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-rwxr-xr-xnet/wireless_ath/reg.c2307
1 files changed, 0 insertions, 2307 deletions
diff --git a/net/wireless_ath/reg.c b/net/wireless_ath/reg.c
deleted file mode 100755
index a797919..0000000
--- a/net/wireless_ath/reg.c
+++ /dev/null
@@ -1,2307 +0,0 @@
-/*
- * Copyright 2002-2005, Instant802 Networks, Inc.
- * Copyright 2005-2006, Devicescape Software, Inc.
- * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/**
- * DOC: Wireless regulatory infrastructure
- *
- * The usual implementation is for a driver to read a device EEPROM to
- * determine which regulatory domain it should be operating under, then
- * looking up the allowable channels in a driver-local table and finally
- * registering those channels in the wiphy structure.
- *
- * Another set of compliance enforcement is for drivers to use their
- * own compliance limits which can be stored on the EEPROM. The host
- * driver or firmware may ensure these are used.
- *
- * In addition to all this we provide an extra layer of regulatory
- * conformance. For drivers which do not have any regulatory
- * information CRDA provides the complete regulatory solution.
- * For others it provides a community effort on further restrictions
- * to enhance compliance.
- *
- * Note: When number of rules --> infinity we will not be able to
- * index on alpha2 any more, instead we'll probably have to
- * rely on some SHA1 checksum of the regdomain for example.
- *
- */
-
-//#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/random.h>
-#include <linux/ctype.h>
-#include <linux/nl80211.h>
-#include <linux/platform_device.h>
-#include <linux/moduleparam.h>
-#include <net/cfg80211.h>
-#include "core.h"
-#include "reg.h"
-#include "regdb.h"
-#include "nl80211.h"
-
-#ifdef CONFIG_CFG80211_REG_DEBUG
-#define REG_DBG_PRINT(format, args...) \
- printk(KERN_DEBUG pr_fmt(format), ##args)
-#else
-#define REG_DBG_PRINT(args...)
-#endif
-
-/* Receipt of information from last regulatory request */
-static struct regulatory_request *last_request;
-
-/* To trigger userspace events */
-static struct platform_device *reg_pdev;
-
-static struct device_type reg_device_type = {
- .uevent = reg_device_uevent,
-};
-
-/*
- * Central wireless core regulatory domains, we only need two,
- * the current one and a world regulatory domain in case we have no
- * information to give us an alpha2
- */
-const struct ieee80211_regdomain *cfg80211_regdomain;
-
-/*
- * Protects static reg.c components:
- * - cfg80211_world_regdom
- * - cfg80211_regdom
- * - last_request
- */
-static DEFINE_MUTEX(reg_mutex);
-
-static inline void assert_reg_lock(void)
-{
- lockdep_assert_held(&reg_mutex);
-}
-
-/* Used to queue up regulatory hints */
-static LIST_HEAD(reg_requests_list);
-static spinlock_t reg_requests_lock;
-
-/* Used to queue up beacon hints for review */
-static LIST_HEAD(reg_pending_beacons);
-static spinlock_t reg_pending_beacons_lock;
-
-/* Used to keep track of processed beacon hints */
-static LIST_HEAD(reg_beacon_list);
-
-struct reg_beacon {
- struct list_head list;
- struct ieee80211_channel chan;
-};
-
-static void reg_todo(struct work_struct *work);
-static DECLARE_WORK(reg_work, reg_todo);
-
-static void reg_timeout_work(struct work_struct *work);
-static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
-
-/* We keep a static world regulatory domain in case of the absence of CRDA */
-static const struct ieee80211_regdomain world_regdom = {
- .n_reg_rules = 5,
- .alpha2 = "00",
- .reg_rules = {
- /* IEEE 802.11b/g, channels 1..11 */
- REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
- /* IEEE 802.11b/g, channels 12..13. No HT40
- * channel fits here. */
- REG_RULE(2467-10, 2472+10, 20, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS),
- /* IEEE 802.11 channel 14 - Only JP enables
- * this and for 802.11b only */
- REG_RULE(2484-10, 2484+10, 20, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS |
- NL80211_RRF_NO_OFDM),
- /* IEEE 802.11a, channel 36..48 */
- REG_RULE(5180-10, 5240+10, 40, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS),
-
- /* NB: 5260 MHz - 5700 MHz requies DFS */
-
- /* IEEE 802.11a, channel 149..165 */
- REG_RULE(5745-10, 5825+10, 40, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS),
- }
-};
-
-static const struct ieee80211_regdomain *cfg80211_world_regdom =
- &world_regdom;
-
-static char *ieee80211_regdom = "00";
-static char user_alpha2[2];
-
-module_param(ieee80211_regdom, charp, 0444);
-MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
-
-static void reset_regdomains(void)
-{
- /* avoid freeing static information or freeing something twice */
- if (cfg80211_regdomain == cfg80211_world_regdom)
- cfg80211_regdomain = NULL;
- if (cfg80211_world_regdom == &world_regdom)
- cfg80211_world_regdom = NULL;
- if (cfg80211_regdomain == &world_regdom)
- cfg80211_regdomain = NULL;
-
- kfree(cfg80211_regdomain);
- kfree(cfg80211_world_regdom);
-
- cfg80211_world_regdom = &world_regdom;
- cfg80211_regdomain = NULL;
-}
-
-/*
- * Dynamic world regulatory domain requested by the wireless
- * core upon initialization
- */
-static void update_world_regdomain(const struct ieee80211_regdomain *rd)
-{
- BUG_ON(!last_request);
-
- reset_regdomains();
-
- cfg80211_world_regdom = rd;
- cfg80211_regdomain = rd;
-}
-
-bool is_world_regdom(const char *alpha2)
-{
- if (!alpha2)
- return false;
- if (alpha2[0] == '0' && alpha2[1] == '0')
- return true;
- return false;
-}
-
-static bool is_alpha2_set(const char *alpha2)
-{
- if (!alpha2)
- return false;
- if (alpha2[0] != 0 && alpha2[1] != 0)
- return true;
- return false;
-}
-
-static bool is_unknown_alpha2(const char *alpha2)
-{
- if (!alpha2)
- return false;
- /*
- * Special case where regulatory domain was built by driver
- * but a specific alpha2 cannot be determined
- */
- if (alpha2[0] == '9' && alpha2[1] == '9')
- return true;
- return false;
-}
-
-static bool is_intersected_alpha2(const char *alpha2)
-{
- if (!alpha2)
- return false;
- /*
- * Special case where regulatory domain is the
- * result of an intersection between two regulatory domain
- * structures
- */
- if (alpha2[0] == '9' && alpha2[1] == '8')
- return true;
- return false;
-}
-
-static bool is_an_alpha2(const char *alpha2)
-{
- if (!alpha2)
- return false;
- if (isalpha(alpha2[0]) && isalpha(alpha2[1]))
- return true;
- return false;
-}
-
-static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
-{
- if (!alpha2_x || !alpha2_y)
- return false;
- if (alpha2_x[0] == alpha2_y[0] &&
- alpha2_x[1] == alpha2_y[1])
- return true;
- return false;
-}
-
-static bool regdom_changes(const char *alpha2)
-{
- assert_cfg80211_lock();
-
- if (!cfg80211_regdomain)
- return true;
- if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
- return false;
- return true;
-}
-
-/*
- * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
- * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
- * has ever been issued.
