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authorLuis R. Rodriguez <lrodriguez@atheros.com>2009-02-21 00:04:31 -0500
committerJohn W. Linville <linville@tuxdriver.com>2009-02-27 14:52:57 -0500
commitfb1fc7add5d205c1db2fa323af1367c3cd4dced2 (patch)
treefceea0a9a78d46301a76710a156a22f37dab8ba4 /net/wireless/reg.c
parentfe33eb390854886e1fd5d4835d833b80d145aafb (diff)
cfg80211: comments style cleanup
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/reg.c')
-rw-r--r--net/wireless/reg.c299
1 files changed, 199 insertions, 100 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 0b8c4b86789a..7ecb9033ad42 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -54,14 +54,18 @@ static u32 supported_bandwidths[] = {
54 MHZ_TO_KHZ(20), 54 MHZ_TO_KHZ(20),
55}; 55};
56 56
57/* Central wireless core regulatory domains, we only need two, 57/*
58 * Central wireless core regulatory domains, we only need two,
58 * the current one and a world regulatory domain in case we have no 59 * the current one and a world regulatory domain in case we have no
59 * information to give us an alpha2 */ 60 * information to give us an alpha2
61 */
60const struct ieee80211_regdomain *cfg80211_regdomain; 62const struct ieee80211_regdomain *cfg80211_regdomain;
61 63
62/* We use this as a place for the rd structure built from the 64/*
65 * We use this as a place for the rd structure built from the
63 * last parsed country IE to rest until CRDA gets back to us with 66 * last parsed country IE to rest until CRDA gets back to us with
64 * what it thinks should apply for the same country */ 67 * what it thinks should apply for the same country
68 */
65static const struct ieee80211_regdomain *country_ie_regdomain; 69static const struct ieee80211_regdomain *country_ie_regdomain;
66 70
67static LIST_HEAD(reg_requests_list); 71static LIST_HEAD(reg_requests_list);
@@ -86,9 +90,11 @@ static char *ieee80211_regdom = "US";
86module_param(ieee80211_regdom, charp, 0444); 90module_param(ieee80211_regdom, charp, 0444);
87MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 91MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
88 92
89/* We assume 40 MHz bandwidth for the old regulatory work. 93/*
94 * We assume 40 MHz bandwidth for the old regulatory work.
90 * We make emphasis we are using the exact same frequencies 95 * We make emphasis we are using the exact same frequencies
91 * as before */ 96 * as before
97 */
92 98
93static const struct ieee80211_regdomain us_regdom = { 99static const struct ieee80211_regdomain us_regdom = {
94 .n_reg_rules = 6, 100 .n_reg_rules = 6,
@@ -127,8 +133,10 @@ static const struct ieee80211_regdomain jp_regdom = {
127 133
128static const struct ieee80211_regdomain eu_regdom = { 134static const struct ieee80211_regdomain eu_regdom = {
129 .n_reg_rules = 6, 135 .n_reg_rules = 6,
130 /* This alpha2 is bogus, we leave it here just for stupid 136 /*
131 * backward compatibility */ 137 * This alpha2 is bogus, we leave it here just for stupid
138 * backward compatibility
139 */
132 .alpha2 = "EU", 140 .alpha2 = "EU",
133 .reg_rules = { 141 .reg_rules = {
134 /* IEEE 802.11b/g, channels 1..13 */ 142 /* IEEE 802.11b/g, channels 1..13 */
@@ -197,8 +205,10 @@ static void reset_regdomains(void)
197 cfg80211_regdomain = NULL; 205 cfg80211_regdomain = NULL;
198} 206}
199 207
200/* Dynamic world regulatory domain requested by the wireless 208/*
201 * core upon initialization */ 209 * Dynamic world regulatory domain requested by the wireless
210 * core upon initialization
211 */
202static void update_world_regdomain(const struct ieee80211_regdomain *rd) 212static void update_world_regdomain(const struct ieee80211_regdomain *rd)
203{ 213{
204 BUG_ON(!last_request); 214 BUG_ON(!last_request);
@@ -239,8 +249,10 @@ static bool is_unknown_alpha2(const char *alpha2)
239{ 249{
240 if (!alpha2) 250 if (!alpha2)
241 return false; 251 return false;
242 /* Special case where regulatory domain was built by driver 252 /*
243 * but a specific alpha2 cannot be determined */ 253 * Special case where regulatory domain was built by driver
254 * but a specific alpha2 cannot be determined
255 */
244 if (alpha2[0] == '9' && alpha2[1] == '9') 256 if (alpha2[0] == '9' && alpha2[1] == '9')
245 return true; 257 return true;
246 return false; 258 return false;
@@ -250,9 +262,11 @@ static bool is_intersected_alpha2(const char *alpha2)
250{ 262{
251 if (!alpha2) 263 if (!alpha2)
252 return false; 264 return false;
253 /* Special case where regulatory domain is the 265 /*
266 * Special case where regulatory domain is the
254 * result of an intersection between two regulatory domain 267 * result of an intersection between two regulatory domain
255 * structures */ 268 * structures
269 */
256 if (alpha2[0] == '9' && alpha2[1] == '8') 270 if (alpha2[0] == '9' && alpha2[1] == '8')
257 return true; 271 return true;
258 return false; 272 return false;
@@ -307,8 +321,10 @@ static bool country_ie_integrity_changes(u32 checksum)
307 return false; 321 return false;
308} 322}
309 323
310/* This lets us keep regulatory code which is updated on a regulatory 324/*
311 * basis in userspace. */ 325 * This lets us keep regulatory code which is updated on a regulatory
326 * basis in userspace.
