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
101 static DEFINE_MUTEX(reg_mutex
);
103 static inline void assert_reg_lock(void)
105 lockdep_assert_held(®_mutex
);
108 /* Used to queue up regulatory hints */
109 static LIST_HEAD(reg_requests_list
);
110 static spinlock_t reg_requests_lock
;
112 /* Used to queue up beacon hints for review */
113 static LIST_HEAD(reg_pending_beacons
);
114 static spinlock_t reg_pending_beacons_lock
;
116 /* Used to keep track of processed beacon hints */
117 static LIST_HEAD(reg_beacon_list
);
120 struct list_head list
;
121 struct ieee80211_channel chan
;
124 static void reg_todo(struct work_struct
*work
);
125 static DECLARE_WORK(reg_work
, reg_todo
);
127 static void reg_timeout_work(struct work_struct
*work
);
128 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
130 /* We keep a static world regulatory domain in case of the absence of CRDA */
131 static const struct ieee80211_regdomain world_regdom
= {
135 /* IEEE 802.11b/g, channels 1..11 */
136 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
137 /* IEEE 802.11b/g, channels 12..13. No HT40
138 * channel fits here. */
139 REG_RULE(2467-10, 2472+10, 20, 6, 20,
140 NL80211_RRF_PASSIVE_SCAN
|
141 NL80211_RRF_NO_IBSS
),
142 /* IEEE 802.11 channel 14 - Only JP enables
143 * this and for 802.11b only */
144 REG_RULE(2484-10, 2484+10, 20, 6, 20,
145 NL80211_RRF_PASSIVE_SCAN
|
146 NL80211_RRF_NO_IBSS
|
147 NL80211_RRF_NO_OFDM
),
148 /* IEEE 802.11a, channel 36..48 */
149 REG_RULE(5180-10, 5240+10, 40, 6, 20,
150 NL80211_RRF_PASSIVE_SCAN
|
151 NL80211_RRF_NO_IBSS
),
153 /* NB: 5260 MHz - 5700 MHz requies DFS */
155 /* IEEE 802.11a, channel 149..165 */
156 REG_RULE(5745-10, 5825+10, 40, 6, 20,
157 NL80211_RRF_PASSIVE_SCAN
|
158 NL80211_RRF_NO_IBSS
),
162 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
165 static char *ieee80211_regdom
= "00";
166 static char user_alpha2
[2];
168 module_param(ieee80211_regdom
, charp
, 0444);
169 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
171 static void reset_regdomains(bool full_reset
)
173 /* avoid freeing static information or freeing something twice */
174 if (cfg80211_regdomain
== cfg80211_world_regdom
)
175 cfg80211_regdomain
= NULL
;
176 if (cfg80211_world_regdom
== &world_regdom
)
177 cfg80211_world_regdom
= NULL
;
178 if (cfg80211_regdomain
== &world_regdom
)
179 cfg80211_regdomain
= NULL
;
181 kfree(cfg80211_regdomain
);
182 kfree(cfg80211_world_regdom
);
184 cfg80211_world_regdom
= &world_regdom
;
185 cfg80211_regdomain
= NULL
;
190 if (last_request
!= &core_request_world
)
192 last_request
= &core_request_world
;
196 * Dynamic world regulatory domain requested by the wireless
197 * core upon initialization
199 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
201 BUG_ON(!last_request
);
203 reset_regdomains(false);
205 cfg80211_world_regdom
= rd
;
206 cfg80211_regdomain
= rd
;
209 bool is_world_regdom(const char *alpha2
)
213 if (alpha2
[0] == '0' && alpha2
[1] == '0')
218 static bool is_alpha2_set(const char *alpha2
)
222 if (alpha2
[0] != 0 && alpha2
[1] != 0)
227 static bool is_unknown_alpha2(const char *alpha2
)
232 * Special case where regulatory domain was built by driver
233 * but a specific alpha2 cannot be determined
235 if (alpha2
[0] == '9' && alpha2
[1] == '9')
240 static bool is_intersected_alpha2(const char *alpha2
)
245 * Special case where regulatory domain is the
246 * result of an intersection between two regulatory domain
249 if (alpha2
[0] == '9' && alpha2
[1] == '8')
254 static bool is_an_alpha2(const char *alpha2
)
258 if (isalpha(alpha2
[0]) && isalpha(alpha2
[1]))
263 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
265 if (!alpha2_x
|| !alpha2_y
)
267 if (alpha2_x
[0] == alpha2_y
[0] &&
268 alpha2_x
[1] == alpha2_y
[1])
273 static bool regdom_changes(const char *alpha2
)
275 assert_cfg80211_lock();
277 if (!cfg80211_regdomain
)
279 if (alpha2_equal(cfg80211_regdomain
->alpha2
, alpha2
))
285 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
286 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
287 * has ever been issued.
289 static bool is_user_regdom_saved(void)
291 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
294 /* This would indicate a mistake on the design */
295 if (WARN((!is_world_regdom(user_alpha2
) &&
296 !is_an_alpha2(user_alpha2
)),
297 "Unexpected user alpha2: %c%c\n",
305 static int reg_copy_regd(const struct ieee80211_regdomain
**dst_regd
,
306 const struct ieee80211_regdomain
*src_regd
)
308 struct ieee80211_regdomain
*regd
;
309 int size_of_regd
= 0;
312 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
313 ((src_regd
->n_reg_rules
+ 1) * sizeof(struct ieee80211_reg_rule
));
315 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
319 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
321 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
322 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
323 sizeof(struct ieee80211_reg_rule
));
329 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
330 struct reg_regdb_search_request
{
332 struct list_head list
;
335 static LIST_HEAD(reg_regdb_search_list
);
336 static DEFINE_MUTEX(reg_regdb_search_mutex
);
338 static void reg_regdb_search(struct work_struct
*work
)
340 struct reg_regdb_search_request
*request
;
341 const struct ieee80211_regdomain
*curdom
, *regdom
;
344 mutex_lock(®_regdb_search_mutex
);
345 while (!list_empty(®_regdb_search_list
)) {
346 request
= list_first_entry(®_regdb_search_list
,
347 struct reg_regdb_search_request
,
349 list_del(&request
->list
);
351 for (i
=0; i
<reg_regdb_size
; i
++) {
352 curdom
= reg_regdb
[i
];
354 if (!memcmp(request
->alpha2
, curdom
->alpha2
, 2)) {
355 r
= reg_copy_regd(®dom
, curdom
);
358 mutex_lock(&cfg80211_mutex
);
360 mutex_unlock(&cfg80211_mutex
);
367 mutex_unlock(®_regdb_search_mutex
);
370 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
372 static void reg_regdb_query(const char *alpha2
)
374 struct reg_regdb_search_request
*request
;
379 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
383 memcpy(request
->alpha2
, alpha2
, 2);
385 mutex_lock(®_regdb_search_mutex
);
386 list_add_tail(&request
->list
, ®_regdb_search_list
