diff options
| -rw-r--r-- | net/wireless/reg.c | 90 |
1 files changed, 21 insertions, 69 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 581273d86844..a78902d0d6c9 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -44,14 +44,13 @@ /* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */ struct regulatory_request { - struct list_head list; struct wiphy *wiphy; int granted; enum reg_set_by initiator; char alpha2[2]; }; -static LIST_HEAD(regulatory_requests); +static struct regulatory_request *last_request; /* To trigger userspace events */ static struct platform_device *reg_pdev; @@ -201,7 +200,7 @@ static void reset_regdomains(void) * core upon initialization */ static void update_world_regdomain(const struct ieee80211_regdomain *rd) { - BUG_ON(list_empty(®ulatory_requests)); + BUG_ON(!last_request); reset_regdomains(); @@ -302,15 +301,10 @@ static int call_crda(const char *alpha2) static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, char *alpha2, struct ieee80211_regdomain *rd) { - struct regulatory_request *last_request = NULL; - /* All initial requests are respected */ - if (list_empty(®ulatory_requests)) + if (!last_request) return 0; - last_request = list_first_entry(®ulatory_requests, - struct regulatory_request, list); - switch (set_by) { case REGDOM_SET_BY_INIT: return -EINVAL; @@ -320,7 +314,7 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, * anyway */ return 0; case REGDOM_SET_BY_COUNTRY_IE: - if (last_request->initiator == set_by) { + if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { if (last_request->wiphy != wiphy) { /* Two cards with two APs claiming different * different Country IE alpha2s! @@ -350,7 +344,7 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, return 1; case REGDOM_SET_BY_DRIVER: BUG_ON(!wiphy); - if (last_request->initiator == set_by) { + if (last_request->initiator == REGDOM_SET_BY_DRIVER) { /* Two separate drivers hinting different things, * this is possible if you have two devices present * on a system with different EEPROM regulatory @@ -376,8 +370,8 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, return 0; return 0; case REGDOM_SET_BY_USER: - if (last_request->initiator == set_by || - last_request->initiator == REGDOM_SET_BY_CORE) + if (last_request->initiator == REGDOM_SET_BY_USER || + last_request->initiator == REGDOM_SET_BY_CORE) return 0; /* Drivers can use their wiphy's reg_notifier() * to override any information */ @@ -392,26 +386,13 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, } } -static bool __reg_is_valid_request(const char *alpha2, - struct regulatory_request **request) -{ - struct regulatory_request *req; - if (list_empty(®ulatory_requests)) - return false; - list_for_each_entry(req, ®ulatory_requests, list) { - if (alpha2_equal(req->alpha2, alpha2)) { - *request = req; - return true; - } - } - return false; -} - /* Used by nl80211 before kmalloc'ing our regulatory domain */ bool reg_is_valid_request(const char *alpha2) { - struct regulatory_request *request = NULL; - return __reg_is_valid_request(alpha2, &request); + if (!last_request) + return false; + + return alpha2_equal(last_request->alpha2, alpha2); } /* Sanity check on a regulatory rule */ @@ -607,7 +588,8 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, request->initiator = set_by; request->wiphy = wiphy; - list_add_tail(&request->list, ®ulatory_requests); + kfree(last_request); + last_request = request; if (rd) break; r = call_crda(alpha2); @@ -711,12 +693,10 @@ void print_regdomain_info(const struct ieee80211_regdomain *rd) static int __set_regdom(const struct ieee80211_regdomain *rd) { - struct regulatory_request *request = NULL; - /* Some basic sanity checks first */ if (is_world_regdom(rd->alpha2)) { - if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request))) + if (WARN_ON(!reg_is_valid_request(rd->alpha2))) return -EINVAL; update_world_regdomain(rd); return 0; @@ -726,7 +706,7 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) !is_unknown_alpha2(rd->alpha2)) return -EINVAL; - if (list_empty(®ulatory_requests)) + if (!last_request) return -EINVAL; /* allow overriding the static definitions if CRDA is present */ @@ -739,13 +719,13 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) * to review or adjust their own settings based on their own * internal EEPROM data */ - if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request))) + if (WARN_ON(!reg_is_valid_request(rd->alpha2))) return -EINVAL; reset_regdomains(); /* Country IE parsing coming soon */ - switch (request->initiator) { + switch (last_request->initiator) { case REGDOM_SET_BY_CORE: case REGDOM_SET_BY_DRIVER: case REGDOM_SET_BY_USER: @@ -764,7 +744,7 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) /* Tada! */ cfg80211_regdomain = rd; - request->granted = 1; + last_request->granted = 1; return 0; } @@ -776,42 +756,18 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) * the passed rd. Caller must hold cfg80211_drv_mutex */ int set_regdom(const struct ieee80211_regdomain *rd) { - struct regulatory_request *this_request = NULL, *prev_request = NULL; int r; - if (!list_empty(®ulatory_requests)) - prev_request = list_first_entry(®ulatory_requests, - struct regulatory_request, list); - /* Note that this doesn't update the wiphys, this is done below */ r = __set_regdom(rd); if (r) return r; - BUG_ON((!__reg_is_valid_request(rd->alpha2, &this_request))); - - /* The initial standard core update of the world regulatory domain, no - * need to keep that request info around if it didn't fail. */ - if (is_world_regdom(rd->alpha2) && - this_request->initiator == REGDOM_SET_BY_CORE && - this_request->granted) { - list_del(&this_request->list); - kfree(this_request); - this_request = NULL; - } - - /* Remove old requests, we only leave behind the last one */ - if (prev_request) { - list_del(&prev_request->list); - kfree(prev_request); - prev_request = NULL; - } - /* This would make this whole thing pointless */ BUG_ON(rd != cfg80211_regdomain); /* update all wiphys now with the new established regulatory domain */ - update_all_wiphy_regulatory(this_request->initiator); + update_all_wiphy_regulatory(last_request->initiator); print_regdomain(rd); @@ -853,16 +809,12 @@ int regulatory_init(void) void regulatory_exit(void) { - struct regulatory_request *req, *req_tmp; - mutex_lock(&cfg80211_drv_mutex); reset_regdomains(); - list_for_each_entry_safe(req, req_tmp, ®ulatory_requests, list) { - list_del(&req->list); - kfree(req); - } + kfree(last_request); + platform_device_unregister(reg_pdev); mutex_unlock(&cfg80211_drv_mutex); |