327 */
312static int call_crda(const char *alpha2) 328static int call_crda(const char *alpha2)
313{ 329{
314 char country_env[9 + 2] = "COUNTRY="; 330 char country_env[9 + 2] = "COUNTRY=";
@@ -419,10 +435,12 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
419#undef ONE_GHZ_IN_KHZ 435#undef ONE_GHZ_IN_KHZ
420} 436}
421 437
422/* Converts a country IE to a regulatory domain. A regulatory domain 438/*
439 * Converts a country IE to a regulatory domain. A regulatory domain
423 * structure has a lot of information which the IE doesn't yet have, 440 * structure has a lot of information which the IE doesn't yet have,
424 * so for the other values we use upper max values as we will intersect 441 * so for the other values we use upper max values as we will intersect
425 * with our userspace regulatory agent to get lower bounds. */ 442 * with our userspace regulatory agent to get lower bounds.
443 */
426static struct ieee80211_regdomain *country_ie_2_rd( 444static struct ieee80211_regdomain *country_ie_2_rd(
427 u8 *country_ie, 445 u8 *country_ie,
428 u8 country_ie_len, 446 u8 country_ie_len,
@@ -467,9 +485,11 @@ static struct ieee80211_regdomain *country_ie_2_rd(
467 485
468 *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 486 *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8);
469 487
470 /* We need to build a reg rule for each triplet, but first we must 488 /*
489 * We need to build a reg rule for each triplet, but first we must
471 * calculate the number of reg rules we will need. We will need one 490 * calculate the number of reg rules we will need. We will need one
472 * for each channel subband */ 491 * for each channel subband
492 */
473 while (country_ie_len >= 3) { 493 while (country_ie_len >= 3) {
474 int end_channel = 0; 494 int end_channel = 0;
475 struct ieee80211_country_ie_triplet *triplet = 495 struct ieee80211_country_ie_triplet *triplet =
@@ -507,9 +527,11 @@ static struct ieee80211_regdomain *country_ie_2_rd(
507 if (cur_sub_max_channel < cur_channel) 527 if (cur_sub_max_channel < cur_channel)
508 return NULL; 528 return NULL;
509 529
510 /* Do not allow overlapping channels. Also channels 530 /*
531 * Do not allow overlapping channels. Also channels
511 * passed in each subband must be monotonically 532 * passed in each subband must be monotonically
512 * increasing */ 533 * increasing
534 */
513 if (last_sub_max_channel) { 535 if (last_sub_max_channel) {
514 if (cur_channel <= last_sub_max_channel) 536 if (cur_channel <= last_sub_max_channel)
515 return NULL; 537 return NULL;
@@ -517,10 +539,12 @@ static struct ieee80211_regdomain *country_ie_2_rd(
517 return NULL; 539 return NULL;
518 } 540 }
519 541
520 /* When dot11RegulatoryClassesRequired is supported 542 /*
543 * When dot11RegulatoryClassesRequired is supported
521 * we can throw ext triplets as part of this soup, 544 * we can throw ext triplets as part of this soup,
522 * for now we don't care when those change as we 545 * for now we don't care when those change as we
523 * don't support them */ 546 * don't support them
547 */
524 *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 548 *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) |
525 ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 549 ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) |
526 ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 550 ((triplet->chans.max_power ^ cur_sub_max_channel) << 24);
@@ -531,8 +555,10 @@ static struct ieee80211_regdomain *country_ie_2_rd(
531 country_ie_len -= 3; 555 country_ie_len -= 3;
532 num_rules++; 556 num_rules++;
533 557
534 /* Note: this is not a IEEE requirement but 558 /*
535 * simply a memory requirement */ 559 * Note: this is not a IEEE requirement but
560 * simply a memory requirement
561 */
