commit f976376de0d6a9697fb635369f12ae00251f4566
author Luis R. Rodriguez <lrodriguez@atheros.com> Thu Jan 22 15:05:52 2009 -0800
committer John W. Linville <linville@tuxdriver.com> Thu Jan 29 16:01:18 2009 -0500
tree 11e94926ba6da6ed420bce7c82276e705838dca5
parent 716f9392e2b84cacc18cc11f7427cb98adeb1c3d

cfg80211: Allow for strict regulatory settings

This allows drivers to request strict regulatory settings to
be applied to its devices. This is desirable for devices where
proper calibration and compliance can only be gauranteed for
for the device's programmed regulatory domain. Regulatory
domain settings will be ignored until the device's own
regulatory domain is properly configured. If no regulatory
domain is received only the world regulatory domain will be
applied -- if OLD_REG (default to "US") is not enabled. If
OLD_REG behaviour is not acceptable to drivers they must
update their wiphy with a custom reuglatory prior to wiphy
registration.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/wireless/reg.c

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index cad4daa..89e0d8b 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -867,6 +867,22 @@
 
 	power_rule = &reg_rule->power_rule;
 
+	if (last_request->initiator == REGDOM_SET_BY_DRIVER &&
+	    last_request->wiphy && last_request->wiphy == wiphy &&
+	    last_request->wiphy->strict_regulatory) {
+		/* This gaurantees 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);
+		chan->max_antenna_gain = chan->orig_mag =
+			(int) MBI_TO_DBI(power_rule->max_antenna_gain);
+		chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
+		chan->max_power = chan->orig_mpwr =
+			(int) MBM_TO_DBM(power_rule->max_eirp);
+		return;
+	}
+
 	chan->flags = flags | map_regdom_flags(reg_rule->flags);
 	chan->max_antenna_gain = min(chan->orig_mag,
 		(int) MBI_TO_DBI(power_rule->max_antenna_gain));
@@ -897,6 +913,11 @@
 	if (setby == REGDOM_SET_BY_CORE &&
 		  wiphy->custom_regulatory)
 		return true;
+	/* wiphy->regd will be set once the device has its own
+	 * desired regulatory domain set */
+	if (wiphy->strict_regulatory && !wiphy->regd &&
+	    !is_world_regdom(last_request->alpha2))
+		return true;
 	return false;
 }
 
@@ -1155,10 +1176,15 @@
 
 void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
 {
+	int r;
 	BUG_ON(!alpha2);
 
 	mutex_lock(&cfg80211_drv_mutex);
-	__regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, 0, ENVIRON_ANY);
+	r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER,
+		alpha2, 0, ENVIRON_ANY);
+	/* This is required so that the orig_* parameters are saved */
+	if (r == -EALREADY && wiphy->strict_regulatory)
+		wiphy_update_regulatory(wiphy, REGDOM_SET_BY_DRIVER);
 	mutex_unlock(&cfg80211_drv_mutex);
 }
 EXPORT_SYMBOL(regulatory_hint);