- */
-static bool is_user_regdom_saved(void)
-{
- if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
- return false;
-
- /* This would indicate a mistake on the design */
- if (WARN((!is_world_regdom(user_alpha2) &&
- !is_an_alpha2(user_alpha2)),
- "Unexpected user alpha2: %c%c\n",
- user_alpha2[0],
- user_alpha2[1]))
- return false;
-
- return true;
-}
-
-static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
- const struct ieee80211_regdomain *src_regd)
-{
- struct ieee80211_regdomain *regd;
- int size_of_regd = 0;
- unsigned int i;
-
- size_of_regd = sizeof(struct ieee80211_regdomain) +
- ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
-
- regd = kzalloc(size_of_regd, GFP_KERNEL);
- if (!regd)
- return -ENOMEM;
-
- memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
-
- for (i = 0; i < src_regd->n_reg_rules; i++)
- memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
- sizeof(struct ieee80211_reg_rule));
-
- *dst_regd = regd;
- return 0;
-}
-
-#ifdef CONFIG_CFG80211_INTERNAL_REGDB
-struct reg_regdb_search_request {
- char alpha2[2];
- struct list_head list;
-};
-
-static LIST_HEAD(reg_regdb_search_list);
-static DEFINE_MUTEX(reg_regdb_search_mutex);
-
-static void reg_regdb_search(struct work_struct *work)
-{
- struct reg_regdb_search_request *request;
- const struct ieee80211_regdomain *curdom, *regdom;
- int i, r;
-
- mutex_lock(&reg_regdb_search_mutex);
- while (!list_empty(&reg_regdb_search_list)) {
- request = list_first_entry(&reg_regdb_search_list,
- struct reg_regdb_search_request,
- list);
- list_del(&request->list);
-
- for (i=0; i<reg_regdb_size; i++) {
- curdom = reg_regdb[i];
-
- if (!memcmp(request->alpha2, curdom->alpha2, 2)) {
- r = reg_copy_regd(&regdom, curdom);
- if (r)
- break;
- mutex_lock(&cfg80211_mutex);
- set_regdom(regdom);
- mutex_unlock(&cfg80211_mutex);
- break;
- }
- }
-
- kfree(request);
- }
- mutex_unlock(&reg_regdb_search_mutex);
-}
-
-static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
-
-static void reg_regdb_query(const char *alpha2)
-{
- struct reg_regdb_search_request *request;
-
- if (!alpha2)
- return;
-
- request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
- if (!request)
- return;
-
- memcpy(request->alpha2, alpha2, 2);
-
- mutex_lock(&reg_regdb_search_mutex);
- list_add_tail(&request->list, &reg_regdb_search_list);
- mutex_unlock(&reg_regdb_search_mutex);
-
- schedule_work(&reg_regdb_work);
-}
-#else
-static inline void reg_regdb_query(const char *alpha2) {}
-#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
-
-/*
- * This lets us keep regulatory code which is updated on a regulatory
- * basis in userspace. Country information is filled in by
- * reg_device_uevent
- */
-static int call_crda(const char *alpha2)
-{
- if (!is_world_regdom((char *) alpha2))
- pr_info("Calling CRDA for country: %c%c\n",
- alpha2[0], alpha2[1]);
- else
- pr_info("Calling CRDA to update world regulatory domain\n");
-
- /* query internal regulatory database (if it exists) */
- reg_regdb_query(alpha2);
-
- return kobject_uevent(&reg_pdev->dev.kobj, KOBJ_CHANGE);
-}
-
-/* Used by nl80211 before kmalloc'ing our regulatory domain */
-bool reg_is_valid_request(const char *alpha2)
-{
- assert_cfg80211_lock();
-
- if (!last_request)
- return false;
-
- return alpha2_equal(last_request->alpha2, alpha2);
-}
-
-/* Sanity check on a regulatory rule */
-static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
-{
- const struct ieee80211_freq_range *freq_range = &rule->freq_range;
- u32 freq_diff;
-
- if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
- return false;
-
- if (freq_range->start_freq_khz > freq_range->end_freq_khz)
- return false;
-
- freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
-
- if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
- freq_range->max_bandwidth_khz > freq_diff)
- return false;
-
- return true;
-}
-
-static bool is_valid_rd(const struct ieee80211_regdomain *rd)
-{
- const struct ieee80211_reg_rule *reg_rule = NULL;
- unsigned int i;
-
- if (!rd->n_reg_rules)
- return false;
-
- if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
- return false;
-
- for (i = 0; i < rd->n_reg_rules; i++) {
- reg_rule = &rd->reg_rules[i];
- if (!is_valid_reg_rule(reg_rule))
- return false;
- }
-
- return true;
-}
-
-static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
- u32 center_freq_khz,
- u32 bw_khz)
-{
- u32 start_freq_khz, end_freq_khz;
-
- start_freq_khz = center_freq_khz - (bw_khz/2);
- end_freq_khz = center_freq_khz + (bw_khz/2);
-
- if (start_freq_khz >= freq_range->start_freq_khz &&
- end_freq_khz <= freq_range->end_freq_khz)
- return true;
-
- return false;
-}
-
-/**
- * freq_in_rule_band - tells us if a frequency is in a frequency band
- * @freq_range: frequency rule we want to query
- * @freq_khz: frequency we are inquiring about
- *
- * This lets us know if a specific frequency rule is or is not relevant to
- * a specific frequency's band. Bands are device specific and artificial
- * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is
- * safe for now to assume that a frequency rule should not be part of a
- * frequency's band if the start freq or end freq are off by more than 2 GHz.
- * This resolution can be lowered and should be considered as we add
- * regulatory rule support for other "bands".
- **/
-static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
- u32 freq_khz)
-{
-#define ONE_GHZ_IN_KHZ 1000000
- if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
- return true;
- if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
- return true;
- return false;
-#undef ONE_GHZ_IN_KHZ
-}
-
-/*
- * Helper for regdom_intersect(), this does the real
- * mathematical intersection fun
- */
-static int reg_rules_intersect(
- const struct ieee80211_reg_rule *rule1,
- const struct ieee80211_reg_rule *rule2,
- struct ieee80211_reg_rule *intersected_rule)
-{
- const struct ieee80211_freq_range *freq_range1, *freq_range2;
- struct ieee80211_freq_range *freq_range;
- const struct ieee80211_power_rule *power_rule1, *power_rule2;
- struct ieee80211_power_rule *power_rule;
- u32 freq_diff;
-
- freq_range1 = &rule1->freq_range;
- freq_range2 = &rule2->freq_range;
- freq_range = &intersected_rule->freq_range;
-
- power_rule1 = &rule1->power_rule;
- power_rule2 = &rule2->power_rule;
- power_rule = &intersected_rule->power_rule;
-
- freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
- freq_range2->start_freq_khz);
- freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
- freq_range2->end_freq_khz);
- freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
- freq_range2->max_bandwidth_khz);
-
- freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
- if (freq_range->max_bandwidth_khz > freq_diff)
- freq_range->max_bandwidth_khz = freq_diff;
-
- power_rule->max_eirp = min(power_rule1->max_eirp,
- power_rule2->max_eirp);
- power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
- power_rule2->max_antenna_gain);
-
- intersected_rule->flags = (rule1->flags | rule2->flags);
-
- if (!is_valid_reg_rule(intersected_rule))
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * regdom_intersect - do the intersection between two regulatory domains
- * @rd1: first regulatory domain
- * @rd2: second regulatory domain
- *
- * Use this function to get the intersection between two regulatory domains.
- * Once completed we will mark the alpha2 for the rd as intersected, "98",
- * as no one single alpha2 can represent this regulatory domain.
- *
- * Returns a pointer to the regulatory domain structure which will hold the
- * resulting intersection of rules between rd1 and rd2. We will
- * kzalloc() this structure for you.
- */
-static struct ieee80211_regdomain *regdom_intersect(
- const struct ieee80211_regdomain *rd1,
- const struct ieee80211_regdomain *rd2)
-{
- int r, size_of_regd;
- unsigned int x, y;
- unsigned int num_rules = 0, rule_idx = 0;
- const struct ieee80211_reg_rule *rule1, *rule2;
- struct ieee80211_reg_rule *intersected_rule;
- struct ieee80211_regdomain *rd;
- /* This is just a dummy holder to help us count */
- struct ieee80211_reg_rule irule;
-
- /* Uses the stack temporarily for counter arithmetic */
- intersected_rule = &irule;
-
- memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
-
- if (!rd1 || !rd2)
- return NULL;
-
- /*
- * 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
- * regdomain once. The reason we use reg_rules_intersect() here
- * is it will return -EINVAL if the rule computed makes no sense.
