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提交 fb1fc7ad 编写于 作者: L Luis R. Rodriguez 提交者： John W. Linville
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cfg80211: comments style cleanup 

Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 fe33eb39
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Showing with 199 addition and 100 deletion
net/wireless/reg.c
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...@@ -54,14 +54,18 @@ static u32 supported_bandwidths[] = { ...@@ -54,14 +54,18 @@ static u32 supported_bandwidths[] = {
MHZ_TO_KHZ(20), MHZ_TO_KHZ(20),
}; };
/* Central wireless core regulatory domains, we only need two, /*
* Central wireless core regulatory domains, we only need two,
* the current one and a world regulatory domain in case we have no * the current one and a world regulatory domain in case we have no
* information to give us an alpha2 */ * information to give us an alpha2
*/
const struct ieee80211_regdomain *cfg80211_regdomain; const struct ieee80211_regdomain *cfg80211_regdomain;
/* We use this as a place for the rd structure built from the /*
* We use this as a place for the rd structure built from the
* last parsed country IE to rest until CRDA gets back to us with * last parsed country IE to rest until CRDA gets back to us with
* what it thinks should apply for the same country */ * what it thinks should apply for the same country
*/
static const struct ieee80211_regdomain *country_ie_regdomain; static const struct ieee80211_regdomain *country_ie_regdomain;
static LIST_HEAD(reg_requests_list); static LIST_HEAD(reg_requests_list);
...@@ -86,9 +90,11 @@ static char *ieee80211_regdom = "US"; ...@@ -86,9 +90,11 @@ static char *ieee80211_regdom = "US";
module_param(ieee80211_regdom, charp, 0444); module_param(ieee80211_regdom, charp, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
/* We assume 40 MHz bandwidth for the old regulatory work. /*
* We assume 40 MHz bandwidth for the old regulatory work.
* We make emphasis we are using the exact same frequencies * We make emphasis we are using the exact same frequencies
* as before */ * as before
*/
static const struct ieee80211_regdomain us_regdom = { static const struct ieee80211_regdomain us_regdom = {
.n_reg_rules = 6, .n_reg_rules = 6,
...@@ -127,8 +133,10 @@ static const struct ieee80211_regdomain jp_regdom = { ...@@ -127,8 +133,10 @@ static const struct ieee80211_regdomain jp_regdom = {
static const struct ieee80211_regdomain eu_regdom = { static const struct ieee80211_regdomain eu_regdom = {
.n_reg_rules = 6, .n_reg_rules = 6,
/* This alpha2 is bogus, we leave it here just for stupid /*
* backward compatibility */ * This alpha2 is bogus, we leave it here just for stupid
* backward compatibility
*/
.alpha2 = "EU", .alpha2 = "EU",
.reg_rules = { .reg_rules = {
/* IEEE 802.11b/g, channels 1..13 */ /* IEEE 802.11b/g, channels 1..13 */
...@@ -197,8 +205,10 @@ static void reset_regdomains(void) ...@@ -197,8 +205,10 @@ static void reset_regdomains(void)
cfg80211_regdomain = NULL; cfg80211_regdomain = NULL;
} }
/* Dynamic world regulatory domain requested by the wireless /*
* core upon initialization */ * Dynamic world regulatory domain requested by the wireless
* core upon initialization
*/
static void update_world_regdomain(const struct ieee80211_regdomain *rd) static void update_world_regdomain(const struct ieee80211_regdomain *rd)
{ {
BUG_ON(!last_request); BUG_ON(!last_request);
...@@ -239,8 +249,10 @@ static bool is_unknown_alpha2(const char *alpha2) ...@@ -239,8 +249,10 @@ static bool is_unknown_alpha2(const char *alpha2)
{ {
if (!alpha2) if (!alpha2)
return false; return false;
/* Special case where regulatory domain was built by driver /*
* but a specific alpha2 cannot be determined */ * Special case where regulatory domain was built by driver
* but a specific alpha2 cannot be determined
*/
if (alpha2[0] == '9' && alpha2[1] == '9') if (alpha2[0] == '9' && alpha2[1] == '9')
return true; return true;
return false; return false;
...@@ -250,9 +262,11 @@ static bool is_intersected_alpha2(const char *alpha2) ...@@ -250,9 +262,11 @@ static bool is_intersected_alpha2(const char *alpha2)
{ {
if (!alpha2) if (!alpha2)
return false; return false;
/* Special case where regulatory domain is the /*
* Special case where regulatory domain is the
* result of an intersection between two regulatory domain * result of an intersection between two regulatory domain
* structures */ * structures
*/
if (alpha2[0] == '9' && alpha2[1] == '8') if (alpha2[0] == '9' && alpha2[1] == '8')
return true; return true;
return false; return false;
...@@ -307,8 +321,10 @@ static bool country_ie_integrity_changes(u32 checksum) ...@@ -307,8 +321,10 @@ static bool country_ie_integrity_changes(u32 checksum)
return false; return false;
} }
/* This lets us keep regulatory code which is updated on a regulatory /*
* basis in userspace. */ * This lets us keep regulatory code which is updated on a regulatory
* basis in userspace.