);
387 mutex_unlock(®_regdb_search_mutex
);
389 schedule_work(®_regdb_work
);
392 /* Feel free to add any other sanity checks here */
393 static void reg_regdb_size_check(void)
395 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
396 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
399 static inline void reg_regdb_size_check(void) {}
400 static inline void reg_regdb_query(const char *alpha2
) {}
401 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
404 * This lets us keep regulatory code which is updated on a regulatory
405 * basis in userspace. Country information is filled in by
408 static int call_crda(const char *alpha2
)
410 if (!is_world_regdom((char *) alpha2
))
411 pr_info("Calling CRDA for country: %c%c\n",
412 alpha2
[0], alpha2
[1]);
414 pr_info("Calling CRDA to update world regulatory domain\n");
416 /* query internal regulatory database (if it exists) */
417 reg_regdb_query(alpha2
);
419 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
422 /* Used by nl80211 before kmalloc'ing our regulatory domain */
423 bool reg_is_valid_request(const char *alpha2
)
425 assert_cfg80211_lock();
430 return alpha2_equal(last_request
->alpha2
, alpha2
);
433 /* Sanity check on a regulatory rule */
434 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
436 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
439 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
442 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
445 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
447 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
448 freq_range
->max_bandwidth_khz
> freq_diff
)
454 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
456 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
459 if (!rd
->n_reg_rules
)
462 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
465 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
466 reg_rule
= &rd
->reg_rules
[i
];
467 if (!is_valid_reg_rule(reg_rule
))
474 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
478 u32 start_freq_khz
, end_freq_khz
;
480 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
481 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
483 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
484 end_freq_khz
<= freq_range
->end_freq_khz
)
491 * freq_in_rule_band - tells us if a frequency is in a frequency band
492 * @freq_range: frequency rule we want to query
493 * @freq_khz: frequency we are inquiring about
495 * This lets us know if a specific frequency rule is or is not relevant to
496 * a specific frequency's band. Bands are device specific and artificial
497 * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is
498 * safe for now to assume that a frequency rule should not be part of a
499 * frequency's band if the start freq or end freq are off by more than 2 GHz.
500 * This resolution can be lowered and should be considered as we add
501 * regulatory rule support for other "bands".
503 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
506 #define ONE_GHZ_IN_KHZ 1000000
507 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= (2 * ONE_GHZ_IN_KHZ
))
509 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= (2 * ONE_GHZ_IN_KHZ
))
512 #undef ONE_GHZ_IN_KHZ
516 * Helper for regdom_intersect(), this does the real
517 * mathematical intersection fun
519 static int reg_rules_intersect(
520 const struct ieee80211_reg_rule
*rule1
,
521 const struct ieee80211_reg_rule
*rule2
,
522 struct ieee80211_reg_rule
*intersected_rule
)
524 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
525 struct ieee80211_freq_range
*freq_range
;
526 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
527 struct ieee80211_power_rule
*power_rule
;
530 freq_range1
= &rule1
->freq_range
;
531 freq_range2
= &rule2
->freq_range
;
532 freq_range
= &intersected_rule
->freq_range
;
534 power_rule1
= &rule1
->power_rule
;
535 power_rule2
= &rule2
->power_rule
;
536 power_rule
= &intersected_rule
->power_rule
;
538 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
539 freq_range2
->start_freq_khz
);
540 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
541 freq_range2
->end_freq_khz
);
542 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
543 freq_range2
->max_bandwidth_khz
);
545 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
546 if (freq_range
->max_bandwidth_khz
> freq_diff
)
547 freq_range
->max_bandwidth_khz
= freq_diff
;
549 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
550 power_rule2
->max_eirp
);
551 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
552 power_rule2
->max_antenna_gain
);
554 intersected_rule
->flags
= (rule1
->flags
| rule2
->flags
);
556 if (!is_valid_reg_rule(intersected_rule
))
563 * regdom_intersect - do the intersection between two regulatory domains
564 * @rd1: first regulatory domain
565 * @rd2: second regulatory domain
567 * Use this function to get the intersection between two regulatory domains.
568 * Once completed we will mark the alpha2 for the rd as intersected, "98",
569 * as no one single alpha2 can represent this regulatory domain.
571 * Returns a pointer to the regulatory domain structure which will hold the
572 * resulting intersection of rules between rd1 and rd2. We will
573 * kzalloc() this structure for you.
575 static struct ieee80211_regdomain
*regdom_intersect(
576 const struct ieee80211_regdomain
*rd1
,
577 const struct ieee80211_regdomain
*rd2
)
581 unsigned int num_rules
= 0, rule_idx
= 0;
582 const struct ieee80211_reg_rule
*rule1
, *rule2
;
583 struct ieee80211_reg_rule
*intersected_rule
;
584 struct ieee80211_regdomain
*rd
;
585 /* This is just a dummy holder to help us count */
586 struct ieee80211_reg_rule irule
;
588 /* Uses the stack temporarily for counter arithmetic */
589 intersected_rule
= &irule
;
591 memset(intersected_rule
, 0, sizeof(struct ieee80211_reg_rule
));
597 * First we get a count of the rules we'll need, then we actually
598 * build them. This is to so we can malloc() and free() a
599 * regdomain once. The reason we use reg_rules_intersect() here
600 * is it will return -EINVAL if the rule computed makes no sense.
601 * All rules that do check out OK are valid.