536 if (num_rules > NL80211_MAX_SUPP_REG_RULES) 562 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
537 return NULL; 563 return NULL;
538 } 564 }
@@ -560,8 +586,10 @@ static struct ieee80211_regdomain *country_ie_2_rd(
560 struct ieee80211_freq_range *freq_range = NULL; 586 struct ieee80211_freq_range *freq_range = NULL;
561 struct ieee80211_power_rule *power_rule = NULL; 587 struct ieee80211_power_rule *power_rule = NULL;
562 588
563 /* Must parse if dot11RegulatoryClassesRequired is true, 589 /*
564 * we don't support this yet */ 590 * Must parse if dot11RegulatoryClassesRequired is true,
591 * we don't support this yet
592 */
565 if (triplet->ext.reg_extension_id >= 593 if (triplet->ext.reg_extension_id >=
566 IEEE80211_COUNTRY_EXTENSION_ID) { 594 IEEE80211_COUNTRY_EXTENSION_ID) {
567 country_ie += 3; 595 country_ie += 3;
@@ -583,10 +611,12 @@ static struct ieee80211_regdomain *country_ie_2_rd(
583 end_channel = triplet->chans.first_channel + 611 end_channel = triplet->chans.first_channel +
584 (4 * (triplet->chans.num_channels - 1)); 612 (4 * (triplet->chans.num_channels - 1));
585 613
586 /* The +10 is since the regulatory domain expects 614 /*
615 * The +10 is since the regulatory domain expects
587 * the actual band edge, not the center of freq for 616 * the actual band edge, not the center of freq for
588 * its start and end freqs, assuming 20 MHz bandwidth on 617 * its start and end freqs, assuming 20 MHz bandwidth on
589 * the channels passed */ 618 * the channels passed
619 */
590 freq_range->start_freq_khz = 620 freq_range->start_freq_khz =
591 MHZ_TO_KHZ(ieee80211_channel_to_frequency( 621 MHZ_TO_KHZ(ieee80211_channel_to_frequency(
592 triplet->chans.first_channel) - 10); 622 triplet->chans.first_channel) - 10);
@@ -594,9 +624,11 @@ static struct ieee80211_regdomain *country_ie_2_rd(
594 MHZ_TO_KHZ(ieee80211_channel_to_frequency( 624 MHZ_TO_KHZ(ieee80211_channel_to_frequency(
595 end_channel) + 10); 625 end_channel) + 10);
596 626
597 /* Large arbitrary values, we intersect later */ 627 /*
598 /* Increment this if we ever support >= 40 MHz channels 628 * These are large arbitrary values we use to intersect later.
599 * in IEEE 802.11 */ 629 * Increment this if we ever support >= 40 MHz channels
630 * in IEEE 802.11
631 */
600 freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 632 freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40);
601 power_rule->max_antenna_gain = DBI_TO_MBI(100); 633 power_rule->max_antenna_gain = DBI_TO_MBI(100);
602 power_rule->max_eirp = DBM_TO_MBM(100); 634 power_rule->max_eirp = DBM_TO_MBM(100);
@@ -612,8 +644,10 @@ static struct ieee80211_regdomain *country_ie_2_rd(
612} 644}
613 645
614 646
615/* Helper for regdom_intersect(), this does the real 647/*
616 * mathematical intersection fun */ 648 * Helper for regdom_intersect(), this does the real
649 * mathematical intersection fun
650 */
617static int reg_rules_intersect( 651static int reg_rules_intersect(
618 const struct ieee80211_reg_rule *rule1, 652 const struct ieee80211_reg_rule *rule1,
619 const struct ieee80211_reg_rule *rule2, 653 const struct ieee80211_reg_rule *rule2,
@@ -691,11 +725,13 @@ static struct ieee80211_regdomain *regdom_intersect(
691 if (!rd1 || !rd2) 725 if (!rd1 || !rd2)
692 return NULL; 726 return NULL;
693 727
694 /* First we get a count of the rules we'll need, then we actually 728 /*
729 * First we get a count of the rules we'll need, then we actually
695 * build them. This is to so we can malloc() and free() a 730 * build them. This is to so we can malloc() and free() a
696 * regdomain once. The reason we use reg_rules_intersect() here 731 * regdomain once. The reason we use reg_rules_intersect() here
697 * is it will return -EINVAL if the rule computed makes no sense. 732 * is it will return -EINVAL if the rule computed makes no sense.
