if (country_ie[2] == 'I')
1813 env = ENVIRON_INDOOR;
1814 else if (country_ie[2] == 'O')
1815 env = ENVIRON_OUTDOOR;
1818 * We will run this only upon a successful connection on cfg80211.
1819 * We leave conflict resolution to the workqueue, where can hold
1822 if (likely(last_request->initiator ==
1823 NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1824 wiphy_idx_valid(last_request->wiphy_idx)))
1827 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1831 request->wiphy_idx = get_wiphy_idx(wiphy);
1832 request->alpha2[0] = alpha2[0];
1833 request->alpha2[1] = alpha2[1];
1834 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
1835 request->country_ie_env = env;
1837 mutex_unlock(®_mutex);
1839 queue_regulatory_request(request);
1844 mutex_unlock(®_mutex);
1847 static void restore_alpha2(char *alpha2, bool reset_user)
1849 /* indicates there is no alpha2 to consider for restoration */
1853 /* The user setting has precedence over the module parameter */
1854 if (is_user_regdom_saved()) {
1855 /* Unless we're asked to ignore it and reset it */
1857 REG_DBG_PRINT("Restoring regulatory settings "
1858 "including user preference\n");
1859 user_alpha2[0] = '9';
1860 user_alpha2[1] = '7';
1863 * If we're ignoring user settings, we still need to
1864 * check the module parameter to ensure we put things
1865 * back as they were for a full restore.
1867 if (!is_world_regdom(ieee80211_regdom)) {
1868 REG_DBG_PRINT("Keeping preference on "
1869 "module parameter ieee80211_regdom: %c%c\n",
1870 ieee80211_regdom[0],
1871 ieee80211_regdom[1]);
1872 alpha2[0] = ieee80211_regdom[0];
1873 alpha2[1] = ieee80211_regdom[1];
1876 REG_DBG_PRINT("Restoring regulatory settings "
1877 "while preserving user preference for: %c%c\n",
1880 alpha2[0] = user_alpha2[0];
1881 alpha2[1] = user_alpha2[1];
1883 } else if (!is_world_regdom(ieee80211_regdom)) {
1884 REG_DBG_PRINT("Keeping preference on "
1885 "module parameter ieee80211_regdom: %c%c\n",
1886 ieee80211_regdom[0],
1887 ieee80211_regdom[1]);
1888 alpha2[0] = ieee80211_regdom[0];
1889 alpha2[1] = ieee80211_regdom[1];
1891 REG_DBG_PRINT("Restoring regulatory settings\n");
1894 static void restore_custom_reg_settings(struct wiphy *wiphy)
1896 struct ieee80211_supported_band *sband;
1897 enum ieee80211_band band;
1898 struct ieee80211_channel *chan;
1901 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1902 sband = wiphy->bands[band];
1905 for (i = 0; i < sband->n_channels; i++) {
1906 chan = &sband->channels[i];
1907 chan->flags = chan->orig_flags;
1908 chan->max_antenna_gain = chan->orig_mag;
1909 chan->max_power = chan->orig_mpwr;
1910 chan->beacon_found = false;
1916 * Restoring regulatory settings involves ingoring any
1917 * possibly stale country IE information and user regulatory
1918 * settings if so desired, this includes any beacon hints
1919 * learned as we could have traveled outside to another country
1920 * after disconnection. To restore regulatory settings we do
1921 * exactly what we did at bootup:
1923 * - send a core regulatory hint
1924 * - send a user regulatory hint if applicable
1926 * Device drivers that send a regulatory hint for a specific country
1927 * keep their own regulatory domain on wiphy->regd so that does does
1928 * not need to be remembered.