604 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
605 rule1
= &rd1
->reg_rules
[x
];
606 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
607 rule2
= &rd2
->reg_rules
[y
];
608 if (!reg_rules_intersect(rule1
, rule2
,
611 memset(intersected_rule
, 0,
612 sizeof(struct ieee80211_reg_rule
));
619 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
620 ((num_rules
+ 1) * sizeof(struct ieee80211_reg_rule
));
622 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
626 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
627 rule1
= &rd1
->reg_rules
[x
];
628 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
629 rule2
= &rd2
->reg_rules
[y
];
631 * This time around instead of using the stack lets
632 * write to the target rule directly saving ourselves
635 intersected_rule
= &rd
->reg_rules
[rule_idx
];
636 r
= reg_rules_intersect(rule1
, rule2
,
639 * No need to memset here the intersected rule here as
640 * we're not using the stack anymore
648 if (rule_idx
!= num_rules
) {
653 rd
->n_reg_rules
= num_rules
;
661 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
662 * want to just have the channel structure use these
664 static u32
map_regdom_flags(u32 rd_flags
)
666 u32 channel_flags
= 0;
667 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
668 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
669 if (rd_flags
& NL80211_RRF_NO_IBSS
)
670 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
671 if (rd_flags
& NL80211_RRF_DFS
)
672 channel_flags
|= IEEE80211_CHAN_RADAR
;
673 return channel_flags
;
676 static int freq_reg_info_regd(struct wiphy
*wiphy
,
679 const struct ieee80211_reg_rule
**reg_rule
,
680 const struct ieee80211_regdomain
*custom_regd
)
683 bool band_rule_found
= false;
684 const struct ieee80211_regdomain
*regd
;
685 bool bw_fits
= false;
688 desired_bw_khz
= MHZ_TO_KHZ(20);
690 regd
= custom_regd
? custom_regd
: cfg80211_regdomain
;
693 * Follow the driver's regulatory domain, if present, unless a country
694 * IE has been processed or a user wants to help complaince further
697 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
698 last_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
705 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
706 const struct ieee80211_reg_rule
*rr
;
707 const struct ieee80211_freq_range
*fr
= NULL
;
709 rr
= ®d
->reg_rules
[i
];
710 fr
= &rr
->freq_range
;
713 * We only need to know if one frequency rule was
714 * was in center_freq's band, that's enough, so lets
715 * not overwrite it once found
717 if (!band_rule_found
)
718 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
720 bw_fits
= reg_does_bw_fit(fr
,
724 if (band_rule_found
&& bw_fits
) {
730 if (!band_rule_found
)
736 int freq_reg_info(struct wiphy
*wiphy
,
739 const struct ieee80211_reg_rule
**reg_rule
)
741 assert_cfg80211_lock();
742 return freq_reg_info_regd(wiphy
,
748 EXPORT_SYMBOL(freq_reg_info
);
750 #ifdef CONFIG_CFG80211_REG_DEBUG
751 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
754 case NL80211_REGDOM_SET_BY_CORE
:
755 return "Set by core";
756 case NL80211_REGDOM_SET_BY_USER
:
757 return "Set by user";
758 case NL80211_REGDOM_SET_BY_DRIVER
:
759 return "Set by driver";
760 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
761 return "Set by country IE";
768 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
770 const struct ieee80211_reg_rule
*reg_rule
)
772 const struct ieee80211_power_rule
*power_rule
;
773 const struct ieee80211_freq_range
*freq_range
;
774 char max_antenna_gain
[32];
776 power_rule
= ®_rule
->power_rule
;
777 freq_range
= ®_rule
->freq_range
;
779 if (!power_rule
->max_antenna_gain
)
780 snprintf(max_antenna_gain
, 32, "N/A");
782 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
784 REG_DBG_PRINT("Updating information on frequency %d MHz "
785 "for a %d MHz width channel with regulatory rule:\n",
787 KHZ_TO_MHZ(desired_bw_khz
));
789 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
790 freq_range
->start_freq_khz
,
791 freq_range
->end_freq_khz
,
792 freq_range
->max_bandwidth_khz
,
794 power_rule
->max_eirp
);
797 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
799 const struct ieee80211_reg_rule
*reg_rule
)
806 * Note that right now we assume the desired channel bandwidth
807 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
808 * per channel, the primary and the extension channel). To support
809 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
810 * new ieee80211_channel.target_bw and re run the regulatory check
811 * on the wiphy with the target_bw specified. Then we can simply use
812 * that below for the desired_bw_khz below.
814 static void handle_channel(struct wiphy
*wiphy
,
815 enum nl80211_reg_initiator initiator
,
816 enum ieee80211_band band
,
817 unsigned int chan_idx
)
820 u32 flags
, bw_flags
= 0;
821 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
822 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
823 const struct ieee80211_power_rule
*power_rule
= NULL
;
824 const struct ieee80211_freq_range
*freq_range
= NULL
;
825 struct ieee80211_supported_band
*sband
;
826 struct ieee80211_channel
*chan
;
827 struct wiphy
*request_wiphy
= NULL
;
829 assert_cfg80211_lock();
831 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
833 sband
= wiphy
->bands
[band
];
834 BUG_ON(chan_idx
>= sband
->n_channels
);
835 chan
= &sband
->channels
[chan_idx
];
837 flags
= chan
->orig_flags
;
839 r
= freq_reg_info(wiphy
,
840 MHZ_TO_KHZ(chan
->center_freq
),
846 * We will disable all channels that do not match our
847 * received regulatory rule unless the hint is coming
848 * from a Country IE and the Country IE had no information
849 * about a band. The IEEE 802.11 spec allows for an AP
850 * to send only a subset of the regulatory rules allowed,
851 * so an AP in the US that only supports 2.4 GHz may only send
852 * a country IE with information for the 2.4 GHz band
853 * while 5 GHz is still supported.
855 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
859 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
860 chan
->flags
= IEEE80211_CHAN_DISABLED
;
864 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
866 power_rule
= ®_rule
->power_rule
;
867 freq_range
= ®_rule
->freq_range
;
869 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
870 bw_flags
= IEEE80211_CHAN_NO_HT40
;
872 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
873 request_wiphy
&& request_wiphy
== wiphy
&&
874 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
876 * This guarantees the driver's requested regulatory domain
877 * will always be used as a base for further regulatory
880 chan
->flags
= chan
->orig_flags
=
881 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
882 chan
->max_antenna_gain
= chan
->orig_mag
=
883 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
884 chan
->max_power
= chan
->orig_mpwr
=
885 (int) MBM_TO_DBM(power_rule
->max_eirp
);
889 chan
->beacon_found
= false;
890 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
891 chan
->max_antenna_gain
= min(chan
->orig_mag
,
892 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
));
893 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
894 chan
->max_power
= min(chan
->max_power
, chan
->max_reg_power
);
897 static void handle_band(struct wiphy
*wiphy
,
898 enum ieee80211_band band
,
899 enum nl80211_reg_initiator initiator
)
902 struct ieee80211_supported_band
*sband
;
904 BUG_ON(!wiphy
->bands
[band
]);
905 sband
= wiphy
->bands
[band
];
907 for (i
= 0; i
< sband
->n_channels
; i
++)
908 handle_channel(wiphy
, initiator
, band
, i
);
911 static bool ignore_reg_update(struct wiphy
*wiphy
,
912 enum nl80211_reg_initiator initiator
)
915 REG_DBG_PRINT("Ignoring regulatory request %s since "
916 "last_request is not set\n",
917 reg_initiator_name(initiator
));
921 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
922 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
923 REG_DBG_PRINT("Ignoring regulatory request %s "
924 "since the driver uses its own custom "
925 "regulatory domain\n",
926 reg_initiator_name(initiator
));
931 * wiphy->regd will be set once the device has its own
932 * desired regulatory domain set
934 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
935 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
936 !is_world_regdom(last_request
->alpha2
)) {
937 REG_DBG_PRINT("Ignoring regulatory request %s "
938 "since the driver requires its own regulatory "
939 "domain to be set first\n",
940 reg_initiator_name(initiator
));
947 static void handle_reg_beacon(struct wiphy
*wiphy
,
948 unsigned int chan_idx
,
949 struct reg_beacon
*reg_beacon
)
951 struct ieee80211_supported_band
*sband
;
952 struct ieee80211_channel
*chan
;
953 bool channel_changed
= false;
954 struct ieee80211_channel chan_before
;
956 assert_cfg80211_lock();
958 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
959 chan
= &sband
->channels
[chan_idx
];
961 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
964 if (chan
->beacon_found
)
967 chan
->beacon_found
= true;
969 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
972 chan_before
.center_freq
= chan
->center_freq
;
973 chan_before
.flags
= chan
->flags
;
975 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
976 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
977 channel_changed
= true;
980 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
981 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
982 channel_changed
= true;
986 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
990 * Called when a scan on a wiphy finds a beacon on
993 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
994 struct reg_beacon
*reg_beacon
)
997 struct ieee80211_supported_band
*sband
;
999 assert_cfg80211_lock();
1001 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1004 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1006 for (i
= 0; i
< sband
->n_channels
; i
++)
1007 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1011 * Called upon reg changes or a new wiphy is added
1013 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1016 struct ieee80211_supported_band
*sband
;
1017 struct reg_beacon
*reg_beacon
;
1019 assert_cfg80211_lock();
1021 if (list_empty(®_beacon_list
))
1024 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1025 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1027 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1028 for (i
= 0; i
< sband
->n_channels
; i
++)
1029 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1033 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1035 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1036 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1039 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1040 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1045 /* Reap the advantages of previously found beacons */
1046 static void reg_process_beacons(struct wiphy
*wiphy
)
1049 * Means we are just firing up cfg80211, so no beacons would
1050 * have been processed yet.