698 * All rules that do check out OK are valid. */ 733 * All rules that do check out OK are valid.
734 */
699 735
700 for (x = 0; x < rd1->n_reg_rules; x++) { 736 for (x = 0; x < rd1->n_reg_rules; x++) {
701 rule1 = &rd1->reg_rules[x]; 737 rule1 = &rd1->reg_rules[x];
@@ -723,14 +759,18 @@ static struct ieee80211_regdomain *regdom_intersect(
723 rule1 = &rd1->reg_rules[x]; 759 rule1 = &rd1->reg_rules[x];
724 for (y = 0; y < rd2->n_reg_rules; y++) { 760 for (y = 0; y < rd2->n_reg_rules; y++) {
725 rule2 = &rd2->reg_rules[y]; 761 rule2 = &rd2->reg_rules[y];
726 /* This time around instead of using the stack lets 762 /*
763 * This time around instead of using the stack lets
727 * write to the target rule directly saving ourselves 764 * write to the target rule directly saving ourselves
728 * a memcpy() */ 765 * a memcpy()
766 */
729 intersected_rule = &rd->reg_rules[rule_idx]; 767 intersected_rule = &rd->reg_rules[rule_idx];
730 r = reg_rules_intersect(rule1, rule2, 768 r = reg_rules_intersect(rule1, rule2,
731 intersected_rule); 769 intersected_rule);
732 /* No need to memset here the intersected rule here as 770 /*
733 * we're not using the stack anymore */ 771 * No need to memset here the intersected rule here as
772 * we're not using the stack anymore
773 */
734 if (r) 774 if (r)
735 continue; 775 continue;
736 rule_idx++; 776 rule_idx++;
@@ -749,8 +789,10 @@ static struct ieee80211_regdomain *regdom_intersect(
749 return rd; 789 return rd;
750} 790}
751 791
752/* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 792/*
753 * want to just have the channel structure use these */ 793 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
794 * want to just have the channel structure use these
795 */
754static u32 map_regdom_flags(u32 rd_flags) 796static u32 map_regdom_flags(u32 rd_flags)
755{ 797{
756 u32 channel_flags = 0; 798 u32 channel_flags = 0;
@@ -776,8 +818,10 @@ static int freq_reg_info_regd(struct wiphy *wiphy,
776 818
777 regd = custom_regd ? custom_regd : cfg80211_regdomain; 819 regd = custom_regd ? custom_regd : cfg80211_regdomain;
778 820
779 /* Follow the driver's regulatory domain, if present, unless a country 821 /*
780 * IE has been processed or a user wants to help complaince further */ 822 * Follow the driver's regulatory domain, if present, unless a country
823 * IE has been processed or a user wants to help complaince further
824 */
781 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && 825 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE &&
782 last_request->initiator != REGDOM_SET_BY_USER && 826 last_request->initiator != REGDOM_SET_BY_USER &&
783 wiphy->regd) 827 wiphy->regd)
@@ -795,9 +839,11 @@ static int freq_reg_info_regd(struct wiphy *wiphy,
795 fr = &rr->freq_range; 839 fr = &rr->freq_range;
796 pr = &rr->power_rule; 840 pr = &rr->power_rule;
797 841
798 /* We only need to know if one frequency rule was 842 /*
843 * We only need to know if one frequency rule was
799 * was in center_freq's band, that's enough, so lets 844 * was in center_freq's band, that's enough, so lets
800 * not overwrite it once found */ 845 * not overwrite it once found
846 */
801 if (!band_rule_found) 847 if (!band_rule_found)
802 band_rule_found = freq_in_rule_band(fr, center_freq); 848 band_rule_found = freq_in_rule_band(fr, center_freq);
803 849
@@ -850,7 +896,8 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
850 &max_bandwidth, &reg_rule); 896 &max_bandwidth, &reg_rule);
851 897
852 if (r) { 898 if (r) {
853 /* This means no regulatory rule was found in the country IE 899 /*
900 * This means no regulatory rule was found in the country IE
