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cfg80211: process driver regulatory requests on its own 

This makes the code easier to read and follow.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luis R. Rodriguez 2013-11-05 09:18:05 -08:00 committed by Johannes Berg
parent 0d97a61917
commit 21636c7faa
1 changed files with 86 additions and 17 deletions
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103
net/wireless/reg.c
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@ -1338,6 +1338,7 @@ get_reg_request_treatment(struct wiphy *wiphy,
switch (pending_request->initiator) {
case NL80211_REGDOM_SET_BY_CORE:
case NL80211_REGDOM_SET_BY_USER:
case NL80211_REGDOM_SET_BY_DRIVER:
return REG_REQ_IGNORE;
case NL80211_REGDOM_SET_BY_COUNTRY_IE:
if (reg_request_cell_base(lr)) {
@ -1372,23 +1373,6 @@ get_reg_request_treatment(struct wiphy *wiphy,
return REG_REQ_ALREADY_SET;
}
return REG_REQ_OK;
case NL80211_REGDOM_SET_BY_DRIVER:
if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
if (regdom_changes(pending_request->alpha2))
return REG_REQ_OK;
return REG_REQ_ALREADY_SET;
}
/*
* 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 (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
!regdom_changes(pending_request->alpha2))
return REG_REQ_ALREADY_SET;
return REG_REQ_INTERSECT;
}
return REG_REQ_IGNORE;
@ -1514,6 +1498,89 @@ reg_process_hint_user(struct regulatory_request *user_request)
return REG_REQ_OK;
}
static enum reg_request_treatment
__reg_process_hint_driver(struct regulatory_request *driver_request)
{
struct regulatory_request *lr = get_last_request();
if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
if (regdom_changes(driver_request->alpha2))
return REG_REQ_OK;
return REG_REQ_ALREADY_SET;
}
/*
* 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 (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
!regdom_changes(driver_request->alpha2))
return REG_REQ_ALREADY_SET;
return REG_REQ_INTERSECT;
}
/**
* reg_process_hint_driver - process driver regulatory requests
* @driver_request: a pending driver regulatory request
*
* The wireless subsystem can use this function to process
* a regulatory request issued by an 802.11 driver.
*
* Returns one of the different reg request treatment values.
*/
static enum reg_request_treatment
reg_process_hint_driver(struct wiphy *wiphy,
struct regulatory_request *driver_request)
{
const struct ieee80211_regdomain *regd;
enum reg_request_treatment treatment;
struct regulatory_request *lr;
treatment = __reg_process_hint_driver(driver_request);
switch (treatment) {
case REG_REQ_OK:
break;
case REG_REQ_IGNORE:
kfree(driver_request);
return treatment;
case REG_REQ_INTERSECT:
/* fall through */
case REG_REQ_ALREADY_SET:
regd = reg_copy_regd(get_cfg80211_regdom());
if (IS_ERR(regd)) {
kfree(driver_request);
return REG_REQ_IGNORE;
}
rcu_assign_pointer(wiphy->regd, regd);
}
lr = get_last_request();
if (lr != &core_request_world && lr)
kfree_rcu(lr, rcu_head);
driver_request->intersect = treatment == REG_REQ_INTERSECT;
driver_request->processed = false;
rcu_assign_pointer(last_request, driver_request);
/*
* 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 (treatment == REG_REQ_ALREADY_SET) {
nl80211_send_reg_change_event(driver_request);
reg_set_request_processed();
return treatment;
}
if (call_crda(driver_request->alpha2))
return REG_REQ_IGNORE;
return REG_REQ_OK;
}
/**
* __regulatory_hint - hint to the wireless core a regulatory domain
* @wiphy: if the hint comes from country information from an AP, this
@ -1637,6 +1704,8 @@ static void reg_process_hint(struct regulatory_request *reg_request)
schedule_delayed_work(&reg_timeout, msecs_to_jiffies(3142));
return;
case NL80211_REGDOM_SET_BY_DRIVER:
treatment = reg_process_hint_driver(wiphy, reg_request);
break;
case NL80211_REGDOM_SET_BY_COUNTRY_IE:
treatment = __regulatory_hint(wiphy, reg_request);
break;