1054 if (!reg_is_world_roaming(wiphy
))
1056 wiphy_update_beacon_reg(wiphy
);
1059 static bool is_ht40_not_allowed(struct ieee80211_channel
*chan
)
1063 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1065 /* This would happen when regulatory rules disallow HT40 completely */
1066 if (IEEE80211_CHAN_NO_HT40
== (chan
->flags
& (IEEE80211_CHAN_NO_HT40
)))
1071 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1072 enum ieee80211_band band
,
1073 unsigned int chan_idx
)
1075 struct ieee80211_supported_band
*sband
;
1076 struct ieee80211_channel
*channel
;
1077 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1080 assert_cfg80211_lock();
1082 sband
= wiphy
->bands
[band
];
1083 BUG_ON(chan_idx
>= sband
->n_channels
);
1084 channel
= &sband
->channels
[chan_idx
];
1086 if (is_ht40_not_allowed(channel
)) {
1087 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1092 * We need to ensure the extension channels exist to
1093 * be able to use HT40- or HT40+, this finds them (or not)
1095 for (i
= 0; i
< sband
->n_channels
; i
++) {
1096 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1097 if (c
->center_freq
== (channel
->center_freq
- 20))
1099 if (c
->center_freq
== (channel
->center_freq
+ 20))
1104 * Please note that this assumes target bandwidth is 20 MHz,
1105 * if that ever changes we also need to change the below logic
1106 * to include that as well.
1108 if (is_ht40_not_allowed(channel_before
))
1109 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1111 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1113 if (is_ht40_not_allowed(channel_after
))
1114 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1116 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1119 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1120 enum ieee80211_band band
)
1123 struct ieee80211_supported_band
*sband
;
1125 BUG_ON(!wiphy
->bands
[band
]);
1126 sband
= wiphy
->bands
[band
];
1128 for (i
= 0; i
< sband
->n_channels
; i
++)
1129 reg_process_ht_flags_channel(wiphy
, band
, i
);
1132 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1134 enum ieee80211_band band
;
1139 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1140 if (wiphy
->bands
[band
])
1141 reg_process_ht_flags_band(wiphy
, band
);
1146 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1147 enum nl80211_reg_initiator initiator
)
1149 enum ieee80211_band band
;
1153 if (ignore_reg_update(wiphy
, initiator
))
1156 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1158 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1159 if (wiphy
->bands
[band
])
1160 handle_band(wiphy
, band
, initiator
);
1163 reg_process_beacons(wiphy
);
1164 reg_process_ht_flags(wiphy
);
1165 if (wiphy
->reg_notifier
)
1166 wiphy
->reg_notifier(wiphy
, last_request
);
1169 void regulatory_update(struct wiphy
*wiphy
,
1170 enum nl80211_reg_initiator setby
)
1172 mutex_lock(®_mutex
);
1173 wiphy_update_regulatory(wiphy
, setby
);
1174 mutex_unlock(®_mutex
);
1177 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1179 struct cfg80211_registered_device
*rdev
;
1180 struct wiphy
*wiphy
;
1182 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1183 wiphy
= &rdev
->wiphy
;
1184 wiphy_update_regulatory(wiphy
, initiator
);
1186 * Regulatory updates set by CORE are ignored for custom
1187 * regulatory cards. Let us notify the changes to the driver,
1188 * as some drivers used this to restore its orig_* reg domain.
1190 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1191 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1192 wiphy
->reg_notifier
)
1193 wiphy
->reg_notifier(wiphy
, last_request
);
1197 static void handle_channel_custom(struct wiphy
*wiphy
,
1198 enum ieee80211_band band
,
1199 unsigned int chan_idx
,
1200 const struct ieee80211_regdomain
*regd
)
1203 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1205 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1206 const struct ieee80211_power_rule
*power_rule
= NULL
;
1207 const struct ieee80211_freq_range
*freq_range
= NULL
;
1208 struct ieee80211_supported_band
*sband
;
1209 struct ieee80211_channel
*chan
;
1213 sband
= wiphy
->bands
[band
];
1214 BUG_ON(chan_idx
>= sband
->n_channels
);
1215 chan
= &sband
->channels
[chan_idx
];
1217 r
= freq_reg_info_regd(wiphy
,
1218 MHZ_TO_KHZ(chan
->center_freq
),
1224 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1225 "regd has no rule that fits a %d MHz "
1228 KHZ_TO_MHZ(desired_bw_khz
));
1229 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1233 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1235 power_rule
= ®_rule
->power_rule
;
1236 freq_range
= ®_rule
->freq_range
;
1238 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1239 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1241 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1242 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1243 chan
->max_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1246 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1247 const struct ieee80211_regdomain
*regd
)
1250 struct ieee80211_supported_band
*sband
;
1252 BUG_ON(!wiphy
->bands
[band
]);
1253 sband
= wiphy
->bands
[band
];
1255 for (i
= 0; i
< sband
->n_channels
; i
++)
1256 handle_channel_custom(wiphy
, band
, i
, regd
);
1259 /* Used by drivers prior to wiphy registration */
1260 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1261 const struct ieee80211_regdomain
*regd
)
1263 enum ieee80211_band band
;
1264 unsigned int bands_set
= 0;
1266 mutex_lock(®_mutex
);
1267 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1268 if (!wiphy
->bands
[band
])
1270 handle_band_custom(wiphy
, band
, regd
);
1273 mutex_unlock(®_mutex
);
1276 * no point in calling this if it won't have any effect
1277 * on your device's supportd bands.