*/
static int call_crda(const char *alpha2) static int call_crda(const char *alpha2)
{ {
char country_env[9 + 2] = "COUNTRY="; char country_env[9 + 2] = "COUNTRY=";
...@@ -419,10 +435,12 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, ...@@ -419,10 +435,12 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
#undef ONE_GHZ_IN_KHZ #undef ONE_GHZ_IN_KHZ
} }
/* Converts a country IE to a regulatory domain. A regulatory domain /*
* Converts a country IE to a regulatory domain. A regulatory domain
* structure has a lot of information which the IE doesn't yet have, * structure has a lot of information which the IE doesn't yet have,
* so for the other values we use upper max values as we will intersect * so for the other values we use upper max values as we will intersect
* with our userspace regulatory agent to get lower bounds. */ * with our userspace regulatory agent to get lower bounds.
*/
static struct ieee80211_regdomain *country_ie_2_rd( static struct ieee80211_regdomain *country_ie_2_rd(
u8 *country_ie, u8 *country_ie,
u8 country_ie_len, u8 country_ie_len,
...@@ -467,9 +485,11 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -467,9 +485,11 @@ static struct ieee80211_regdomain *country_ie_2_rd(
*checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8);
/* We need to build a reg rule for each triplet, but first we must /*
* We need to build a reg rule for each triplet, but first we must
* calculate the number of reg rules we will need. We will need one * calculate the number of reg rules we will need. We will need one
* for each channel subband */ * for each channel subband
*/
while (country_ie_len >= 3) { while (country_ie_len >= 3) {
int end_channel = 0; int end_channel = 0;
struct ieee80211_country_ie_triplet *triplet = struct ieee80211_country_ie_triplet *triplet =
...@@ -507,9 +527,11 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -507,9 +527,11 @@ static struct ieee80211_regdomain *country_ie_2_rd(
if (cur_sub_max_channel < cur_channel) if (cur_sub_max_channel < cur_channel)
return NULL; return NULL;
/* Do not allow overlapping channels. Also channels /*
* Do not allow overlapping channels. Also channels
* passed in each subband must be monotonically * passed in each subband must be monotonically
* increasing */ * increasing
*/
if (last_sub_max_channel) { if (last_sub_max_channel) {
if (cur_channel <= last_sub_max_channel) if (cur_channel <= last_sub_max_channel)
return NULL; return NULL;
...@@ -517,10 +539,12 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -517,10 +539,12 @@ static struct ieee80211_regdomain *country_ie_2_rd(
return NULL; return NULL;
} }
/* When dot11RegulatoryClassesRequired is supported /*
* When dot11RegulatoryClassesRequired is supported
* we can throw ext triplets as part of this soup, * we can throw ext triplets as part of this soup,
* for now we don't care when those change as we * for now we don't care when those change as we
* don't support them */ * don't support them
*/
*checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) |
((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) |
((triplet->chans.max_power ^ cur_sub_max_channel) << 24); ((triplet->chans.max_power ^ cur_sub_max_channel) << 24);
...@@ -531,8 +555,10 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -531,8 +555,10 @@ static struct ieee80211_regdomain *country_ie_2_rd(
country_ie_len -= 3; country_ie_len -= 3;
num_rules++; num_rules++;
/* Note: this is not a IEEE requirement but /*
* simply a memory requirement */ * Note: this is not a IEEE requirement but
* simply a memory requirement
*/
if (num_rules > NL80211_MAX_SUPP_REG_RULES) if (num_rules > NL80211_MAX_SUPP_REG_RULES)