854 * with a frequency range on the center_freq's band, since 901 * with a frequency range on the center_freq's band, since
855 * IEEE-802.11 allows for a country IE to have a subset of the 902 * IEEE-802.11 allows for a country IE to have a subset of the
856 * regulatory information provided in a country we ignore 903 * regulatory information provided in a country we ignore
@@ -869,8 +916,10 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
869 chan->center_freq, wiphy_name(wiphy)); 916 chan->center_freq, wiphy_name(wiphy));
870#endif 917#endif
871 } else { 918 } else {
872 /* In this case we know the country IE has at least one reg rule 919 /*
873 * for the band so we respect its band definitions */ 920 * In this case we know the country IE has at least one reg rule
921 * for the band so we respect its band definitions
922 */
874#ifdef CONFIG_CFG80211_REG_DEBUG 923#ifdef CONFIG_CFG80211_REG_DEBUG
875 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 924 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
876 printk(KERN_DEBUG "cfg80211: Disabling " 925 printk(KERN_DEBUG "cfg80211: Disabling "
@@ -889,9 +938,11 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
889 if (last_request->initiator == REGDOM_SET_BY_DRIVER && 938 if (last_request->initiator == REGDOM_SET_BY_DRIVER &&
890 request_wiphy && request_wiphy == wiphy && 939 request_wiphy && request_wiphy == wiphy &&
891 request_wiphy->strict_regulatory) { 940 request_wiphy->strict_regulatory) {
892 /* This gaurantees the driver's requested regulatory domain 941 /*
942 * This gaurantees the driver's requested regulatory domain
893 * will always be used as a base for further regulatory 943 * will always be used as a base for further regulatory
894 * settings */ 944 * settings
945 */
895 chan->flags = chan->orig_flags = 946 chan->flags = chan->orig_flags =
896 map_regdom_flags(reg_rule->flags); 947 map_regdom_flags(reg_rule->flags);
897 chan->max_antenna_gain = chan->orig_mag = 948 chan->max_antenna_gain = chan->orig_mag =
@@ -932,8 +983,10 @@ static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby)
932 if (setby == REGDOM_SET_BY_CORE && 983 if (setby == REGDOM_SET_BY_CORE &&
933 wiphy->custom_regulatory) 984 wiphy->custom_regulatory)
934 return true; 985 return true;
935 /* wiphy->regd will be set once the device has its own 986 /*
936 * desired regulatory domain set */ 987 * wiphy->regd will be set once the device has its own
988 * desired regulatory domain set
989 */
937 if (wiphy->strict_regulatory && !wiphy->regd && 990 if (wiphy->strict_regulatory && !wiphy->regd &&
938 !is_world_regdom(last_request->alpha2)) 991 !is_world_regdom(last_request->alpha2))
939 return true; 992 return true;
@@ -1043,8 +1096,10 @@ static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
1043 return 0; 1096 return 0;
1044} 1097}
1045 1098
1046/* Return value which can be used by ignore_request() to indicate 1099/*
1047 * it has been determined we should intersect two regulatory domains */ 1100 * Return value which can be used by ignore_request() to indicate
1101 * it has been determined we should intersect two regulatory domains
1102 */
1048#define REG_INTERSECT 1 1103#define REG_INTERSECT 1
1049 1104
1050/* This has the logic which determines when a new request 1105/* This has the logic which determines when a new request
@@ -1084,8 +1139,10 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
1084 return -EOPNOTSUPP; 1139 return -EOPNOTSUPP;
1085 return -EALREADY; 1140 return -EALREADY;
1086 } 1141 }
1087 /* Two consecutive Country IE hints on the same wiphy. 1142 /*
1088 * This should be picked up early by the driver/stack */ 1143 * Two consecutive Country IE hints on the same wiphy.