1279 WARN_ON(!bands_set
);
1281 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1284 * Return value which can be used by ignore_request() to indicate
1285 * it has been determined we should intersect two regulatory domains
1287 #define REG_INTERSECT 1
1289 /* This has the logic which determines when a new request
1290 * should be ignored. */
1291 static int ignore_request(struct wiphy
*wiphy
,
1292 struct regulatory_request
*pending_request
)
1294 struct wiphy
*last_wiphy
= NULL
;
1296 assert_cfg80211_lock();
1298 /* All initial requests are respected */
1302 switch (pending_request
->initiator
) {
1303 case NL80211_REGDOM_SET_BY_CORE
:
1305 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1307 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1309 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1311 if (last_request
->initiator
==
1312 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1313 if (last_wiphy
!= wiphy
) {
1315 * Two cards with two APs claiming different
1316 * Country IE alpha2s. We could
1317 * intersect them, but that seems unlikely
1318 * to be correct. Reject second one for now.
1320 if (regdom_changes(pending_request
->alpha2
))
1325 * Two consecutive Country IE hints on the same wiphy.
1326 * This should be picked up early by the driver/stack
1328 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1333 case NL80211_REGDOM_SET_BY_DRIVER
:
1334 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1335 if (regdom_changes(pending_request
->alpha2
))
1341 * This would happen if you unplug and plug your card
1342 * back in or if you add a new device for which the previously
1343 * loaded card also agrees on the regulatory domain.
1345 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1346 !regdom_changes(pending_request
->alpha2
))
1349 return REG_INTERSECT
;
1350 case NL80211_REGDOM_SET_BY_USER
:
1351 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1352 return REG_INTERSECT
;
1354 * If the user knows better the user should set the regdom
1355 * to their country before the IE is picked up
1357 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1358 last_request
->intersect
)
1361 * Process user requests only after previous user/driver/core
1362 * requests have been processed
1364 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1365 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1366 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1367 if (regdom_changes(last_request
->alpha2
))
1371 if (!regdom_changes(pending_request
->alpha2
))
1380 static void reg_set_request_processed(void)
1382 bool need_more_processing
= false;
1384 last_request
->processed
= true;
1386 spin_lock(®_requests_lock
);
1387 if (!list_empty(®_requests_list
))
1388 need_more_processing
= true;
1389 spin_unlock(®_requests_lock
);
1391 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1392 cancel_delayed_work(®_timeout
);
1394 if (need_more_processing
)
1395 schedule_work(®_work
);
1399 * __regulatory_hint - hint to the wireless core a regulatory domain
1400 * @wiphy: if the hint comes from country information from an AP, this
1401 * is required to be set to the wiphy that received the information
1402 * @pending_request: the regulatory request currently being processed
1404 * The Wireless subsystem can use this function to hint to the wireless core
1405 * what it believes should be the current regulatory domain.
1407 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1408 * already been set or other standard error codes.
1410 * Caller must hold &cfg80211_mutex and ®_mutex
1412 static int __regulatory_hint(struct wiphy
*wiphy
,
1413 struct regulatory_request
*pending_request
)
1415 bool intersect
= false;
1418 assert_cfg80211_lock();
1420 r
= ignore_request(wiphy
, pending_request
);
1422 if (r
== REG_INTERSECT
) {
1423 if (pending_request
->initiator
==
1424 NL80211_REGDOM_SET_BY_DRIVER
) {
1425 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1427 kfree(pending_request
);
1434 * If the regulatory domain being requested by the
1435 * driver has already been set just copy it to the
1438 if (r
== -EALREADY
&&
1439 pending_request
->initiator
==
1440 NL80211_REGDOM_SET_BY_DRIVER
) {
1441 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1443 kfree(pending_request
);
1449 kfree(pending_request
);
1454 if (last_request
!= &core_request_world
)
1455 kfree(last_request
);
1457 last_request
= pending_request
;
1458 last_request
->intersect
= intersect
;
1460 pending_request
= NULL
;
1462 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1463 user_alpha2
[0] = last_request
->alpha2
[0];
1464 user_alpha2
[1] = last_request
->alpha2
[1];
1467 /* When r == REG_INTERSECT we do need to call CRDA */
1470 * Since CRDA will not be called in this case as we already
1471 * have applied the requested regulatory domain before we just
1472 * inform userspace we have processed the request
1474 if (r
== -EALREADY
) {
1475 nl80211_send_reg_change_event(last_request
);
1476 reg_set_request_processed();
1481 return call_crda(last_request
->alpha2
);
1484 /* This processes *all* regulatory hints */
1485 static void reg_process_hint(struct regulatory_request
*reg_request
,
1486 enum nl80211_reg_initiator reg_initiator
)
1489 struct wiphy
*wiphy
= NULL
;
1491 BUG_ON(!reg_request
->alpha2
);
1493 if (wiphy_idx_valid(reg_request
->wiphy_idx
))
1494 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1496 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1502 r
= __regulatory_hint(wiphy
, reg_request
);
1503 /* This is required so that the orig_* parameters are saved */
1504 if (r
== -EALREADY
&& wiphy
&&
1505 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
1506 wiphy_update_regulatory(wiphy
, reg_initiator
);
1511 * We only time out user hints, given that they should be the only
1512 * source of bogus requests.
1514 if (r
!= -EALREADY
&&
1515 reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1516 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1520 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1521 * Regulatory hints come on a first come first serve basis and we
1522 * must process each one atomically.
1524 static void reg_process_pending_hints(void)
1526 struct regulatory_request
*reg_request
;
1528 mutex_lock(&cfg80211_mutex
);
1529 mutex_lock(®_mutex
);
1531 /* When last_request->processed becomes true this will be rescheduled */
1532 if (last_request
&& !last_request
->processed
) {
1533 REG_DBG_PRINT("Pending regulatory request, waiting "
1534 "for it to be processed...\n");
1538 spin_lock(®_requests_lock
);
1540 if (list_empty(®_requests_list
)) {
1541 spin_unlock(®_requests_lock
);
1545 reg_request
= list_first_entry(®_requests_list
,
1546 struct regulatory_request
,
1548 list_del_init(®_request
->list
);
1550 spin_unlock(®_requests_lock
);
1552 reg_process_hint(reg_request
, reg_request
->initiator
);
1555 mutex_unlock(®_mutex
);
1556 mutex_unlock(&cfg80211_mutex
);
1559 /* Processes beacon hints -- this has nothing to do with country IEs */
1560 static void reg_process_pending_beacon_hints(void)
1562 struct cfg80211_registered_device
*rdev
;
1563 struct reg_beacon
*pending_beacon
, *tmp
;
1566 * No need to hold the reg_mutex here as we just touch wiphys
1567 * and do not read or access regulatory variables.