return NULL; return NULL;
} }
...@@ -560,8 +586,10 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -560,8 +586,10 @@ static struct ieee80211_regdomain *country_ie_2_rd(
struct ieee80211_freq_range *freq_range = NULL; struct ieee80211_freq_range *freq_range = NULL;
struct ieee80211_power_rule *power_rule = NULL; struct ieee80211_power_rule *power_rule = NULL;
/* Must parse if dot11RegulatoryClassesRequired is true, /*
* we don't support this yet */ * Must parse if dot11RegulatoryClassesRequired is true,
* we don't support this yet
*/
if (triplet->ext.reg_extension_id >= if (triplet->ext.reg_extension_id >=
IEEE80211_COUNTRY_EXTENSION_ID) { IEEE80211_COUNTRY_EXTENSION_ID) {
country_ie += 3; country_ie += 3;
...@@ -583,10 +611,12 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -583,10 +611,12 @@ static struct ieee80211_regdomain *country_ie_2_rd(
end_channel = triplet->chans.first_channel + end_channel = triplet->chans.first_channel +
(4 * (triplet->chans.num_channels - 1)); (4 * (triplet->chans.num_channels - 1));
/* The +10 is since the regulatory domain expects /*
* The +10 is since the regulatory domain expects
* the actual band edge, not the center of freq for * the actual band edge, not the center of freq for
* its start and end freqs, assuming 20 MHz bandwidth on * its start and end freqs, assuming 20 MHz bandwidth on
* the channels passed */ * the channels passed
*/
freq_range->start_freq_khz = freq_range->start_freq_khz =
MHZ_TO_KHZ(ieee80211_channel_to_frequency( MHZ_TO_KHZ(ieee80211_channel_to_frequency(
triplet->chans.first_channel) - 10); triplet->chans.first_channel) - 10);
...@@ -594,9 +624,11 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -594,9 +624,11 @@ static struct ieee80211_regdomain *country_ie_2_rd(
MHZ_TO_KHZ(ieee80211_channel_to_frequency( MHZ_TO_KHZ(ieee80211_channel_to_frequency(
end_channel) + 10); end_channel) + 10);
/* Large arbitrary values, we intersect later */ /*
/* Increment this if we ever support >= 40 MHz channels * These are large arbitrary values we use to intersect later.
* in IEEE 802.11 */ * Increment this if we ever support >= 40 MHz channels
* in IEEE 802.11
*/
freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40);
power_rule->max_antenna_gain = DBI_TO_MBI(100); power_rule->max_antenna_gain = DBI_TO_MBI(100);
power_rule->max_eirp = DBM_TO_MBM(100); power_rule->max_eirp = DBM_TO_MBM(100);
...@@ -612,8 +644,10 @@ static struct ieee80211_regdomain *country_ie_2_rd( ...@@ -612,8 +644,10 @@ static struct ieee80211_regdomain *country_ie_2_rd(
} }
/* Helper for regdom_intersect(), this does the real /*
* mathematical intersection fun */ * Helper for regdom_intersect(), this does the real
* mathematical intersection fun
*/
static int reg_rules_intersect( static int reg_rules_intersect(
const struct ieee80211_reg_rule *rule1, const struct ieee80211_reg_rule *rule1,
const struct ieee80211_reg_rule *rule2, const struct ieee80211_reg_rule *rule2,
...@@ -691,11 +725,13 @@ static struct ieee80211_regdomain *regdom_intersect( ...@@ -691,11 +725,13 @@ static struct ieee80211_regdomain *regdom_intersect(
if (!rd1 || !rd2) if (!rd1 || !rd2)
return NULL; return NULL;
/* First we get a count of the rules we'll need, then we actually /*
* First we get a count of the rules we'll need, then we actually
* build them. This is to so we can malloc() and free() a * build them. This is to so we can malloc() and free() a
* regdomain once. The reason we use reg_rules_intersect() here * regdomain once. The reason we use reg_rules_intersect() here
* is it will return -EINVAL if the rule computed makes no sense. * is it will return -EINVAL if the rule computed makes no sense.