- * All rules that do check out OK are valid.
- */
-
- for (x = 0; x < rd1->n_reg_rules; x++) {
- rule1 = &rd1->reg_rules[x];
- for (y = 0; y < rd2->n_reg_rules; y++) {
- rule2 = &rd2->reg_rules[y];
- if (!reg_rules_intersect(rule1, rule2,
- intersected_rule))
- num_rules++;
- memset(intersected_rule, 0,
- sizeof(struct ieee80211_reg_rule));
- }
- }
-
- if (!num_rules)
- return NULL;
-
- size_of_regd = sizeof(struct ieee80211_regdomain) +
- ((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
-
- rd = kzalloc(size_of_regd, GFP_KERNEL);
- if (!rd)
- return NULL;
-
- for (x = 0; x < rd1->n_reg_rules; x++) {
- rule1 = &rd1->reg_rules[x];
- for (y = 0; y < rd2->n_reg_rules; y++) {
- rule2 = &rd2->reg_rules[y];
- /*
- * This time around instead of using the stack lets
- * write to the target rule directly saving ourselves
- * a memcpy()
- */
- intersected_rule = &rd->reg_rules[rule_idx];
- r = reg_rules_intersect(rule1, rule2,
- intersected_rule);
- /*
- * No need to memset here the intersected rule here as
- * we're not using the stack anymore
- */
- if (r)
- continue;
- rule_idx++;
- }
- }
-
- if (rule_idx != num_rules) {
- kfree(rd);
- return NULL;
- }
-
- rd->n_reg_rules = num_rules;
- rd->alpha2[0] = '9';
- rd->alpha2[1] = '8';
-
- 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
- */
-static u32 map_regdom_flags(u32 rd_flags)
-{
- u32 channel_flags = 0;
- if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
- channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
- if (rd_flags & NL80211_RRF_NO_IBSS)
- channel_flags |= IEEE80211_CHAN_NO_IBSS;
- if (rd_flags & NL80211_RRF_DFS)
- channel_flags |= IEEE80211_CHAN_RADAR;
- return channel_flags;
-}
-
-static int freq_reg_info_regd(struct wiphy *wiphy,
- u32 center_freq,
- u32 desired_bw_khz,
- const struct ieee80211_reg_rule **reg_rule,
- const struct ieee80211_regdomain *custom_regd)
-{
- int i;
- bool band_rule_found = false;
- const struct ieee80211_regdomain *regd;
- bool bw_fits = false;
-
- if (!desired_bw_khz)
- desired_bw_khz = MHZ_TO_KHZ(20);
-
- 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
- */
- if (!custom_regd &&
- last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- last_request->initiator != NL80211_REGDOM_SET_BY_USER &&
- wiphy->regd)
- regd = wiphy->regd;
-
- if (!regd)
- return -EINVAL;
-
- for (i = 0; i < regd->n_reg_rules; i++) {
- const struct ieee80211_reg_rule *rr;
- const struct ieee80211_freq_range *fr = NULL;
-
- rr = &regd->reg_rules[i];
- fr = &rr->freq_range;
-
- /*
- * We only need to know if one frequency rule was
- * was in center_freq's band, that's enough, so lets
- * not overwrite it once found
- */
- if (!band_rule_found)
- band_rule_found = freq_in_rule_band(fr, center_freq);
-
- bw_fits = reg_does_bw_fit(fr,
- center_freq,
- desired_bw_khz);
-
- if (band_rule_found && bw_fits) {
- *reg_rule = rr;
- return 0;
- }
- }
-
- if (!band_rule_found)
- return -ERANGE;
-
- return -EINVAL;
-}
-
-int freq_reg_info(struct wiphy *wiphy,
- u32 center_freq,
- u32 desired_bw_khz,
- const struct ieee80211_reg_rule **reg_rule)
-{
- assert_cfg80211_lock();
- return freq_reg_info_regd(wiphy,
- center_freq,
- desired_bw_khz,
- reg_rule,
- NULL);
-}
-EXPORT_SYMBOL(freq_reg_info);
-
-#ifdef CONFIG_CFG80211_REG_DEBUG
-static const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
-{
- switch (initiator) {
- case NL80211_REGDOM_SET_BY_CORE:
- return "Set by core";
- case NL80211_REGDOM_SET_BY_USER:
- return "Set by user";
- case NL80211_REGDOM_SET_BY_DRIVER:
- return "Set by driver";
- case NL80211_REGDOM_SET_BY_COUNTRY_IE:
- return "Set by country IE";
- default:
- WARN_ON(1);
- return "Set by bug";
- }
-}
-
-static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
- u32 desired_bw_khz,
- const struct ieee80211_reg_rule *reg_rule)
-{
- const struct ieee80211_power_rule *power_rule;
- const struct ieee80211_freq_range *freq_range;
- char max_antenna_gain[32];
-
- power_rule = &reg_rule->power_rule;
- freq_range = &reg_rule->freq_range;
-
- if (!power_rule->max_antenna_gain)
- snprintf(max_antenna_gain, 32, "N/A");
- else
- snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain);
-
- REG_DBG_PRINT("Updating information on frequency %d MHz "
- "for a %d MHz width channel with regulatory rule:\n",
- chan->center_freq,
- KHZ_TO_MHZ(desired_bw_khz));
-
- REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- freq_range->max_bandwidth_khz,
- max_antenna_gain,
- power_rule->max_eirp);
-}
-#else
-static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
- u32 desired_bw_khz,
- const struct ieee80211_reg_rule *reg_rule)
-{
- return;
-}
-#endif
-
-/*
- * Note that right now we assume the desired channel bandwidth
- * is always 20 MHz for each individual channel (HT40 uses 20 MHz
- * per channel, the primary and the extension channel). To support
- * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
- * new ieee80211_channel.target_bw and re run the regulatory check
- * on the wiphy with the target_bw specified. Then we can simply use
- * that below for the desired_bw_khz below.
- */
-static void handle_channel(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator,
- enum ieee80211_band band,
- unsigned int chan_idx)
-{
- int r;
- u32 flags, bw_flags = 0;
- u32 desired_bw_khz = MHZ_TO_KHZ(20);
- const struct ieee80211_reg_rule *reg_rule = NULL;
- const struct ieee80211_power_rule *power_rule = NULL;
- const struct ieee80211_freq_range *freq_range = NULL;
- struct ieee80211_supported_band *sband;
- struct ieee80211_channel *chan;
- struct wiphy *request_wiphy = NULL;
-
- assert_cfg80211_lock();
-
- request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
-
- sband = wiphy->bands[band];
- BUG_ON(chan_idx >= sband->n_channels);
- chan = &sband->channels[chan_idx];
-
- flags = chan->orig_flags;
-
- r = freq_reg_info(wiphy,
- MHZ_TO_KHZ(chan->center_freq),
- desired_bw_khz,
- &reg_rule);
-
- if (r) {
- /*
- * We will disable all channels that do not match our
- * received regulatory rule unless the hint is coming
- * from a Country IE and the Country IE had no information
- * about a band. The IEEE 802.11 spec allows for an AP
- * to send only a subset of the regulatory rules allowed,
- * so an AP in the US that only supports 2.4 GHz may only send
- * a country IE with information for the 2.4 GHz band
- * while 5 GHz is still supported.