1569 mutex_lock(&cfg80211_mutex
);
1571 /* This goes through the _pending_ beacon list */
1572 spin_lock_bh(®_pending_beacons_lock
);
1574 if (list_empty(®_pending_beacons
)) {
1575 spin_unlock_bh(®_pending_beacons_lock
);
1579 list_for_each_entry_safe(pending_beacon
, tmp
,
1580 ®_pending_beacons
, list
) {
1582 list_del_init(&pending_beacon
->list
);
1584 /* Applies the beacon hint to current wiphys */
1585 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1586 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1588 /* Remembers the beacon hint for new wiphys or reg changes */
1589 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1592 spin_unlock_bh(®_pending_beacons_lock
);
1594 mutex_unlock(&cfg80211_mutex
);
1597 static void reg_todo(struct work_struct
*work
)
1599 reg_process_pending_hints();
1600 reg_process_pending_beacon_hints();
1603 static void queue_regulatory_request(struct regulatory_request
*request
)
1605 if (isalpha(request
->alpha2
[0]))
1606 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1607 if (isalpha(request
->alpha2
[1]))
1608 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1610 spin_lock(®_requests_lock
);
1611 list_add_tail(&request
->list
, ®_requests_list
);
1612 spin_unlock(®_requests_lock
);
1614 schedule_work(®_work
);
1618 * Core regulatory hint -- happens during cfg80211_init()
1619 * and when we restore regulatory settings.
1621 static int regulatory_hint_core(const char *alpha2
)
1623 struct regulatory_request
*request
;
1625 request
= kzalloc(sizeof(struct regulatory_request
),
1630 request
->alpha2
[0] = alpha2
[0];
1631 request
->alpha2
[1] = alpha2
[1];
1632 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1634 queue_regulatory_request(request
);
1640 int regulatory_hint_user(const char *alpha2
)
1642 struct regulatory_request
*request
;
1646 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1650 request
->wiphy_idx
= WIPHY_IDX_STALE
;
1651 request
->alpha2
[0] = alpha2
[0];
1652 request
->alpha2
[1] = alpha2
[1];
1653 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1655 queue_regulatory_request(request
);
1661 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1663 struct regulatory_request
*request
;
1668 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1672 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1674 /* Must have registered wiphy first */
1675 BUG_ON(!wiphy_idx_valid(request
->wiphy_idx
));
1677 request
->alpha2
[0] = alpha2
[0];
1678 request
->alpha2
[1] = alpha2
[1];
1679 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1681 queue_regulatory_request(request
);
1685 EXPORT_SYMBOL(regulatory_hint
);
1688 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1689 * therefore cannot iterate over the rdev list here.
1691 void regulatory_hint_11d(struct wiphy
*wiphy
,
1692 enum ieee80211_band band
,
1697 enum environment_cap env
= ENVIRON_ANY
;
1698 struct regulatory_request
*request
;
1700 mutex_lock(®_mutex
);
1702 if (unlikely(!last_request
))
1705 /* IE len must be evenly divisible by 2 */
1706 if (country_ie_len
& 0x01)
1709 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1712 alpha2
[0] = country_ie
[0];
1713 alpha2
[1] = country_ie
[1];
1715 if (country_ie
[2] == 'I')
1716 env
= ENVIRON_INDOOR
;
1717 else if (country_ie
[2] == 'O')
1718 env
= ENVIRON_OUTDOOR
;
1721 * We will run this only upon a successful connection on cfg80211.
1722 * We leave conflict resolution to the workqueue, where can hold
1725 if (likely(last_request
->initiator
==
1726 NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1727 wiphy_idx_valid(last_request
->wiphy_idx
)))
1730 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1734 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1735 request
->alpha2
[0] = alpha2
[0];
1736 request
->alpha2
[1] = alpha2
[1];
1737 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1738 request
->country_ie_env
= env
;
1740 mutex_unlock(®_mutex
);
1742 queue_regulatory_request(request
);
1747 mutex_unlock(®_mutex
);
1750 static void restore_alpha2(char *alpha2
, bool reset_user
)
1752 /* indicates there is no alpha2 to consider for restoration */
1756 /* The user setting has precedence over the module parameter */
1757 if (is_user_regdom_saved()) {
1758 /* Unless we're asked to ignore it and reset it */
1760 REG_DBG_PRINT("Restoring regulatory settings "
1761 "including user preference\n");
1762 user_alpha2
[0] = '9';
1763 user_alpha2
[1] = '7';
1766 * If we're ignoring user settings, we still need to
1767 * check the module parameter to ensure we put things
1768 * back as they were for a full restore.
1770 if (!is_world_regdom(ieee80211_regdom
)) {
1771 REG_DBG_PRINT("Keeping preference on "
1772 "module parameter ieee80211_regdom: %c%c\n",
1773 ieee80211_regdom
[0],
1774 ieee80211_regdom
[1]);
1775 alpha2
[0] = ieee80211_regdom
[0];
1776 alpha2
[1] = ieee80211_regdom
[1];
1779 REG_DBG_PRINT("Restoring regulatory settings "
1780 "while preserving user preference for: %c%c\n",
1783 alpha2
[0] = user_alpha2
[0];
1784 alpha2
[1] = user_alpha2
[1];
1786 } else if (!is_world_regdom(ieee80211_regdom
)) {
1787 REG_DBG_PRINT("Keeping preference on "
1788 "module parameter ieee80211_regdom: %c%c\n",
1789 ieee80211_regdom
[0],
1790 ieee80211_regdom
[1]);
1791 alpha2
[0] = ieee80211_regdom
[0];
1792 alpha2
[1] = ieee80211_regdom
[1];
1794 REG_DBG_PRINT("Restoring regulatory settings\n");
1797 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1799 struct ieee80211_supported_band
*sband
;
1800 enum ieee80211_band band
;
1801 struct ieee80211_channel
*chan
;
1804 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1805 sband
= wiphy
->bands
[band
];
1808 for (i
= 0; i
< sband
->n_channels
; i
++) {
1809 chan
= &sband
->channels
[i
];
1810 chan
->flags
= chan
->orig_flags
;
1811 chan
->max_antenna_gain
= chan
->orig_mag
;
1812 chan
->max_power
= chan
->orig_mpwr
;
1818 * Restoring regulatory settings involves ingoring any
1819 * possibly stale country IE information and user regulatory
1820 * settings if so desired, this includes any beacon hints
1821 * learned as we could have traveled outside to another country
1822 * after disconnection. To restore regulatory settings we do
1823 * exactly what we did at bootup:
1825 * - send a core regulatory hint
1826 * - send a user regulatory hint if applicable
1828 * Device drivers that send a regulatory hint for a specific country
1829 * keep their own regulatory domain on wiphy->regd so that does does
1830 * not need to be remembered.