* All rules that do check out OK are valid. */ * All rules that do check out OK are valid.
*/
for (x = 0; x < rd1->n_reg_rules; x++) { for (x = 0; x < rd1->n_reg_rules; x++) {
rule1 = &rd1->reg_rules[x]; rule1 = &rd1->reg_rules[x];
...@@ -723,14 +759,18 @@ static struct ieee80211_regdomain *regdom_intersect( ...@@ -723,14 +759,18 @@ static struct ieee80211_regdomain *regdom_intersect(
rule1 = &rd1->reg_rules[x]; rule1 = &rd1->reg_rules[x];
for (y = 0; y < rd2->n_reg_rules; y++) { for (y = 0; y < rd2->n_reg_rules; y++) {
rule2 = &rd2->reg_rules[y]; rule2 = &rd2->reg_rules[y];
/* This time around instead of using the stack lets /*
* This time around instead of using the stack lets
* write to the target rule directly saving ourselves * write to the target rule directly saving ourselves
* a memcpy() */ * a memcpy()
*/
intersected_rule = &rd->reg_rules[rule_idx]; intersected_rule = &rd->reg_rules[rule_idx];
r = reg_rules_intersect(rule1, rule2, r = reg_rules_intersect(rule1, rule2,
intersected_rule); intersected_rule);
/* No need to memset here the intersected rule here as /*
* we're not using the stack anymore */ * No need to memset here the intersected rule here as
* we're not using the stack anymore
*/
if (r) if (r)
continue; continue;
rule_idx++; rule_idx++;
...@@ -749,8 +789,10 @@ static struct ieee80211_regdomain *regdom_intersect( ...@@ -749,8 +789,10 @@ static struct ieee80211_regdomain *regdom_intersect(
return rd; return rd;
} }
/* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may /*
* want to just have the channel structure use these */ * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
* want to just have the channel structure use these
*/
static u32 map_regdom_flags(u32 rd_flags) static u32 map_regdom_flags(u32 rd_flags)
{ {
u32 channel_flags = 0; u32 channel_flags = 0;
...@@ -776,8 +818,10 @@ static int freq_reg_info_regd(struct wiphy *wiphy, ...@@ -776,8 +818,10 @@ static int freq_reg_info_regd(struct wiphy *wiphy,
regd = custom_regd ? custom_regd : cfg80211_regdomain; regd = custom_regd ? custom_regd : cfg80211_regdomain;
/* Follow the driver's regulatory domain, if present, unless a country /*
* IE has been processed or a user wants to help complaince further */ * Follow the driver's regulatory domain, if present, unless a country
* IE has been processed or a user wants to help complaince further
*/
if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE &&
last_request->initiator != REGDOM_SET_BY_USER && last_request->initiator != REGDOM_SET_BY_USER &&
wiphy->regd) wiphy->regd)
...@@ -795,9 +839,11 @@ static int freq_reg_info_regd(struct wiphy *wiphy, ...@@ -795,9 +839,11 @@ static int freq_reg_info_regd(struct wiphy *wiphy,
fr = &rr->freq_range; fr = &rr->freq_range;
pr = &rr->power_rule; pr = &rr->power_rule;
/* We only need to know if one frequency rule was /*
* We only need to know if one frequency rule was
* was in center_freq's band, that's enough, so lets * was in center_freq's band, that's enough, so lets
* not overwrite it once found */ * not overwrite it once found
*/
if (!band_rule_found) if (!band_rule_found)
band_rule_found = freq_in_rule_band(fr, center_freq); band_rule_found = freq_in_rule_band(fr, center_freq);
...@@ -850,7 +896,8 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, ...@@ -850,7 +896,8 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
&max_bandwidth, &reg_rule); &max_bandwidth, &reg_rule);
if (r) { if (r) {
/* This means no regulatory rule was found in the country IE /*
* This means no regulatory rule was found in the country IE