1930 static void restore_regulatory_settings(bool reset_user)
1933 char world_alpha2[2];
1934 struct reg_beacon *reg_beacon, *btmp;
1935 struct regulatory_request *reg_request, *tmp;
1936 LIST_HEAD(tmp_reg_req_list);
1937 struct cfg80211_registered_device *rdev;
1939 mutex_lock(&cfg80211_mutex);
1940 mutex_lock(®_mutex);
1942 reset_regdomains(true);
1943 restore_alpha2(alpha2, reset_user);
1946 * If there's any pending requests we simply
1947 * stash them to a temporary pending queue and
1948 * add then after we've restored regulatory
1951 spin_lock(®_requests_lock);
1952 if (!list_empty(®_requests_list)) {
1953 list_for_each_entry_safe(reg_request, tmp,
1954 ®_requests_list, list) {
1955 if (reg_request->initiator !=
1956 NL80211_REGDOM_SET_BY_USER)
1958 list_del(®_request->list);
1959 list_add_tail(®_request->list, &tmp_reg_req_list);
1962 spin_unlock(®_requests_lock);
1964 /* Clear beacon hints */
1965 spin_lock_bh(®_pending_beacons_lock);
1966 if (!list_empty(®_pending_beacons)) {
1967 list_for_each_entry_safe(reg_beacon, btmp,
1968 ®_pending_beacons, list) {
1969 list_del(®_beacon->list);
1973 spin_unlock_bh(®_pending_beacons_lock);
1975 if (!list_empty(®_beacon_list)) {
1976 list_for_each_entry_safe(reg_beacon, btmp,
1977 ®_beacon_list, list) {
1978 list_del(®_beacon->list);
1983 /* First restore to the basic regulatory settings */
1984 cfg80211_regdomain = cfg80211_world_regdom;
1985 world_alpha2[0] = cfg80211_regdomain->alpha2[0];
1986 world_alpha2[1] = cfg80211_regdomain->alpha2[1];
1988 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1989 if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY)
1990 restore_custom_reg_settings(&rdev->wiphy);
1993 mutex_unlock(®_mutex);
1994 mutex_unlock(&cfg80211_mutex);
1996 regulatory_hint_core(world_alpha2);
1999 * This restores the ieee80211_regdom module parameter
2000 * preference or the last user requested regulatory
2001 * settings, user regulatory settings takes precedence.
2003 if (is_an_alpha2(alpha2))
2004 regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER);
2006 if (list_empty(&tmp_reg_req_list))
2009 mutex_lock(&cfg80211_mutex);
2010 mutex_lock(®_mutex);
2012 spin_lock(®_requests_lock);
2013 list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) {
2014 REG_DBG_PRINT("Adding request for country %c%c back "
2016 reg_request->alpha2[0],
2017 reg_request->alpha2[1]);
2018 list_del(®_request->list);
2019 list_add_tail(®_request->list, ®_requests_list);
2021 spin_unlock(®_requests_lock);
2023 mutex_unlock(®_mutex);
2024 mutex_unlock(&cfg80211_mutex);
2026 REG_DBG_PRINT("Kicking the queue\n");
2028 schedule_work(®_work);
2031 void regulatory_hint_disconnect(void)
2033 REG_DBG_PRINT("All devices are disconnected, going to "
2034 "restore regulatory settings\n");
2035 restore_regulatory_settings(false);
2038 static bool freq_is_chan_12_13_14(u16 freq)
2040 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2041 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2042 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
2047 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2048 struct ieee80211_channel *beacon_chan,
2051 struct reg_beacon *reg_beacon;
2053 if (likely((beacon_chan->beacon_found ||
2054 (beacon_chan->flags & IEEE80211_CHAN_RADAR) ||
2055 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
2056 !freq_is_chan_12_13_14(beacon_chan->center_freq)))))
2059 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2063 REG_DBG_PRINT("Found new beacon on "
2064 "frequency: %d MHz (Ch %d) on %s\n",
2065 beacon_chan->center_freq,
2066 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2069 memcpy(®_beacon->chan, beacon_chan,
2070 sizeof(struct ieee80211_channel));
2074 * Since we can be called from BH or and non-BH context
2075 * we must use spin_lock_bh()
2077 spin_lock_bh(®_pending_beacons_lock);
2078 list_add_tail(®_beacon->list, ®_pending_beacons);
2079 spin_unlock_bh(®_pending_beacons_lock);
2081 schedule_work(®_work);
2086 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2089 const struct ieee80211_reg_rule *reg_rule = NULL;
2090 const struct ieee80211_freq_range *freq_range = NULL;
2091 const struct ieee80211_power_rule *power_rule = NULL;
2093 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2095 for (i = 0; i < rd->n_reg_rules; i++) {
2096 reg_rule = &rd->reg_rules[i];
2097 freq_range = ®_rule->freq_range;
2098 power_rule = ®_rule->power_rule;
2101 * There may not be documentation for max antenna gain
2102 * in certain regions
2104 if (power_rule->max_antenna_gain)