1832 static void restore_regulatory_settings(bool reset_user
)
1835 char world_alpha2
[2];
1836 struct reg_beacon
*reg_beacon
, *btmp
;
1837 struct regulatory_request
*reg_request
, *tmp
;
1838 LIST_HEAD(tmp_reg_req_list
);
1839 struct cfg80211_registered_device
*rdev
;
1841 mutex_lock(&cfg80211_mutex
);
1842 mutex_lock(®_mutex
);
1844 reset_regdomains(true);
1845 restore_alpha2(alpha2
, reset_user
);
1848 * If there's any pending requests we simply
1849 * stash them to a temporary pending queue and
1850 * add then after we've restored regulatory
1853 spin_lock(®_requests_lock
);
1854 if (!list_empty(®_requests_list
)) {
1855 list_for_each_entry_safe(reg_request
, tmp
,
1856 ®_requests_list
, list
) {
1857 if (reg_request
->initiator
!=
1858 NL80211_REGDOM_SET_BY_USER
)
1860 list_del(®_request
->list
);
1861 list_add_tail(®_request
->list
, &tmp_reg_req_list
);
1864 spin_unlock(®_requests_lock
);
1866 /* Clear beacon hints */
1867 spin_lock_bh(®_pending_beacons_lock
);
1868 if (!list_empty(®_pending_beacons
)) {
1869 list_for_each_entry_safe(reg_beacon
, btmp
,
1870 ®_pending_beacons
, list
) {
1871 list_del(®_beacon
->list
);
1875 spin_unlock_bh(®_pending_beacons_lock
);
1877 if (!list_empty(®_beacon_list
)) {
1878 list_for_each_entry_safe(reg_beacon
, btmp
,
1879 ®_beacon_list
, list
) {
1880 list_del(®_beacon
->list
);
1885 /* First restore to the basic regulatory settings */
1886 cfg80211_regdomain
= cfg80211_world_regdom
;
1887 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1888 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1890 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1891 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1892 restore_custom_reg_settings(&rdev
->wiphy
);
1895 mutex_unlock(®_mutex
);
1896 mutex_unlock(&cfg80211_mutex
);
1898 regulatory_hint_core(world_alpha2
);
1901 * This restores the ieee80211_regdom module parameter
1902 * preference or the last user requested regulatory
1903 * settings, user regulatory settings takes precedence.
1905 if (is_an_alpha2(alpha2
))
1906 regulatory_hint_user(user_alpha2
);
1908 if (list_empty(&tmp_reg_req_list
))
1911 mutex_lock(&cfg80211_mutex
);
1912 mutex_lock(®_mutex
);
1914 spin_lock(®_requests_lock
);
1915 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
1916 REG_DBG_PRINT("Adding request for country %c%c back "
1918 reg_request
->alpha2
[0],
1919 reg_request
->alpha2
[1]);
1920 list_del(®_request
->list
);
1921 list_add_tail(®_request
->list
, ®_requests_list
);
1923 spin_unlock(®_requests_lock
);
1925 mutex_unlock(®_mutex
);
1926 mutex_unlock(&cfg80211_mutex
);
1928 REG_DBG_PRINT("Kicking the queue\n");
1930 schedule_work(®_work
);
1933 void regulatory_hint_disconnect(void)
1935 REG_DBG_PRINT("All devices are disconnected, going to "
1936 "restore regulatory settings\n");
1937 restore_regulatory_settings(false);
1940 static bool freq_is_chan_12_13_14(u16 freq
)
1942 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
1943 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
1944 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
1949 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
1950 struct ieee80211_channel
*beacon_chan
,
1953 struct reg_beacon
*reg_beacon
;
1955 if (likely((beacon_chan
->beacon_found
||
1956 (beacon_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
1957 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
1958 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))))
1961 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
1965 REG_DBG_PRINT("Found new beacon on "
1966 "frequency: %d MHz (Ch %d) on %s\n",
1967 beacon_chan
->center_freq
,
1968 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
1971 memcpy(®_beacon
->chan
, beacon_chan
,
1972 sizeof(struct ieee80211_channel
));
1976 * Since we can be called from BH or and non-BH context
1977 * we must use spin_lock_bh()
1979 spin_lock_bh(®_pending_beacons_lock
);
1980 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
1981 spin_unlock_bh(®_pending_beacons_lock
);
1983 schedule_work(®_work
);
1988 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
1991 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1992 const struct ieee80211_freq_range
*freq_range
= NULL
;
1993 const struct ieee80211_power_rule
*power_rule
= NULL
;
1995 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
1997 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1998 reg_rule
= &rd
->reg_rules
[i
];
1999 freq_range
= ®_rule
->freq_range
;
2000 power_rule
= ®_rule
->power_rule
;
2003 * There may not be documentation for max antenna gain
2004 * in certain regions
2006 if (power_rule
->max_antenna_gain
)
2007 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2008 freq_range
->start_freq_khz
,
2009 freq_range
->end_freq_khz
,
2010 freq_range
->max_bandwidth_khz
,
2011 power_rule
->max_antenna_gain
,
2012 power_rule
->max_eirp
);
2014 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2015 freq_range
->start_freq_khz
,
2016 freq_range
->end_freq_khz
,
2017 freq_range
->max_bandwidth_khz
,
2018 power_rule
->max_eirp
);
2022 bool reg_supported_dfs_region(u8 dfs_region
)
2024 switch (dfs_region
) {
2025 case NL80211_DFS_UNSET
:
2026 case NL80211_DFS_FCC
:
2027 case NL80211_DFS_ETSI
:
2028 case NL80211_DFS_JP
:
2031 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2037 static void print_dfs_region(u8 dfs_region
)
2042 switch (dfs_region
) {
2043 case NL80211_DFS_FCC
:
2044 pr_info(" DFS Master region FCC");
2046 case NL80211_DFS_ETSI
:
2047 pr_info(" DFS Master region ETSI");
2049 case NL80211_DFS_JP
:
2050 pr_info(" DFS Master region JP");
2053 pr_info(" DFS Master region Uknown");
2058 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2061 if (is_intersected_alpha2(rd
->alpha2
)) {
2063 if (last_request
->initiator
==
2064 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2065 struct cfg80211_registered_device
*rdev
;
2066 rdev
= cfg80211_rdev_by_wiphy_idx(
2067 last_request
->wiphy_idx
);
2069 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2070 rdev
->country_ie_alpha2
[0],
2071 rdev
->country_ie_alpha2
[1]);
2073 pr_info("Current regulatory domain intersected:\n");
2075 pr_info("Current regulatory domain intersected:\n");
2076 } else if (is_world_regdom(rd
->alpha2
))
2077 pr_info("World regulatory domain updated:\n");
2079 if (is_unknown_alpha2(rd
->alpha2
))
2080 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2082 pr_info("Regulatory domain changed to country: %c%c\n",
2083 rd
->alpha2
[0], rd
->alpha2
[1]);
2085 print_dfs_region(rd
->dfs_region
);
2089 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2091 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2095 /* Takes ownership of rd only if it doesn't fail */
2096 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2098 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2099 struct cfg80211_registered_device
*rdev
= NULL
;
2100 struct wiphy
*request_wiphy
;
2101 /* Some basic sanity checks first */
2103 if (is_world_regdom(rd
->alpha2
)) {
2104 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2106 update_world_regdomain(rd
);
2110 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2111 !is_unknown_alpha2(rd
->alpha2
))
2118 * Lets only bother proceeding on the same alpha2 if the current
2119 * rd is non static (it means CRDA was present and was used last)
2120 * and the pending request came in from a country IE
2122 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2124 * If someone else asked us to change the rd lets only bother
2125 * checking if the alpha2 changes if CRDA was already called
2127 if (!regdom_changes(rd
->alpha2
))
2132 * Now lets set the regulatory domain, update all driver channels
2133 * and finally inform them of what we have done, in case they want
2134 * to review or adjust their own settings based on their own
2135 * internal EEPROM data
2138 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2141 if (!is_valid_rd(rd
)) {
2142 pr_err("Invalid regulatory domain detected:\n");
2143 print_regdomain_info(rd
);
2147 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2148 if (!request_wiphy
&&
2149 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2150 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2151 schedule_delayed_work(®_timeout
, 0);
2155 if (!last_request
->intersect
) {
2158 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2159 reset_regdomains(false);
2160 cfg80211_regdomain
= rd
;
2165 * For a driver hint, lets copy the regulatory domain the
2166 * driver wanted to the wiphy to deal with conflicts
2170 * Userspace could have sent two replies with only
2171 * one kernel request.