- */
- if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- r == -ERANGE)
- return;
-
- REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq);
- chan->flags = IEEE80211_CHAN_DISABLED;
- return;
- }
-
- chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
-
- power_rule = &reg_rule->power_rule;
- freq_range = &reg_rule->freq_range;
-
- if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
- bw_flags = IEEE80211_CHAN_NO_HT40;
-
- if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- request_wiphy && request_wiphy == wiphy &&
- request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
- /*
- * This guarantees the driver's requested regulatory domain
- * will always be used as a base for further regulatory
- * settings
- */
- chan->flags = chan->orig_flags =
- map_regdom_flags(reg_rule->flags) | bw_flags;
- chan->max_antenna_gain = chan->orig_mag =
- (int) MBI_TO_DBI(power_rule->max_antenna_gain);
- chan->max_power = chan->orig_mpwr =
- (int) MBM_TO_DBM(power_rule->max_eirp);
- return;
- }
-
- chan->beacon_found = false;
- chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
- chan->max_antenna_gain = min(chan->orig_mag,
- (int) MBI_TO_DBI(power_rule->max_antenna_gain));
- if (chan->orig_mpwr)
- chan->max_power = min(chan->orig_mpwr,
- (int) MBM_TO_DBM(power_rule->max_eirp));
- else
- chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
-}
-
-static void handle_band(struct wiphy *wiphy,
- enum ieee80211_band band,
- enum nl80211_reg_initiator initiator)
-{
- unsigned int i;
- struct ieee80211_supported_band *sband;
-
- BUG_ON(!wiphy->bands[band]);
- sband = wiphy->bands[band];
-
- for (i = 0; i < sband->n_channels; i++)
- handle_channel(wiphy, initiator, band, i);
-}
-
-static bool ignore_reg_update(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator)
-{
- if (!last_request) {
- REG_DBG_PRINT("Ignoring regulatory request %s since "
- "last_request is not set\n",
- reg_initiator_name(initiator));
- return true;
- }
-
- if (initiator == NL80211_REGDOM_SET_BY_CORE &&
- wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
- REG_DBG_PRINT("Ignoring regulatory request %s "
- "since the driver uses its own custom "
- "regulatory domain\n",
- reg_initiator_name(initiator));
- return true;
- }
-
- /*
- * wiphy->regd will be set once the device has its own
- * desired regulatory domain set
- */
- if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd &&
- initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- !is_world_regdom(last_request->alpha2)) {
- REG_DBG_PRINT("Ignoring regulatory request %s "
- "since the driver requires its own regulatory "
- "domain to be set first\n",
- reg_initiator_name(initiator));
- return true;
- }
-
- return false;
-}
-
-static void handle_reg_beacon(struct wiphy *wiphy,
- unsigned int chan_idx,
- struct reg_beacon *reg_beacon)
-{
- struct ieee80211_supported_band *sband;
- struct ieee80211_channel *chan;
- bool channel_changed = false;
- struct ieee80211_channel chan_before;
-
- assert_cfg80211_lock();
-
- sband = wiphy->bands[reg_beacon->chan.band];
- chan = &sband->channels[chan_idx];
-
- if (likely(chan->center_freq != reg_beacon->chan.center_freq))
- return;
-
- if (chan->beacon_found)
- return;
-
- chan->beacon_found = true;
-
- if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS)
- return;
-
- chan_before.center_freq = chan->center_freq;
- chan_before.flags = chan->flags;
-
- if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) {
- chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
- channel_changed = true;
- }
-
- if (chan->flags & IEEE80211_CHAN_NO_IBSS) {
- chan->flags &= ~IEEE80211_CHAN_NO_IBSS;
- channel_changed = true;
- }
-
- if (channel_changed)
- nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
-}
-
-/*
- * Called when a scan on a wiphy finds a beacon on
- * new channel
- */
-static void wiphy_update_new_beacon(struct wiphy *wiphy,
- struct reg_beacon *reg_beacon)
-{
- unsigned int i;
- struct ieee80211_supported_band *sband;
-
- assert_cfg80211_lock();
-
- if (!wiphy->bands[reg_beacon->chan.band])
- return;
-
- sband = wiphy->bands[reg_beacon->chan.band];
-
- for (i = 0; i < sband->n_channels; i++)
- handle_reg_beacon(wiphy, i, reg_beacon);
-}
-
-/*
- * Called upon reg changes or a new wiphy is added
- */
-static void wiphy_update_beacon_reg(struct wiphy *wiphy)
-{
- unsigned int i;
- struct ieee80211_supported_band *sband;
- struct reg_beacon *reg_beacon;
-
- assert_cfg80211_lock();
-
- if (list_empty(&reg_beacon_list))
- return;
-
- list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
- if (!wiphy->bands[reg_beacon->chan.band])
- continue;
- sband = wiphy->bands[reg_beacon->chan.band];
- for (i = 0; i < sband->n_channels; i++)
- handle_reg_beacon(wiphy, i, reg_beacon);
- }
-}
-
-static bool reg_is_world_roaming(struct wiphy *wiphy)
-{
- if (is_world_regdom(cfg80211_regdomain->alpha2) ||
- (wiphy->regd && is_world_regdom(wiphy->regd->alpha2)))
- return true;
- if (last_request &&
- last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)
- return true;
- return false;
-}
-
-/* Reap the advantages of previously found beacons */
-static void reg_process_beacons(struct wiphy *wiphy)
-{
- /*
- * Means we are just firing up cfg80211, so no beacons would
- * have been processed yet.
- */
- if (!last_request)
- return;
- if (!reg_is_world_roaming(wiphy))
- return;
- wiphy_update_beacon_reg(wiphy);
-}
-
-static bool is_ht40_not_allowed(struct ieee80211_channel *chan)
-{
- if (!chan)
- return true;
- if (chan->flags & IEEE80211_CHAN_DISABLED)
- return true;
- /* This would happen when regulatory rules disallow HT40 completely */
- if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40)))
- return true;
- return false;
-}
-
-static void reg_process_ht_flags_channel(struct wiphy *wiphy,
- enum ieee80211_band band,
- unsigned int chan_idx)
-{
- struct ieee80211_supported_band *sband;
- struct ieee80211_channel *channel;
- struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
- unsigned int i;
-
- assert_cfg80211_lock();
-
- sband = wiphy->bands[band];
- BUG_ON(chan_idx >= sband->n_channels);
- channel = &sband->channels[chan_idx];
-
- if (is_ht40_not_allowed(channel)) {
- channel->flags |= IEEE80211_CHAN_NO_HT40;
- return;
- }
-
- /*
- * We need to ensure the extension channels exist to
- * be able to use HT40- or HT40+, this finds them (or not)
- */
- for (i = 0; i < sband->n_channels; i++) {
- struct ieee80211_channel *c = &sband->channels[i];
- if (c->center_freq == (channel->center_freq - 20))
- channel_before = c;
- if (c->center_freq == (channel->center_freq + 20))
- channel_after = c;
- }
-
- /*
- * Please note that this assumes target bandwidth is 20 MHz,
- * if that ever changes we also need to change the below logic
- * to include that as well.