* with a frequency range on the center_freq's band, since * with a frequency range on the center_freq's band, since
* IEEE-802.11 allows for a country IE to have a subset of the * IEEE-802.11 allows for a country IE to have a subset of the
* regulatory information provided in a country we ignore * regulatory information provided in a country we ignore
...@@ -869,8 +916,10 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, ...@@ -869,8 +916,10 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
chan->center_freq, wiphy_name(wiphy)); chan->center_freq, wiphy_name(wiphy));
#endif #endif
} else { } else {
/* In this case we know the country IE has at least one reg rule /*
* for the band so we respect its band definitions */ * In this case we know the country IE has at least one reg rule
* for the band so we respect its band definitions
*/
#ifdef CONFIG_CFG80211_REG_DEBUG #ifdef CONFIG_CFG80211_REG_DEBUG
if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
printk(KERN_DEBUG "cfg80211: Disabling " printk(KERN_DEBUG "cfg80211: Disabling "
...@@ -889,9 +938,11 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, ...@@ -889,9 +938,11 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
if (last_request->initiator == REGDOM_SET_BY_DRIVER && if (last_request->initiator == REGDOM_SET_BY_DRIVER &&
request_wiphy && request_wiphy == wiphy && request_wiphy && request_wiphy == wiphy &&
request_wiphy->strict_regulatory) { request_wiphy->strict_regulatory) {
/* This gaurantees the driver's requested regulatory domain /*
* This gaurantees the driver's requested regulatory domain
* will always be used as a base for further regulatory * will always be used as a base for further regulatory
* settings */ * settings
*/
chan->flags = chan->orig_flags = chan->flags = chan->orig_flags =
map_regdom_flags(reg_rule->flags); map_regdom_flags(reg_rule->flags);
chan->max_antenna_gain = chan->orig_mag = chan->max_antenna_gain = chan->orig_mag =
...@@ -932,8 +983,10 @@ static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) ...@@ -932,8 +983,10 @@ static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby)
if (setby == REGDOM_SET_BY_CORE && if (setby == REGDOM_SET_BY_CORE &&
wiphy->custom_regulatory) wiphy->custom_regulatory)
return true; return true;
/* wiphy->regd will be set once the device has its own /*
* desired regulatory domain set */ * wiphy->regd will be set once the device has its own
* desired regulatory domain set
*/
if (wiphy->strict_regulatory && !wiphy->regd && if (wiphy->strict_regulatory && !wiphy->regd &&
!is_world_regdom(last_request->alpha2)) !is_world_regdom(last_request->alpha2))
return true; return true;
...@@ -1043,8 +1096,10 @@ static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, ...@@ -1043,8 +1096,10 @@ static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
return 0; return 0;
} }
/* Return value which can be used by ignore_request() to indicate /*
* it has been determined we should intersect two regulatory domains */ * Return value which can be used by ignore_request() to indicate
* it has been determined we should intersect two regulatory domains
*/
#define REG_INTERSECT 1 #define REG_INTERSECT 1
/* This has the logic which determines when a new request /* 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, ...@@ -1084,8 +1139,10 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
return -EOPNOTSUPP; return -EOPNOTSUPP;
return -EALREADY; return -EALREADY;
} }
/* Two consecutive Country IE hints on the same wiphy. /*
* This should be picked up early by the driver/stack */ * Two consecutive Country IE hints on the same wiphy.