2105 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2106 freq_range->start_freq_khz,
2107 freq_range->end_freq_khz,
2108 freq_range->max_bandwidth_khz,
2109 power_rule->max_antenna_gain,
2110 power_rule->max_eirp);
2112 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2113 freq_range->start_freq_khz,
2114 freq_range->end_freq_khz,
2115 freq_range->max_bandwidth_khz,
2116 power_rule->max_eirp);
2120 bool reg_supported_dfs_region(u8 dfs_region)
2122 switch (dfs_region) {
2123 case NL80211_DFS_UNSET:
2124 case NL80211_DFS_FCC:
2125 case NL80211_DFS_ETSI:
2126 case NL80211_DFS_JP:
2129 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2135 static void print_dfs_region(u8 dfs_region)
2140 switch (dfs_region) {
2141 case NL80211_DFS_FCC:
2142 pr_info(" DFS Master region FCC");
2144 case NL80211_DFS_ETSI:
2145 pr_info(" DFS Master region ETSI");
2147 case NL80211_DFS_JP:
2148 pr_info(" DFS Master region JP");
2151 pr_info(" DFS Master region Uknown");
2156 static void print_regdomain(const struct ieee80211_regdomain *rd)
2159 if (is_intersected_alpha2(rd->alpha2)) {
2161 if (last_request->initiator ==
2162 NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2163 struct cfg80211_registered_device *rdev;
2164 rdev = cfg80211_rdev_by_wiphy_idx(
2165 last_request->wiphy_idx);
2167 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2168 rdev->country_ie_alpha2[0],
2169 rdev->country_ie_alpha2[1]);
2171 pr_info("Current regulatory domain intersected:\n");
2173 pr_info("Current regulatory domain intersected:\n");
2174 } else if (is_world_regdom(rd->alpha2))
2175 pr_info("World regulatory domain updated:\n");
2177 if (is_unknown_alpha2(rd->alpha2))
2178 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2180 if (reg_request_cell_base(last_request))
2181 pr_info("Regulatory domain changed "
2182 "to country: %c%c by Cell Station\n",
2183 rd->alpha2[0], rd->alpha2[1]);
2185 pr_info("Regulatory domain changed "
2186 "to country: %c%c\n",
2187 rd->alpha2[0], rd->alpha2[1]);
2190 print_dfs_region(rd->dfs_region);
2194 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2196 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2200 /* Takes ownership of rd only if it doesn't fail */
2201 static int __set_regdom(const struct ieee80211_regdomain *rd)
2203 const struct ieee80211_regdomain *intersected_rd = NULL;
2204 struct cfg80211_registered_device *rdev = NULL;
2205 struct wiphy *request_wiphy;
2206 /* Some basic sanity checks first */
2208 if (is_world_regdom(rd->alpha2)) {
2209 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
2211 update_world_regdomain(rd);
2215 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2216 !is_unknown_alpha2(rd->alpha2))
2223 * Lets only bother proceeding on the same alpha2 if the current
2224 * rd is non static (it means CRDA was present and was used last)
2225 * and the pending request came in from a country IE
2227 if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2229 * If someone else asked us to change the rd lets only bother
2230 * checking if the alpha2 changes if CRDA was already called
2232 if (!regdom_changes(rd->alpha2))
2237 * Now lets set the regulatory domain, update all driver channels
2238 * and finally inform them of what we have done, in case they want
2239 * to review or adjust their own settings based on their own
2240 * internal EEPROM data
2243 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
2246 if (!is_valid_rd(rd)) {
2247 pr_err("Invalid regulatory domain detected:\n");
2248 print_regdomain_info(rd);
2252 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
2253 if (!request_wiphy &&
2254 (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2255 last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) {
2256 schedule_delayed_work(®_timeout, 0);
2260 if (!last_request->intersect) {
2263 if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) {
2264 reset_regdomains(false);
2265 cfg80211_regdomain = rd;
2270 * For a driver hint, lets copy the regulatory domain the
2271 * driver wanted to the wiphy to deal with conflicts
2275 * Userspace could have sent two replies with only
2276 * one kernel request.
2278 if (request_wiphy->regd)
2281 r = reg_copy_regd(&request_wiphy->regd, rd);
2285 reset_regdomains(false);
2286 cfg80211_regdomain = rd;
2290 /* Intersection requires a bit more work */
2292 if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2294 intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
2295 if (!intersected_rd)
2299 * We can trash what CRDA provided now.