- */
- if (is_ht40_not_allowed(channel_before))
- channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
- else
- channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
-
- if (is_ht40_not_allowed(channel_after))
- channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
- else
- channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
-}
-
-static void reg_process_ht_flags_band(struct wiphy *wiphy,
- enum ieee80211_band band)
-{
- unsigned int i;
- struct ieee80211_supported_band *sband;
-
- BUG_ON(!wiphy->bands[band]);
- sband = wiphy->bands[band];
-
- for (i = 0; i < sband->n_channels; i++)
- reg_process_ht_flags_channel(wiphy, band, i);
-}
-
-static void reg_process_ht_flags(struct wiphy *wiphy)
-{
- enum ieee80211_band band;
-
- if (!wiphy)
- return;
-
- for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
- if (wiphy->bands[band])
- reg_process_ht_flags_band(wiphy, band);
- }
-
-}
-
-static void wiphy_update_regulatory(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator)
-{
- enum ieee80211_band band;
-
- assert_reg_lock();
-
- if (ignore_reg_update(wiphy, initiator))
- return;
-
- for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
- if (wiphy->bands[band])
- handle_band(wiphy, band, initiator);
- }
-
-#ifdef CONFIG_MACH_PX
- last_request->processed = true;
-#endif
-
- reg_process_beacons(wiphy);
- reg_process_ht_flags(wiphy);
- if (wiphy->reg_notifier)
- wiphy->reg_notifier(wiphy, last_request);
-}
-
-void regulatory_update(struct wiphy *wiphy,
- enum nl80211_reg_initiator setby)
-{
- mutex_lock(&reg_mutex);
- wiphy_update_regulatory(wiphy, setby);
- mutex_unlock(&reg_mutex);
-}
-
-static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
-{
- struct cfg80211_registered_device *rdev;
-
- list_for_each_entry(rdev, &cfg80211_rdev_list, list)
- wiphy_update_regulatory(&rdev->wiphy, initiator);
-}
-
-static void handle_channel_custom(struct wiphy *wiphy,
- enum ieee80211_band band,
- unsigned int chan_idx,
- const struct ieee80211_regdomain *regd)
-{
- int r;
- u32 desired_bw_khz = MHZ_TO_KHZ(20);
- u32 bw_flags = 0;
- const struct ieee80211_reg_rule *reg_rule = NULL;
- const struct ieee80211_power_rule *power_rule = NULL;
- const struct ieee80211_freq_range *freq_range = NULL;
- struct ieee80211_supported_band *sband;
- struct ieee80211_channel *chan;
-
- assert_reg_lock();
-
- sband = wiphy->bands[band];
- BUG_ON(chan_idx >= sband->n_channels);
- chan = &sband->channels[chan_idx];
-
- r = freq_reg_info_regd(wiphy,
- MHZ_TO_KHZ(chan->center_freq),
- desired_bw_khz,
- &reg_rule,
- regd);
-
- if (r) {
- REG_DBG_PRINT("Disabling freq %d MHz as custom "
- "regd has no rule that fits a %d MHz "
- "wide channel\n",
- chan->center_freq,
- KHZ_TO_MHZ(desired_bw_khz));
- chan->flags = IEEE80211_CHAN_DISABLED;
- return;
- }
-
- chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
-
- power_rule = &reg_rule->power_rule;
- freq_range = &reg_rule->freq_range;
-
- if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
- bw_flags = IEEE80211_CHAN_NO_HT40;
-
- chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
- chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
- chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
-}
-
-static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,
- const struct ieee80211_regdomain *regd)
-{
- unsigned int i;
- struct ieee80211_supported_band *sband;
-
- BUG_ON(!wiphy->bands[band]);
- sband = wiphy->bands[band];
-
- for (i = 0; i < sband->n_channels; i++)
- handle_channel_custom(wiphy, band, i, regd);
-}
-
-/* Used by drivers prior to wiphy registration */
-void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
- const struct ieee80211_regdomain *regd)
-{
- enum ieee80211_band band;
- unsigned int bands_set = 0;
-
- mutex_lock(&reg_mutex);
- for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
- if (!wiphy->bands[band])
- continue;
- handle_band_custom(wiphy, band, regd);
- bands_set++;
- }
- mutex_unlock(&reg_mutex);
-
- /*
- * no point in calling this if it won't have any effect
- * on your device's supportd bands.
- */
- WARN_ON(!bands_set);
-}
-EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
-
-/*
- * 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
-
-/* This has the logic which determines when a new request
- * should be ignored. */
-static int ignore_request(struct wiphy *wiphy,
- struct regulatory_request *pending_request)
-{
- struct wiphy *last_wiphy = NULL;
-
- assert_cfg80211_lock();
-
- /* All initial requests are respected */
- if (!last_request)
- return 0;
-
- switch (pending_request->initiator) {
- case NL80211_REGDOM_SET_BY_CORE:
- return 0;
- case NL80211_REGDOM_SET_BY_COUNTRY_IE:
-
- last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
-
- if (unlikely(!is_an_alpha2(pending_request->alpha2)))
- return -EINVAL;
- if (last_request->initiator ==
- NL80211_REGDOM_SET_BY_COUNTRY_IE) {
- if (last_wiphy != wiphy) {
- /*
- * Two cards with two APs claiming different
- * Country IE alpha2s. We could
- * intersect them, but that seems unlikely
- * to be correct. Reject second one for now.
- */
- if (regdom_changes(pending_request->alpha2))
- return -EOPNOTSUPP;
- return -EALREADY;
- }
- /*
- * Two consecutive Country IE hints on the same wiphy.
- * This should be picked up early by the driver/stack
- */
- if (WARN_ON(regdom_changes(pending_request->alpha2)))
- return 0;
- return -EALREADY;
- }
- return 0;
- case NL80211_REGDOM_SET_BY_DRIVER:
- if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) {
- if (regdom_changes(pending_request->alpha2))
- return 0;
- return -EALREADY;
- }
-
- /*
- * This would happen if you unplug and plug your card
- * back in or if you add a new device for which the previously
- * loaded card also agrees on the regulatory domain.
- */
- if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- !regdom_changes(pending_request->alpha2))
- return -EALREADY;
-
- return REG_INTERSECT;
- case NL80211_REGDOM_SET_BY_USER:
- if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
- return REG_INTERSECT;
- /*
- * If the user knows better the user should set the regdom
- * to their country before the IE is picked up
- */
- if (last_request->initiator == NL80211_REGDOM_SET_BY_USER &&
- last_request->intersect)
- return -EOPNOTSUPP;
- /*
- * Process user requests only after previous user/driver/core
- * requests have been processed
- */
- if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE ||
- last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
- last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
- if (regdom_changes(last_request->alpha2))
- return -EAGAIN;
- }
-
- if (!regdom_changes(pending_request->alpha2))
- return -EALREADY;
-
- return 0;
- }
-
- return -EINVAL;
-}
-
-static void reg_set_request_processed(void)
-{
- bool need_more_processing = false;
-
- last_request->processed = true;
-
- spin_lock(&reg_requests_lock);
- if (!list_empty(&reg_requests_list))
- need_more_processing = true;
- spin_unlock(&reg_requests_lock);
-
- if (last_request->initiator == NL80211_REGDOM_SET_BY_USER)
- cancel_delayed_work_sync(&reg_timeout);
-
- if (need_more_processing)
- schedule_work(&reg_work);
-}
-
-/**
- * __regulatory_hint - hint to the wireless core a regulatory domain
- * @wiphy: if the hint comes from country information from an AP, this
- * is required to be set to the wiphy that received the information
- * @pending_request: the regulatory request currently being processed
- *
- * The Wireless subsystem can use this function to hint to the wireless core
- * what it believes should be the current regulatory domain.
- *
- * Returns zero if all went fine, %-EALREADY if a regulatory domain had
- * already been set or other standard error codes.
- *
- * Caller must hold &cfg80211_mutex and &reg_mutex
- */
-static int __regulatory_hint(struct wiphy *wiphy,
- struct regulatory_request *pending_request)
-{
- bool intersect = false;
- int r = 0;
-
- assert_cfg80211_lock();
-
- r = ignore_request(wiphy, pending_request);
-
- if (r == REG_INTERSECT) {
- if (pending_request->initiator ==
- NL80211_REGDOM_SET_BY_DRIVER) {
- r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
- if (r) {
- kfree(pending_request);
- return r;
- }
- }
- intersect = true;
- } else if (r) {
- /*
- * If the regulatory domain being requested by the
- * driver has already been set just copy it to the
- * wiphy
- */
- if (r == -EALREADY &&
- pending_request->initiator ==
- NL80211_REGDOM_SET_BY_DRIVER) {
- r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
- if (r) {
- kfree(pending_request);
- return r;
- }
- r = -EALREADY;
- goto new_request;
- }
- kfree(pending_request);
- return r;
- }
-
-new_request:
- kfree(last_request);
-
- last_request = pending_request;
- last_request->intersect = intersect;
-
- pending_request = NULL;
-
- if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
- user_alpha2[0] = last_request->alpha2[0];
- user_alpha2[1] = last_request->alpha2[1];
- }
-
- /* When r == REG_INTERSECT we do need to call CRDA */
- if (r < 0) {
- /*
- * Since CRDA will not be called in this case as we already
- * have applied the requested regulatory domain before we just
- * inform userspace we have processed the request
- */
- if (r == -EALREADY) {
- nl80211_send_reg_change_event(last_request);
- reg_set_request_processed();
- }
- return r;
- }
-
- return call_crda(last_request->alpha2);
-}
-
-/* This processes *all* regulatory hints */
-static void reg_process_hint(struct regulatory_request *reg_request)
-{
- int r = 0;
- struct wiphy *wiphy = NULL;
- enum nl80211_reg_initiator initiator = reg_request->initiator;
-
- BUG_ON(!reg_request->alpha2);
-
- if (wiphy_idx_valid(reg_request->wiphy_idx))
- wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
-
- if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- !wiphy) {
- kfree(reg_request);
- return;
- }
-
- r = __regulatory_hint(wiphy, reg_request);
- /* This is required so that the orig_* parameters are saved */
- if (r == -EALREADY && wiphy &&
- wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
- wiphy_update_regulatory(wiphy, initiator);
- return;
- }
-
- /*
- * We only time out user hints, given that they should be the only
- * source of bogus requests.