1144 * This should be picked up early by the driver/stack
1145 */
1089 if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2, 1146 if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2,
1090 alpha2))) 1147 alpha2)))
1091 return 0; 1148 return 0;
@@ -1104,13 +1161,17 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
1104 case REGDOM_SET_BY_USER: 1161 case REGDOM_SET_BY_USER:
1105 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 1162 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
1106 return REG_INTERSECT; 1163 return REG_INTERSECT;
1107 /* If the user knows better the user should set the regdom 1164 /*
1108 * to their country before the IE is picked up */ 1165 * If the user knows better the user should set the regdom
1166 * to their country before the IE is picked up
1167 */
1109 if (last_request->initiator == REGDOM_SET_BY_USER && 1168 if (last_request->initiator == REGDOM_SET_BY_USER &&
1110 last_request->intersect) 1169 last_request->intersect)
1111 return -EOPNOTSUPP; 1170 return -EOPNOTSUPP;
1112 /* Process user requests only after previous user/driver/core 1171 /*
1113 * requests have been processed */ 1172 * Process user requests only after previous user/driver/core
1173 * requests have been processed
1174 */
1114 if (last_request->initiator == REGDOM_SET_BY_CORE || 1175 if (last_request->initiator == REGDOM_SET_BY_CORE ||
1115 last_request->initiator == REGDOM_SET_BY_DRIVER || 1176 last_request->initiator == REGDOM_SET_BY_DRIVER ||
1116 last_request->initiator == REGDOM_SET_BY_USER) { 1177 last_request->initiator == REGDOM_SET_BY_USER) {
@@ -1151,9 +1212,11 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
1151 } 1212 }
1152 intersect = true; 1213 intersect = true;
1153 } else if (r) { 1214 } else if (r) {
1154 /* If the regulatory domain being requested by the 1215 /*
1216 * If the regulatory domain being requested by the
1155 * driver has already been set just copy it to the 1217 * driver has already been set just copy it to the
1156 * wiphy */ 1218 * wiphy
1219 */
1157 if (r == -EALREADY && set_by == REGDOM_SET_BY_DRIVER) { 1220 if (r == -EALREADY && set_by == REGDOM_SET_BY_DRIVER) {
1158 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1221 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
1159 if (r) 1222 if (r)
@@ -1363,9 +1426,11 @@ static bool reg_same_country_ie_hint(struct wiphy *wiphy,
1363 1426
1364 if (likely(request_wiphy != wiphy)) 1427 if (likely(request_wiphy != wiphy))
1365 return !country_ie_integrity_changes(country_ie_checksum); 1428 return !country_ie_integrity_changes(country_ie_checksum);
1366 /* We should not have let these through at this point, they 1429 /*
1430 * We should not have let these through at this point, they
1367 * should have been picked up earlier by the first alpha2 check 1431 * should have been picked up earlier by the first alpha2 check
1368 * on the device */ 1432 * on the device
1433 */
1369 if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 1434 if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum)))
1370 return true; 1435 return true;
1371 return false; 1436 return false;
@@ -1395,9 +1460,11 @@ void regulatory_hint_11d(struct wiphy *wiphy,
1395 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1460 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1396 goto out; 1461 goto out;
1397 1462
1398 /* Pending country IE processing, this can happen after we 1463 /*
1464 * Pending country IE processing, this can happen after we
1399 * call CRDA and wait for a response if a beacon was received before 1465 * call CRDA and wait for a response if a beacon was received before
1400 * we were able to process the last regulatory_hint_11d() call */ 1466 * we were able to process the last regulatory_hint_11d() call
1467 */
1401 if (country_ie_regdomain) 1468 if (country_ie_regdomain)
1402 goto out; 1469 goto out;
1403 1470
@@ -1409,34 +1476,44 @@ void regulatory_hint_11d(struct wiphy *wiphy,
1409 else if (country_ie[2] == 'O') 1476 else if (country_ie[2] == 'O')
1410 env = ENVIRON_OUTDOOR; 1477 env = ENVIRON_OUTDOOR;
1411 1478
1412 /* We will run this for *every* beacon processed for the BSSID, so 1479 /*
1480 * We will run this for *every* beacon processed for the BSSID, so
1413 * we optimize an early check to exit out early if we don't have to 1481 * we optimize an early check to exit out early if we don't have to
1414 * do anything */ 1482 * do anything
1483 */
1415 if (likely(wiphy_idx_valid(last_request->wiphy_idx))) { 1484 if (likely(wiphy_idx_valid(last_request->wiphy_idx))) {
1416 struct cfg80211_registered_device *drv_last_ie; 1485 struct cfg80211_registered_device *drv_last_ie;
1417 1486
1418 drv_last_ie = 1487 drv_last_ie =
1419 cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); 1488 cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx);
1420 1489
1421 /* Lets keep this simple -- we trust the first AP 1490 /*
1422 * after we intersect with CRDA */ 1491 * Lets keep this simple -- we trust the first AP
1492 * after we intersect with CRDA
1493 */
1423 if (likely(&drv_last_ie->wiphy == wiphy)) { 1494 if (likely(&drv_last_ie->wiphy == wiphy)) {
1424 /* Ignore IEs coming in on this wiphy with 1495 /*
1425 * the same alpha2 and environment cap */ 1496 * Ignore IEs coming in on this wiphy with