* This should be picked up early by the driver/stack
*/
if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2, if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2,
alpha2))) alpha2)))
return 0; return 0;
...@@ -1104,13 +1161,17 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, ...@@ -1104,13 +1161,17 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
case REGDOM_SET_BY_USER: case REGDOM_SET_BY_USER:
if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
return REG_INTERSECT; return REG_INTERSECT;
/* If the user knows better the user should set the regdom /*
* to their country before the IE is picked up */ * If the user knows better the user should set the regdom
* to their country before the IE is picked up
*/
if (last_request->initiator == REGDOM_SET_BY_USER && if (last_request->initiator == REGDOM_SET_BY_USER &&
last_request->intersect) last_request->intersect)
return -EOPNOTSUPP; return -EOPNOTSUPP;
/* Process user requests only after previous user/driver/core /*
* requests have been processed */ * Process user requests only after previous user/driver/core
* requests have been processed
*/
if (last_request->initiator == REGDOM_SET_BY_CORE || if (last_request->initiator == REGDOM_SET_BY_CORE ||
last_request->initiator == REGDOM_SET_BY_DRIVER || last_request->initiator == REGDOM_SET_BY_DRIVER ||
last_request->initiator == REGDOM_SET_BY_USER) { last_request->initiator == REGDOM_SET_BY_USER) {
...@@ -1151,9 +1212,11 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, ...@@ -1151,9 +1212,11 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
} }
intersect = true; intersect = true;
} else if (r) { } else if (r) {
/* If the regulatory domain being requested by the /*
* If the regulatory domain being requested by the
* driver has already been set just copy it to the * driver has already been set just copy it to the
* wiphy */ * wiphy
*/
if (r == -EALREADY && set_by == REGDOM_SET_BY_DRIVER) { if (r == -EALREADY && set_by == REGDOM_SET_BY_DRIVER) {
r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
if (r) if (r)
...@@ -1363,9 +1426,11 @@ static bool reg_same_country_ie_hint(struct wiphy *wiphy, ...@@ -1363,9 +1426,11 @@ static bool reg_same_country_ie_hint(struct wiphy *wiphy,
if (likely(request_wiphy != wiphy)) if (likely(request_wiphy != wiphy))
return !country_ie_integrity_changes(country_ie_checksum); return !country_ie_integrity_changes(country_ie_checksum);
/* We should not have let these through at this point, they /*
* We should not have let these through at this point, they
* should have been picked up earlier by the first alpha2 check * should have been picked up earlier by the first alpha2 check
* on the device */ * on the device
*/
if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum)))
return true; return true;
return false; return false;
...@@ -1395,9 +1460,11 @@ void regulatory_hint_11d(struct wiphy *wiphy, ...@@ -1395,9 +1460,11 @@ void regulatory_hint_11d(struct wiphy *wiphy,
if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
goto out; goto out;
/* Pending country IE processing, this can happen after we /*
* Pending country IE processing, this can happen after we
* call CRDA and wait for a response if a beacon was received before * call CRDA and wait for a response if a beacon was received before
* we were able to process the last regulatory_hint_11d() call */ * we were able to process the last regulatory_hint_11d() call
*/
if (country_ie_regdomain) if (country_ie_regdomain)
goto out; goto out;
...@@ -1409,34 +1476,44 @@ void regulatory_hint_11d(struct wiphy *wiphy, ...@@ -1409,34 +1476,44 @@ void regulatory_hint_11d(struct wiphy *wiphy,
else if (country_ie[2] == 'O') else if (country_ie[2] == 'O')
env = ENVIRON_OUTDOOR; env = ENVIRON_OUTDOOR;
/* We will run this for *every* beacon processed for the BSSID, so /*
* We will run this for *every* beacon processed for the BSSID, so
* we optimize an early check to exit out early if we don't have to * we optimize an early check to exit out early if we don't have to
* do anything */ * do anything
*/
if (likely(wiphy_idx_valid(last_request->wiphy_idx))) { if (likely(wiphy_idx_valid(last_request->wiphy_idx))) {
struct cfg80211_registered_device *drv_last_ie; struct cfg80211_registered_device *drv_last_ie;
drv_last_ie = drv_last_ie =
cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx);
/* Lets keep this simple -- we trust the first AP /*
* after we intersect with CRDA */ * Lets keep this simple -- we trust the first AP
* after we intersect with CRDA
*/
if (likely(&drv_last_ie->wiphy == wiphy)) { if (likely(&drv_last_ie->wiphy == wiphy)) {
/* Ignore IEs coming in on this wiphy with /*