- */
- if (r != -EALREADY &&
- reg_request->initiator == NL80211_REGDOM_SET_BY_USER)
- schedule_delayed_work(&reg_timeout, msecs_to_jiffies(3142));
-}
-
-/*
- * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
- * Regulatory hints come on a first come first serve basis and we
- * must process each one atomically.
- */
-static void reg_process_pending_hints(void)
-{
- struct regulatory_request *reg_request;
-
- mutex_lock(&cfg80211_mutex);
- mutex_lock(&reg_mutex);
-
- /* When last_request->processed becomes true this will be rescheduled */
- if (last_request && !last_request->processed) {
- REG_DBG_PRINT("Pending regulatory request, waiting "
- "for it to be processed...\n");
- goto out;
- }
-
- spin_lock(&reg_requests_lock);
-
- if (list_empty(&reg_requests_list)) {
- spin_unlock(&reg_requests_lock);
- goto out;
- }
-
- reg_request = list_first_entry(&reg_requests_list,
- struct regulatory_request,
- list);
- list_del_init(&reg_request->list);
-
- spin_unlock(&reg_requests_lock);
-
- reg_process_hint(reg_request);
-
-out:
- mutex_unlock(&reg_mutex);
- mutex_unlock(&cfg80211_mutex);
-}
-
-/* Processes beacon hints -- this has nothing to do with country IEs */
-static void reg_process_pending_beacon_hints(void)
-{
- struct cfg80211_registered_device *rdev;
- struct reg_beacon *pending_beacon, *tmp;
-
- /*
- * No need to hold the reg_mutex here as we just touch wiphys
- * and do not read or access regulatory variables.
- */
- mutex_lock(&cfg80211_mutex);
-
- /* This goes through the _pending_ beacon list */
- spin_lock_bh(&reg_pending_beacons_lock);
-
- if (list_empty(&reg_pending_beacons)) {
- spin_unlock_bh(&reg_pending_beacons_lock);
- goto out;
- }
-
- list_for_each_entry_safe(pending_beacon, tmp,
- &reg_pending_beacons, list) {
-
- list_del_init(&pending_beacon->list);
-
- /* Applies the beacon hint to current wiphys */
- list_for_each_entry(rdev, &cfg80211_rdev_list, list)
- wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
-
- /* Remembers the beacon hint for new wiphys or reg changes */
- list_add_tail(&pending_beacon->list, &reg_beacon_list);
- }
-
- spin_unlock_bh(&reg_pending_beacons_lock);
-out:
- mutex_unlock(&cfg80211_mutex);
-}
-
-static void reg_todo(struct work_struct *work)
-{
- reg_process_pending_hints();
- reg_process_pending_beacon_hints();
-}
-
-static void queue_regulatory_request(struct regulatory_request *request)
-{
- if (isalpha(request->alpha2[0]))
- request->alpha2[0] = toupper(request->alpha2[0]);
- if (isalpha(request->alpha2[1]))
- request->alpha2[1] = toupper(request->alpha2[1]);
-
- spin_lock(&reg_requests_lock);
- list_add_tail(&request->list, &reg_requests_list);
- spin_unlock(&reg_requests_lock);
-
- schedule_work(&reg_work);
-}
-
-/*
- * Core regulatory hint -- happens during cfg80211_init()
- * and when we restore regulatory settings.
- */
-static int regulatory_hint_core(const char *alpha2)
-{
- struct regulatory_request *request;
-
- kfree(last_request);
- last_request = NULL;
-
- request = kzalloc(sizeof(struct regulatory_request),
- GFP_KERNEL);
- if (!request)
- return -ENOMEM;
-
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_CORE;
-
- queue_regulatory_request(request);
-
- return 0;
-}
-
-/* User hints */
-int regulatory_hint_user(const char *alpha2)
-{
- struct regulatory_request *request;
-
- BUG_ON(!alpha2);
-
- request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
- if (!request)
- return -ENOMEM;
-
- request->wiphy_idx = WIPHY_IDX_STALE;
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_USER;
-
- queue_regulatory_request(request);
-
- return 0;
-}
-
-/* Driver hints */
-int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
-{
- struct regulatory_request *request;
-
- BUG_ON(!alpha2);
- BUG_ON(!wiphy);
-
- request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
- if (!request)
- return -ENOMEM;
-
- request->wiphy_idx = get_wiphy_idx(wiphy);
-
- /* Must have registered wiphy first */
- BUG_ON(!wiphy_idx_valid(request->wiphy_idx));
-
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
-
- queue_regulatory_request(request);
-
- return 0;
-}
-EXPORT_SYMBOL(regulatory_hint);
-
-/*
- * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
- * therefore cannot iterate over the rdev list here.
- */
-void regulatory_hint_11d(struct wiphy *wiphy,
- enum ieee80211_band band,
- u8 *country_ie,
- u8 country_ie_len)
-{
- char alpha2[2];
- enum environment_cap env = ENVIRON_ANY;
- struct regulatory_request *request;
-
- mutex_lock(&reg_mutex);
-
- if (unlikely(!last_request))
- goto out;
-
- /* IE len must be evenly divisible by 2 */
- if (country_ie_len & 0x01)
- goto out;
-
- if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
- goto out;
-
- alpha2[0] = country_ie[0];
- alpha2[1] = country_ie[1];
-
- if (country_ie[2] == 'I')
- env = ENVIRON_INDOOR;
- else if (country_ie[2] == 'O')
- env = ENVIRON_OUTDOOR;
-
- /*
- * We will run this only upon a successful connection on cfg80211.
- * We leave conflict resolution to the workqueue, where can hold
- * cfg80211_mutex.
- */
- if (likely(last_request->initiator ==
- NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- wiphy_idx_valid(last_request->wiphy_idx)))
- goto out;
-
- request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
- if (!request)
- goto out;
-
- request->wiphy_idx = get_wiphy_idx(wiphy);
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
- request->country_ie_env = env;
-
- mutex_unlock(&reg_mutex);
-
- queue_regulatory_request(request);
-
- return;
-
-out:
- mutex_unlock(&reg_mutex);
-}
-
-static void restore_alpha2(char *alpha2, bool reset_user)
-{
- /* indicates there is no alpha2 to consider for restoration */
- alpha2[0] = '9';
- alpha2[1] = '7';
-
- /* The user setting has precedence over the module parameter */
- if (is_user_regdom_saved()) {
- /* Unless we're asked to ignore it and reset it */
- if (reset_user) {
- REG_DBG_PRINT("Restoring regulatory settings "
- "including user preference\n");
- user_alpha2[0] = '9';
- user_alpha2[1] = '7';
-
- /*
- * If we're ignoring user settings, we still need to
- * check the module parameter to ensure we put things
- * back as they were for a full restore.