2300 * However if a driver requested this specific regulatory
2301 * domain we keep it for its private use
2303 if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER)
2304 request_wiphy->regd = rd;
2310 reset_regdomains(false);
2311 cfg80211_regdomain = intersected_rd;
2316 if (!intersected_rd)
2319 rdev = wiphy_to_dev(request_wiphy);
2321 rdev->country_ie_alpha2[0] = rd->alpha2[0];
2322 rdev->country_ie_alpha2[1] = rd->alpha2[1];
2323 rdev->env = last_request->country_ie_env;
2325 BUG_ON(intersected_rd == rd);
2330 reset_regdomains(false);
2331 cfg80211_regdomain = intersected_rd;
2338 * Use this call to set the current regulatory domain. Conflicts with
2339 * multiple drivers can be ironed out later. Caller must've already
2340 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2342 int set_regdom(const struct ieee80211_regdomain *rd)
2346 assert_cfg80211_lock();
2348 mutex_lock(®_mutex);
2350 /* Note that this doesn't update the wiphys, this is done below */
2351 r = __set_regdom(rd);
2354 reg_set_request_processed();
2357 mutex_unlock(®_mutex);
2361 /* This would make this whole thing pointless */
2362 if (!last_request->intersect)
2363 BUG_ON(rd != cfg80211_regdomain);
2365 /* update all wiphys now with the new established regulatory domain */
2366 update_all_wiphy_regulatory(last_request->initiator);
2368 print_regdomain(cfg80211_regdomain);
2370 nl80211_send_reg_change_event(last_request);
2372 reg_set_request_processed();
2374 mutex_unlock(®_mutex);
2379 #ifdef CONFIG_HOTPLUG
2380 int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
2382 if (last_request && !last_request->processed) {
2383 if (add_uevent_var(env, "COUNTRY=%c%c",
2384 last_request->alpha2[0],
2385 last_request->alpha2[1]))
2392 int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
2396 #endif /* CONFIG_HOTPLUG */
2398 void wiphy_regulatory_register(struct wiphy *wiphy)
2400 assert_cfg80211_lock();
2402 mutex_lock(®_mutex);
2404 if (!reg_dev_ignore_cell_hint(wiphy))
2405 reg_num_devs_support_basehint++;
2407 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
2409 mutex_unlock(®_mutex);
2412 /* Caller must hold cfg80211_mutex */
2413 void wiphy_regulatory_deregister(struct wiphy *wiphy)
2415 struct wiphy *request_wiphy = NULL;
2417 assert_cfg80211_lock();
2419 mutex_lock(®_mutex);
2421 if (!reg_dev_ignore_cell_hint(wiphy))
2422 reg_num_devs_support_basehint--;
2427 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
2429 if (!request_wiphy || request_wiphy != wiphy)
2432 last_request->wiphy_idx = WIPHY_IDX_STALE;
2433 last_request->country_ie_env = ENVIRON_ANY;
2435 mutex_unlock(®_mutex);
2438 static void reg_timeout_work(struct work_struct *work)
2440 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2441 "restoring regulatory settings\n");
2442 restore_regulatory_settings(true);
2445 int __init regulatory_init(void)
2449 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
2450 if (IS_ERR(reg_pdev))
2451 return PTR_ERR(reg_pdev);
2453 reg_pdev->dev.type = ®_device_type;
2455 spin_lock_init(®_requests_lock);
2456 spin_lock_init(®_pending_beacons_lock);
2458 reg_regdb_size_check();
2460 cfg80211_regdomain = cfg80211_world_regdom;
2462 user_alpha2[0] = '9';
2463 user_alpha2[1] = '7';
2465 /* We always try to get an update for the static regdomain */
2466 err = regulatory_hint_core(cfg80211_regdomain->alpha2);
2471 * N.B. kobject_uevent_env() can fail mainly for when we're out
2472 * memory which is handled and propagated appropriately above
2473 * but it can also fail during a netlink_broadcast() or during
2474 * early boot for call_usermodehelper(). For now treat these
2475 * errors as non-fatal.
2477 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2478 #ifdef CONFIG_CFG80211_REG_DEBUG
2479 /* We want to find out exactly why when debugging */
2485 * Finally, if the user set the module parameter treat it
2488 if (!is_world_regdom(ieee80211_regdom))
2489 regulatory_hint_user(ieee80211_regdom,
2490 NL80211_USER_REG_HINT_USER);
2495 void /* __init_or_exit */ regulatory_exit(void)
2497 struct regulatory_request *reg_request, *tmp;
2498 struct reg_beacon *reg_beacon, *btmp;
2500 cancel_work_sync(®_work);
2501 cancel_delayed_work_sync(®_timeout);
2503 mutex_lock(&cfg80211_mutex);
2504 mutex_lock(®_mutex);
2506 reset_regdomains(true);
2508 dev_set_uevent_suppress(®_pdev->dev, true);
2510 platform_device_unregister(reg_pdev);
2512 spin_lock_bh(®_pending_beacons_lock);
2513 if (!list_empty(®_pending_beacons)) {
2514 list_for_each_entry_safe(reg_beacon, btmp,
2515 ®_pending_beacons, list) {
2516 list_del(®_beacon->list);
2520 spin_unlock_bh(®_pending_beacons_lock);
2522 if (!list_empty(®_beacon_list)) {
2523 list_for_each_entry_safe(reg_beacon, btmp,
2524 ®_beacon_list, list) {
2525 list_del(®_beacon->list);
2530 spin_lock(®_requests_lock);
2531 if (!list_empty(®_requests_list)) {
2532 list_for_each_entry_safe(reg_request, tmp,
2533 ®_requests_list, list) {
2534 list_del(®_request->list);
2538 spin_unlock(®_requests_lock);
2540 mutex_unlock(®_mutex);
2541 mutex_unlock(&cfg80211_mutex);