* the same alpha2 and environment cap */ * Ignore IEs coming in on this wiphy with
* the same alpha2 and environment cap
*/
if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
alpha2) && alpha2) &&
env == drv_last_ie->env)) { env == drv_last_ie->env)) {
goto out; goto out;
} }
/* the wiphy moved on to another BSSID or the AP /*
* the wiphy moved on to another BSSID or the AP
* was reconfigured. XXX: We need to deal with the * was reconfigured. XXX: We need to deal with the
* case where the user suspends and goes to goes * case where the user suspends and goes to goes
* to another country, and then gets IEs from an * to another country, and then gets IEs from an
* AP with different settings */ * AP with different settings
*/
goto out; goto out;
} else { } else {
/* Ignore IEs coming in on two separate wiphys with /*
* the same alpha2 and environment cap */ * Ignore IEs coming in on two separate wiphys with
* the same alpha2 and environment cap
*/
if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
alpha2) && alpha2) &&
env == drv_last_ie->env)) { env == drv_last_ie->env)) {
...@@ -1467,8 +1544,10 @@ void regulatory_hint_11d(struct wiphy *wiphy, ...@@ -1467,8 +1544,10 @@ void regulatory_hint_11d(struct wiphy *wiphy,
if (!request) if (!request)
goto free_rd_out; goto free_rd_out;
/* We keep this around for when CRDA comes back with a response so /*
* we can intersect with that */ * We keep this around for when CRDA comes back with a response so
* we can intersect with that
*/
country_ie_regdomain = rd; country_ie_regdomain = rd;
request->wiphy_idx = get_wiphy_idx(wiphy); request->wiphy_idx = get_wiphy_idx(wiphy);
...@@ -1506,8 +1585,10 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd) ...@@ -1506,8 +1585,10 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd)
freq_range = &reg_rule->freq_range; freq_range = &reg_rule->freq_range;
power_rule = &reg_rule->power_rule; power_rule = &reg_rule->power_rule;
/* There may not be documentation for max antenna gain /*
* in certain regions */ * There may not be documentation for max antenna gain
* in certain regions
*/
if (power_rule->max_antenna_gain) if (power_rule->max_antenna_gain)
printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
"(%d mBi, %d mBm)\n", "(%d mBi, %d mBm)\n",
...@@ -1618,21 +1699,27 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) ...@@ -1618,21 +1699,27 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
if (!last_request) if (!last_request)
return -EINVAL; return -EINVAL;
/* Lets only bother proceeding on the same alpha2 if the current /*
* Lets only bother proceeding on the same alpha2 if the current
* rd is non static (it means CRDA was present and was used last) * rd is non static (it means CRDA was present and was used last)
* and the pending request came in from a country IE */ * and the pending request came in from a country IE
*/
if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
/* If someone else asked us to change the rd lets only bother /*
* checking if the alpha2 changes if CRDA was already called */ * If someone else asked us to change the rd lets only bother
* checking if the alpha2 changes if CRDA was already called
*/
if (!is_old_static_regdom(cfg80211_regdomain) && if (!is_old_static_regdom(cfg80211_regdomain) &&
!regdom_changed(rd->alpha2)) !regdom_changed(rd->alpha2))
return -EINVAL; return -EINVAL;
} }
/* Now lets set the regulatory domain, update all driver channels /*
* Now lets set the regulatory domain, update all driver channels
* and finally inform them of what we have done, in case they want * and finally inform them of what we have done, in case they want
* to review or adjust their own settings based on their own * to review or adjust their own settings based on their own
* internal EEPROM data */ * internal EEPROM data
*/
if (WARN_ON(!reg_is_valid_request(rd->alpha2))) if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
return -EINVAL; return -EINVAL;
...@@ -1655,8 +1742,10 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) ...@@ -1655,8 +1742,10 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
return 0; return 0;
} }
/* For a driver hint, lets copy the regulatory domain the /*
* driver wanted to the wiphy to deal with conflicts */ * For a driver hint, lets copy the regulatory domain the
* driver wanted to the wiphy to deal with conflicts
*/
BUG_ON(request_wiphy->regd); BUG_ON(request_wiphy->regd);
...@@ -1677,9 +1766,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) ...@@ -1677,9 +1766,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
if (!intersected_rd) if (!intersected_rd)
return -EINVAL; return -EINVAL;
/* We can trash what CRDA provided now. /*
* We can trash what CRDA provided now.