- */
- if (!is_world_regdom(ieee80211_regdom)) {
- REG_DBG_PRINT("Keeping preference on "
- "module parameter ieee80211_regdom: %c%c\n",
- ieee80211_regdom[0],
- ieee80211_regdom[1]);
- alpha2[0] = ieee80211_regdom[0];
- alpha2[1] = ieee80211_regdom[1];
- }
- } else {
- REG_DBG_PRINT("Restoring regulatory settings "
- "while preserving user preference for: %c%c\n",
- user_alpha2[0],
- user_alpha2[1]);
- alpha2[0] = user_alpha2[0];
- alpha2[1] = user_alpha2[1];
- }
- } else if (!is_world_regdom(ieee80211_regdom)) {
- REG_DBG_PRINT("Keeping preference on "
- "module parameter ieee80211_regdom: %c%c\n",
- ieee80211_regdom[0],
- ieee80211_regdom[1]);
- alpha2[0] = ieee80211_regdom[0];
- alpha2[1] = ieee80211_regdom[1];
- } else
- REG_DBG_PRINT("Restoring regulatory settings\n");
-}
-
-/*
- * Restoring regulatory settings involves ingoring any
- * possibly stale country IE information and user regulatory
- * settings if so desired, this includes any beacon hints
- * learned as we could have traveled outside to another country
- * after disconnection. To restore regulatory settings we do
- * exactly what we did at bootup:
- *
- * - send a core regulatory hint
- * - send a user regulatory hint if applicable
- *
- * Device drivers that send a regulatory hint for a specific country
- * keep their own regulatory domain on wiphy->regd so that does does
- * not need to be remembered.
- */
-static void restore_regulatory_settings(bool reset_user)
-{
- char alpha2[2];
- struct reg_beacon *reg_beacon, *btmp;
- struct regulatory_request *reg_request, *tmp;
- LIST_HEAD(tmp_reg_req_list);
-
- mutex_lock(&cfg80211_mutex);
- mutex_lock(&reg_mutex);
-
- reset_regdomains();
- restore_alpha2(alpha2, reset_user);
-
- /*
- * If there's any pending requests we simply
- * stash them to a temporary pending queue and
- * add then after we've restored regulatory
- * settings.
- */
- spin_lock(&reg_requests_lock);
- if (!list_empty(&reg_requests_list)) {
- list_for_each_entry_safe(reg_request, tmp,
- &reg_requests_list, list) {
- if (reg_request->initiator !=
- NL80211_REGDOM_SET_BY_USER)
- continue;
- list_del(&reg_request->list);
- list_add_tail(&reg_request->list, &tmp_reg_req_list);
- }
- }
- spin_unlock(&reg_requests_lock);
-
- /* Clear beacon hints */
- spin_lock_bh(&reg_pending_beacons_lock);
- if (!list_empty(&reg_pending_beacons)) {
- list_for_each_entry_safe(reg_beacon, btmp,
- &reg_pending_beacons, list) {
- list_del(&reg_beacon->list);
- kfree(reg_beacon);
- }
- }
- spin_unlock_bh(&reg_pending_beacons_lock);
-
- if (!list_empty(&reg_beacon_list)) {
- list_for_each_entry_safe(reg_beacon, btmp,
- &reg_beacon_list, list) {
- list_del(&reg_beacon->list);
- kfree(reg_beacon);
- }
- }
-
- /* First restore to the basic regulatory settings */
- cfg80211_regdomain = cfg80211_world_regdom;
-
- mutex_unlock(&reg_mutex);
- mutex_unlock(&cfg80211_mutex);
-
- regulatory_hint_core(cfg80211_regdomain->alpha2);
-
- /*
- * This restores the ieee80211_regdom module parameter
- * preference or the last user requested regulatory
- * settings, user regulatory settings takes precedence.
- */
- if (is_an_alpha2(alpha2))
- regulatory_hint_user(user_alpha2);
-
- if (list_empty(&tmp_reg_req_list))
- return;
-
- mutex_lock(&cfg80211_mutex);
- mutex_lock(&reg_mutex);
-
- spin_lock(&reg_requests_lock);
- list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) {
- REG_DBG_PRINT("Adding request for country %c%c back "
- "into the queue\n",
- reg_request->alpha2[0],
- reg_request->alpha2[1]);
- list_del(&reg_request->list);
- list_add_tail(&reg_request->list, &reg_requests_list);
- }
- spin_unlock(&reg_requests_lock);
-
- mutex_unlock(&reg_mutex);
- mutex_unlock(&cfg80211_mutex);
-
- REG_DBG_PRINT("Kicking the queue\n");
-
- schedule_work(&reg_work);
-}
-
-void regulatory_hint_disconnect(void)
-{
- REG_DBG_PRINT("All devices are disconnected, going to "
- "restore regulatory settings\n");
- restore_regulatory_settings(false);
-}
-
-static bool freq_is_chan_12_13_14(u16 freq)
-{
- if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
- freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
- freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
- return true;
- return false;
-}
-
-int regulatory_hint_found_beacon(struct wiphy *wiphy,
- struct ieee80211_channel *beacon_chan,
- gfp_t gfp)
-{
- struct reg_beacon *reg_beacon;
-
- if (likely((beacon_chan->beacon_found ||
- (beacon_chan->flags & IEEE80211_CHAN_RADAR) ||
- (beacon_chan->band == IEEE80211_BAND_2GHZ &&
- !freq_is_chan_12_13_14(beacon_chan->center_freq)))))
- return 0;
-
- reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
- if (!reg_beacon)
- return -ENOMEM;
-
- REG_DBG_PRINT("Found new beacon on "
- "frequency: %d MHz (Ch %d) on %s\n",
- beacon_chan->center_freq,
- ieee80211_frequency_to_channel(beacon_chan->center_freq),
- wiphy_name(wiphy));
-
- memcpy(&reg_beacon->chan, beacon_chan,
- sizeof(struct ieee80211_channel));
-
-
- /*
- * Since we can be called from BH or and non-BH context
- * we must use spin_lock_bh()
- */
- spin_lock_bh(&reg_pending_beacons_lock);
- list_add_tail(&reg_beacon->list, &reg_pending_beacons);
- spin_unlock_bh(&reg_pending_beacons_lock);
-
- schedule_work(&reg_work);
-
- return 0;
-}
-
-static void print_rd_rules(const struct ieee80211_regdomain *rd)
-{
- unsigned int i;
- const struct ieee80211_reg_rule *reg_rule = NULL;
- const struct ieee80211_freq_range *freq_range = NULL;
- const struct ieee80211_power_rule *power_rule = NULL;
-
- pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
-
- for (i = 0; i < rd->n_reg_rules; i++) {
- reg_rule = &rd->reg_rules[i];
- freq_range = &reg_rule->freq_range;
- power_rule = &reg_rule->power_rule;
-
- /*
- * There may not be documentation for max antenna gain
- * in certain regions
- */
- if (power_rule->max_antenna_gain)
- pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- freq_range->max_bandwidth_khz,
- power_rule->max_antenna_gain,
- power_rule->max_eirp);
- else
- pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- freq_range->max_bandwidth_khz,
- power_rule->max_eirp);
- }
-}
-
-static void print_regdomain(const struct ieee80211_regdomain *rd)
-{
-
- if (is_intersected_alpha2(rd->alpha2)) {
-
- if (last_request->initiator ==
- NL80211_REGDOM_SET_BY_COUNTRY_IE) {
- struct cfg80211_registered_device *rdev;
- rdev = cfg80211_rdev_by_wiphy_idx(
- last_request->wiphy_idx);
- if (rdev) {
- pr_info("Current regulatory domain updated by AP to: %c%c\n",
- rdev->country_ie_alpha2[0],
- rdev->country_ie_alpha2[1]);
- } else
- pr_info("Current regulatory domain intersected:\n");
- } else
- pr_info("Current regulatory domain intersected:\n");
- } else if (is_world_regdom(rd->alpha2))
- pr_info("World regulatory domain updated:\n");
- else {
- if (is_unknown_alpha2(rd->alpha2))
- pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
- else
- pr_info("Regulatory domain changed to country: %c%c\n",
- rd->alpha2[0], rd->alpha2[1]);
- }
- print_rd_rules(rd);
-}
-
-static void print_regdomain_info(const struct ieee80211_regdomain *rd)
-{
- pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
- print_rd_rules(rd);
-}
-
-/* Takes ownership of rd only if it doesn't fail */
-static int __set_regdom(const struct ieee80211_regdomain *rd)
-{
- const struct ieee80211_regdomain *intersected_rd = NULL;
- struct cfg80211_registered_device *rdev = NULL;
- struct wiphy *request_wiphy;
- /* Some basic sanity checks first */
-
- if (is_world_regdom(rd->alpha2)) {
- if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
- return -EINVAL;
- update_world_regdomain(rd);
- return 0;
- }
-
- if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
- !is_unknown_alpha2(rd->alpha2))
- return -EINVAL;
-
- if (!last_request)
- return -EINVAL;
-
- /*
- * Lets only bother proceeding on the same alpha2 if the current
- * rd is non static (it means CRDA was present and was used last)
- * and the pending request came in from a country IE
- */
- if (last_request->initiator != NL80211_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 (!regdom_changes(rd->alpha2))
- return -EINVAL;
- }
-
- /*
- * Now lets set the regulatory domain, update all driver channels
- * and finally inform them of what we have done, in case they want
- * to review or adjust their own settings based on their own
- * internal EEPROM data
- */
-
- if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
- return -EINVAL;
-
- if (!is_valid_rd(rd)) {
- pr_err("Invalid regulatory domain detected:\n");
- print_regdomain_info(rd);
- return -EINVAL;
- }
-
- request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
-
- if (!last_request->intersect) {
- int r;
-
- if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) {
- reset_regdomains();
- cfg80211_regdomain = rd;
- return 0;
- }
-
- /*
- * For a driver hint, lets copy the regulatory domain the
- * driver wanted to the wiphy to deal with conflicts
- */
-
- /*
- * Userspace could have sent two replies with only
- * one kernel request.