2173 if (request_wiphy
->regd
)
2176 r
= reg_copy_regd(&request_wiphy
->regd
, rd
);
2180 reset_regdomains(false);
2181 cfg80211_regdomain
= rd
;
2185 /* Intersection requires a bit more work */
2187 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2189 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2190 if (!intersected_rd
)
2194 * We can trash what CRDA provided now.
2195 * However if a driver requested this specific regulatory
2196 * domain we keep it for its private use
2198 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2199 request_wiphy
->regd
= rd
;
2205 reset_regdomains(false);
2206 cfg80211_regdomain
= intersected_rd
;
2211 if (!intersected_rd
)
2214 rdev
= wiphy_to_dev(request_wiphy
);
2216 rdev
->country_ie_alpha2
[0] = rd
->alpha2
[0];
2217 rdev
->country_ie_alpha2
[1] = rd
->alpha2
[1];
2218 rdev
->env
= last_request
->country_ie_env
;
2220 BUG_ON(intersected_rd
== rd
);
2225 reset_regdomains(false);
2226 cfg80211_regdomain
= intersected_rd
;
2233 * Use this call to set the current regulatory domain. Conflicts with
2234 * multiple drivers can be ironed out later. Caller must've already
2235 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2237 int set_regdom(const struct ieee80211_regdomain
*rd
)
2241 assert_cfg80211_lock();
2243 mutex_lock(®_mutex
);
2245 /* Note that this doesn't update the wiphys, this is done below */
2246 r
= __set_regdom(rd
);
2249 mutex_unlock(®_mutex
);
2253 /* This would make this whole thing pointless */
2254 if (!last_request
->intersect
)
2255 BUG_ON(rd
!= cfg80211_regdomain
);
2257 /* update all wiphys now with the new established regulatory domain */
2258 update_all_wiphy_regulatory(last_request
->initiator
);
2260 print_regdomain(cfg80211_regdomain
);
2262 nl80211_send_reg_change_event(last_request
);
2264 reg_set_request_processed();
2266 mutex_unlock(®_mutex
);
2271 #ifdef CONFIG_HOTPLUG
2272 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2274 if (last_request
&& !last_request
->processed
) {
2275 if (add_uevent_var(env
, "COUNTRY=%c%c",
2276 last_request
->alpha2
[0],
2277 last_request
->alpha2
[1]))
2284 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2288 #endif /* CONFIG_HOTPLUG */
2290 /* Caller must hold cfg80211_mutex */
2291 void reg_device_remove(struct wiphy
*wiphy
)
2293 struct wiphy
*request_wiphy
= NULL
;
2295 assert_cfg80211_lock();
2297 mutex_lock(®_mutex
);
2302 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2304 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2307 last_request
->wiphy_idx
= WIPHY_IDX_STALE
;
2308 last_request
->country_ie_env
= ENVIRON_ANY
;
2310 mutex_unlock(®_mutex
);
2313 static void reg_timeout_work(struct work_struct
*work
)
2315 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2316 "restoring regulatory settings\n");
2317 restore_regulatory_settings(true);
2320 int __init
regulatory_init(void)
2324 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2325 if (IS_ERR(reg_pdev
))
2326 return PTR_ERR(reg_pdev
);
2328 reg_pdev
->dev
.type
= ®_device_type
;
2330 spin_lock_init(®_requests_lock
);
2331 spin_lock_init(®_pending_beacons_lock
);
2333 reg_regdb_size_check();
2335 cfg80211_regdomain
= cfg80211_world_regdom
;
2337 user_alpha2
[0] = '9';
2338 user_alpha2
[1] = '7';
2340 /* We always try to get an update for the static regdomain */
2341 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2346 * N.B. kobject_uevent_env() can fail mainly for when we're out
2347 * memory which is handled and propagated appropriately above
2348 * but it can also fail during a netlink_broadcast() or during
2349 * early boot for call_usermodehelper(). For now treat these
2350 * errors as non-fatal.
2352 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2353 #ifdef CONFIG_CFG80211_REG_DEBUG
2354 /* We want to find out exactly why when debugging */
2360 * Finally, if the user set the module parameter treat it
2363 if (!is_world_regdom(ieee80211_regdom
))
2364 regulatory_hint_user(ieee80211_regdom
);
2369 void /* __init_or_exit */ regulatory_exit(void)
2371 struct regulatory_request
*reg_request
, *tmp
;
2372 struct reg_beacon
*reg_beacon
, *btmp
;
2374 cancel_work_sync(®_work
);
2375 cancel_delayed_work_sync(®_timeout
);
2377 mutex_lock(&cfg80211_mutex
);
2378 mutex_lock(®_mutex
);
2380 reset_regdomains(true);
2382 dev_set_uevent_suppress(®_pdev
->dev
, true);
2384 platform_device_unregister(reg_pdev
);
2386 spin_lock_bh(®_pending_beacons_lock
);
2387 if (!list_empty(®_pending_beacons
)) {
2388 list_for_each_entry_safe(reg_beacon
, btmp
,
2389 ®_pending_beacons
, list
) {
2390 list_del(®_beacon
->list
);
2394 spin_unlock_bh(®_pending_beacons_lock
);
2396 if (!list_empty(®_beacon_list
)) {
2397 list_for_each_entry_safe(reg_beacon
, btmp
,
2398 ®_beacon_list
, list
) {
2399 list_del(®_beacon
->list
);
2404 spin_lock(®_requests_lock
);
2405 if (!list_empty(®_requests_list
)) {
2406 list_for_each_entry_safe(reg_request
, tmp
,
2407 ®_requests_list
, list
) {
2408 list_del(®_request
->list
);
2412 spin_unlock(®_requests_lock
);
2414 mutex_unlock(®_mutex
);
2415 mutex_unlock(&cfg80211_mutex
);