* However if a driver requested this specific regulatory * However if a driver requested this specific regulatory
* domain we keep it for its private use */ * domain we keep it for its private use
*/
if (last_request->initiator == REGDOM_SET_BY_DRIVER) if (last_request->initiator == REGDOM_SET_BY_DRIVER)
request_wiphy->regd = rd; request_wiphy->regd = rd;
else else
...@@ -1701,8 +1792,10 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) ...@@ -1701,8 +1792,10 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
BUG_ON(!country_ie_regdomain); BUG_ON(!country_ie_regdomain);
if (rd != country_ie_regdomain) { if (rd != country_ie_regdomain) {
/* Intersect what CRDA returned and our what we /*
* had built from the Country IE received */ * Intersect what CRDA returned and our what we
* had built from the Country IE received
*/
intersected_rd = regdom_intersect(rd, country_ie_regdomain); intersected_rd = regdom_intersect(rd, country_ie_regdomain);
...@@ -1712,9 +1805,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) ...@@ -1712,9 +1805,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
kfree(country_ie_regdomain); kfree(country_ie_regdomain);
country_ie_regdomain = NULL; country_ie_regdomain = NULL;
} else { } else {
/* This would happen when CRDA was not present and /*
* This would happen when CRDA was not present and
* OLD_REGULATORY was enabled. We intersect our Country * OLD_REGULATORY was enabled. We intersect our Country
* IE rd and what was set on cfg80211 originally */ * IE rd and what was set on cfg80211 originally
*/
intersected_rd = regdom_intersect(rd, cfg80211_regdomain); intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
} }
...@@ -1739,9 +1834,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) ...@@ -1739,9 +1834,11 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
} }
/* Use this call to set the current regulatory domain. Conflicts with /*
* Use this call to set the current regulatory domain. Conflicts with
* multiple drivers can be ironed out later. Caller must've already * multiple drivers can be ironed out later. Caller must've already
* kmalloc'd the rd structure. Caller must hold cfg80211_mutex */ * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
*/
int set_regdom(const struct ieee80211_regdomain *rd) int set_regdom(const struct ieee80211_regdomain *rd)
{ {
int r; int r;
...@@ -1800,10 +1897,12 @@ int regulatory_init(void) ...@@ -1800,10 +1897,12 @@ int regulatory_init(void)
printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
print_regdomain_info(cfg80211_regdomain); print_regdomain_info(cfg80211_regdomain);
/* The old code still requests for a new regdomain and if /*
* The old code still requests for a new regdomain and if
* you have CRDA you get it updated, otherwise you get * you have CRDA you get it updated, otherwise you get
* stuck with the static values. We ignore "EU" code as * stuck with the static values. We ignore "EU" code as
* that is not a valid ISO / IEC 3166 alpha2 */ * that is not a valid ISO / IEC 3166 alpha2
*/
if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
err = regulatory_hint_core(ieee80211_regdom); err = regulatory_hint_core(ieee80211_regdom);
#else #else
......
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