- */
- if (request_wiphy->regd)
- return -EALREADY;
-
- r = reg_copy_regd(&request_wiphy->regd, rd);
- if (r)
- return r;
-
- reset_regdomains();
- cfg80211_regdomain = rd;
- return 0;
- }
-
- /* Intersection requires a bit more work */
-
- if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
-
- intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
- if (!intersected_rd)
- return -EINVAL;
-
- /*
- * We can trash what CRDA provided now.
- * However if a driver requested this specific regulatory
- * domain we keep it for its private use
- */
- if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER)
- request_wiphy->regd = rd;
- else
- kfree(rd);
-
- rd = NULL;
-
- reset_regdomains();
- cfg80211_regdomain = intersected_rd;
-
- return 0;
- }
-
- if (!intersected_rd)
- return -EINVAL;
-
- rdev = wiphy_to_dev(request_wiphy);
-
- rdev->country_ie_alpha2[0] = rd->alpha2[0];
- rdev->country_ie_alpha2[1] = rd->alpha2[1];
- rdev->env = last_request->country_ie_env;
-
- BUG_ON(intersected_rd == rd);
-
- kfree(rd);
- rd = NULL;
-
- reset_regdomains();
- cfg80211_regdomain = intersected_rd;
-
- return 0;
-}
-
-
-/*
- * Use this call to set the current regulatory domain. Conflicts with
- * multiple drivers can be ironed out later. Caller must've already
- * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
- */
-int set_regdom(const struct ieee80211_regdomain *rd)
-{
- int r;
-
- assert_cfg80211_lock();
-
- mutex_lock(&reg_mutex);
-
- /* Note that this doesn't update the wiphys, this is done below */
- r = __set_regdom(rd);
- if (r) {
- kfree(rd);
- mutex_unlock(&reg_mutex);
- return r;
- }
-
- /* This would make this whole thing pointless */
- if (!last_request->intersect)
- BUG_ON(rd != cfg80211_regdomain);
-
- /* update all wiphys now with the new established regulatory domain */
- update_all_wiphy_regulatory(last_request->initiator);
-
- print_regdomain(cfg80211_regdomain);
-
- nl80211_send_reg_change_event(last_request);
-
- reg_set_request_processed();
-
- mutex_unlock(&reg_mutex);
-
- return r;
-}
-
-#ifdef CONFIG_HOTPLUG
-int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- if (last_request && !last_request->processed) {
- if (add_uevent_var(env, "COUNTRY=%c%c",
- last_request->alpha2[0],
- last_request->alpha2[1]))
- return -ENOMEM;
- }
-
- return 0;
-}
-#else
-int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- return -ENODEV;
-}
-#endif /* CONFIG_HOTPLUG */
-
-/* Caller must hold cfg80211_mutex */
-void reg_device_remove(struct wiphy *wiphy)
-{
- struct wiphy *request_wiphy = NULL;
-
- assert_cfg80211_lock();
-
- mutex_lock(&reg_mutex);
-
- kfree(wiphy->regd);
-
- if (last_request)
- request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
-
- if (!request_wiphy || request_wiphy != wiphy)
- goto out;
-
- last_request->wiphy_idx = WIPHY_IDX_STALE;
- last_request->country_ie_env = ENVIRON_ANY;
-out:
- mutex_unlock(&reg_mutex);
-}
-
-static void reg_timeout_work(struct work_struct *work)
-{
- REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
- "restoring regulatory settings\n");
- restore_regulatory_settings(true);
-}
-
-int __init regulatory_init(void)
-{
- int err = 0;
-
- reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
- if (IS_ERR(reg_pdev))
- return PTR_ERR(reg_pdev);
-
- reg_pdev->dev.type = &reg_device_type;
-
- spin_lock_init(&reg_requests_lock);
- spin_lock_init(&reg_pending_beacons_lock);
-
- cfg80211_regdomain = cfg80211_world_regdom;
-
- user_alpha2[0] = '9';
- user_alpha2[1] = '7';
-
- /* We always try to get an update for the static regdomain */
- err = regulatory_hint_core(cfg80211_regdomain->alpha2);
- if (err) {
- if (err == -ENOMEM)
- return err;
- /*
- * N.B. kobject_uevent_env() can fail mainly for when we're out
- * memory which is handled and propagated appropriately above
- * but it can also fail during a netlink_broadcast() or during
- * early boot for call_usermodehelper(). For now treat these
- * errors as non-fatal.
- */
- pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
-#ifdef CONFIG_CFG80211_REG_DEBUG
- /* We want to find out exactly why when debugging */
- WARN_ON(err);
-#endif
- }
-
- /*
- * Finally, if the user set the module parameter treat it
- * as a user hint.
- */
- if (!is_world_regdom(ieee80211_regdom))
- regulatory_hint_user(ieee80211_regdom);
-
- return 0;
-}
-
-void /* __init_or_exit */ regulatory_exit(void)
-{
- struct regulatory_request *reg_request, *tmp;
- struct reg_beacon *reg_beacon, *btmp;
-
- cancel_work_sync(&reg_work);
- cancel_delayed_work_sync(&reg_timeout);
-
- mutex_lock(&cfg80211_mutex);
- mutex_lock(&reg_mutex);
-
- reset_regdomains();
-
- kfree(last_request);
-
- last_request = NULL;
- dev_set_uevent_suppress(&reg_pdev->dev, true);
-
- platform_device_unregister(reg_pdev);
-
- spin_lock_bh(&reg_pending_beacons_lock);
- if (!list_empty(&reg_pending_beacons)) {
- list_for_each_entry_safe(reg_beacon, btmp,
- &reg_pending_beacons, list) {
- list_del(&reg_beacon->list);
- kfree(reg_beacon);
- }
- }
- spin_unlock_bh(&reg_pending_beacons_lock);
-
- if (!list_empty(&reg_beacon_list)) {
- list_for_each_entry_safe(reg_beacon, btmp,
- &reg_beacon_list, list) {
- list_del(&reg_beacon->list);
- kfree(reg_beacon);
- }
- }
-
- spin_lock(&reg_requests_lock);
- if (!list_empty(&reg_requests_list)) {
- list_for_each_entry_safe(reg_request, tmp,
- &reg_requests_list, list) {
- list_del(&reg_request->list);
- kfree(reg_request);
- }
- }
- spin_unlock(&reg_requests_lock);
-
- mutex_unlock(&reg_mutex);
- mutex_unlock(&cfg80211_mutex);
-}