1497 * the same alpha2 and environment cap
1498 */
1426 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 1499 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
1427 alpha2) && 1500 alpha2) &&
1428 env == drv_last_ie->env)) { 1501 env == drv_last_ie->env)) {
1429 goto out; 1502 goto out;
1430 } 1503 }
1431 /* the wiphy moved on to another BSSID or the AP 1504 /*
1505 * the wiphy moved on to another BSSID or the AP
1432 * was reconfigured. XXX: We need to deal with the 1506 * was reconfigured. XXX: We need to deal with the
1433 * case where the user suspends and goes to goes 1507 * case where the user suspends and goes to goes
1434 * to another country, and then gets IEs from an 1508 * to another country, and then gets IEs from an
1435 * AP with different settings */ 1509 * AP with different settings
1510 */
1436 goto out; 1511 goto out;
1437 } else { 1512 } else {
1438 /* Ignore IEs coming in on two separate wiphys with 1513 /*
1439 * the same alpha2 and environment cap */ 1514 * Ignore IEs coming in on two separate wiphys with
1515 * the same alpha2 and environment cap
1516 */
1440 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 1517 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
1441 alpha2) && 1518 alpha2) &&
1442 env == drv_last_ie->env)) { 1519 env == drv_last_ie->env)) {
@@ -1467,8 +1544,10 @@ void regulatory_hint_11d(struct wiphy *wiphy,
1467 if (!request) 1544 if (!request)
1468 goto free_rd_out; 1545 goto free_rd_out;
1469 1546
1470 /* We keep this around for when CRDA comes back with a response so 1547 /*
1471 * we can intersect with that */ 1548 * We keep this around for when CRDA comes back with a response so
1549 * we can intersect with that
1550 */
1472 country_ie_regdomain = rd; 1551 country_ie_regdomain = rd;
1473 1552
1474 request->wiphy_idx = get_wiphy_idx(wiphy); 1553 request->wiphy_idx = get_wiphy_idx(wiphy);
@@ -1506,8 +1585,10 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd)
1506 freq_range = &reg_rule->freq_range; 1585 freq_range = &reg_rule->freq_range;
1507 power_rule = &reg_rule->power_rule; 1586 power_rule = &reg_rule->power_rule;
1508 1587
1509 /* There may not be documentation for max antenna gain 1588 /*
1510 * in certain regions */ 1589 * There may not be documentation for max antenna gain
1590 * in certain regions
1591 */
1511 if (power_rule->max_antenna_gain) 1592 if (power_rule->max_antenna_gain)
1512 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1593 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
1513 "(%d mBi, %d mBm)\n", 1594 "(%d mBi, %d mBm)\n",
@@ -1618,21 +1699,27 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
1618 if (!last_request) 1699 if (!last_request)
1619 return -EINVAL; 1700 return -EINVAL;
1620 1701
1621 /* Lets only bother proceeding on the same alpha2 if the current 1702 /*
1703 * Lets only bother proceeding on the same alpha2 if the current
1622 * rd is non static (it means CRDA was present and was used last) 1704 * rd is non static (it means CRDA was present and was used last)
1623 * and the pending request came in from a country IE */ 1705 * and the pending request came in from a country IE
1706 */
1624 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1707 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
1625 /* If someone else asked us to change the rd lets only bother 1708 /*
1626 * checking if the alpha2 changes if CRDA was already called */ 1709 * If someone else asked us to change the rd lets only bother
1710 * checking if the alpha2 changes if CRDA was already called
1711 */
1627 if (!is_old_static_regdom(cfg80211_regdomain) && 1712 if (!is_old_static_regdom(cfg80211_regdomain) &&
1628 !regdom_changed(rd->alpha2)) 1713 !regdom_changed(rd->alpha2))
1629 return -EINVAL; 1714 return -EINVAL;
1630 } 1715 }
1631 1716
1632 /* Now lets set the regulatory domain, update all driver channels 1717 /*
1718 * Now lets set the regulatory domain, update all driver channels
1633 * and finally inform them of what we have done, in case they want 1719 * and finally inform them of what we have done, in case they want
1634 * to review or adjust their own settings based on their own 1720 * to review or adjust their own settings based on their own
1635 * internal EEPROM data */ 1721 * internal EEPROM data
1722 */
1636 1723
1637 if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1724 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
1638 return -EINVAL; 1725 return -EINVAL;
@@ -1655,8 +1742,10 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
1655 return 0; 1742 return 0;
1656 } 1743 }
1657 1744
1658 /* For a driver hint, lets copy the regulatory domain the 1745 /*
1659 * driver wanted to the wiphy to deal with conflicts */ 1746 * For a driver hint, lets copy the regulatory domain the
1747 * driver wanted to the wiphy to deal with conflicts
1748 */
1660 1749
1661 BUG_ON(request_wiphy->regd); 1750 BUG_ON(request_wiphy->regd);
1662 1751
@@ -1677,9 +1766,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
1677 if (!intersected_rd) 1766 if (!intersected_rd)
1678 return -EINVAL; 1767 return -EINVAL;
1679 1768
1680 /* We can trash what CRDA provided now. 1769 /*
1770 * We can trash what CRDA provided now.
1681 * However if a driver requested this specific regulatory 1771 * However if a driver requested this specific regulatory
1682 * domain we keep it for its private use */ 1772 * domain we keep it for its private use
1773 */
1683 if (last_request->initiator == REGDOM_SET_BY_DRIVER) 1774 if (last_request->initiator == REGDOM_SET_BY_DRIVER)
1684 request_wiphy->regd = rd; 1775 request_wiphy->regd = rd;
1685 else 1776 else
@@ -1701,8 +1792,10 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
1701 BUG_ON(!country_ie_regdomain); 1792 BUG_ON(!country_ie_regdomain);
1702 1793
1703 if (rd != country_ie_regdomain) { 1794 if (rd != country_ie_regdomain) {
1704 /* Intersect what CRDA returned and our what we 1795 /*
1705 * had built from the Country IE received */ 1796 * Intersect what CRDA returned and our what we
1797 * had built from the Country IE received
1798 */
1706 1799
1707 intersected_rd = regdom_intersect(rd, country_ie_regdomain); 1800 intersected_rd = regdom_intersect(rd, country_ie_regdomain);
1708 1801
@@ -1712,9 +1805,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
1712 kfree(country_ie_regdomain); 1805 kfree(country_ie_regdomain);
1713 country_ie_regdomain = NULL; 1806 country_ie_regdomain = NULL;
1714 } else { 1807 } else {
1715 /* This would happen when CRDA was not present and 1808 /*
1809 * This would happen when CRDA was not present and
1716 * OLD_REGULATORY was enabled. We intersect our Country 1810 * OLD_REGULATORY was enabled. We intersect our Country
1717 * IE rd and what was set on cfg80211 originally */ 1811 * IE rd and what was set on cfg80211 originally
1812 */
1718 intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 1813 intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
1719 } 1814 }
1720 1815
@@ -1739,9 +1834,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
1739} 1834}
1740 1835
1741 1836
1742/* Use this call to set the current regulatory domain. Conflicts with 1837/*
1838 * Use this call to set the current regulatory domain. Conflicts with
1743 * multiple drivers can be ironed out later. Caller must've already 1839 * multiple drivers can be ironed out later. Caller must've already
1744 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex */ 1840 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
1841 */
1745int set_regdom(const struct ieee80211_regdomain *rd) 1842int set_regdom(const struct ieee80211_regdomain *rd)
1746{ 1843{
1747 int r; 1844 int r;
@@ -1800,10 +1897,12 @@ int regulatory_init(void)
1800 1897
1801 printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 1898 printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
1802 print_regdomain_info(cfg80211_regdomain); 1899 print_regdomain_info(cfg80211_regdomain);
1803 /* The old code still requests for a new regdomain and if 1900 /*
1901 * The old code still requests for a new regdomain and if
1804 * you have CRDA you get it updated, otherwise you get 1902 * you have CRDA you get it updated, otherwise you get
1805 * stuck with the static values. We ignore "EU" code as 1903 * stuck with the static values. We ignore "EU" code as
1806 * that is not a valid ISO / IEC 3166 alpha2 */ 1904 * that is not a valid ISO / IEC 3166 alpha2
1905 */
1807 if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') 1906 if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
1808 err = regulatory_hint_core(ieee80211_regdom); 1907 err = regulatory_hint_core(ieee80211_regdom);
1809#else 1908#else