cfg80211: add regulatory_hint_core() to separate the core reg hint

This makes the core hint path more readable and allows for us to
later make it obvious under what circumstances we need locking or not.
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/wireless/reg.c

@@ -1050,11 +1050,7 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
 	case REGDOM_SET_BY_INIT:
 		return -EINVAL;
 	case REGDOM_SET_BY_CORE:
-		/*
-		 * Always respect new wireless core hints, should only happen
-		 * when updating the world regulatory domain at init.
-		 */
-		return 0;
+		return -EINVAL;
 	case REGDOM_SET_BY_COUNTRY_IE:
 		if (unlikely(!is_an_alpha2(alpha2)))
 			return -EINVAL;
@@ -1183,6 +1179,26 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
 	return call_crda(alpha2);
 }
 
+static int regulatory_hint_core(const char *alpha2)
+{
+	struct regulatory_request *request;
+
+	BUG_ON(last_request);
+
+	request = kzalloc(sizeof(struct regulatory_request),
+			  GFP_KERNEL);
+	if (!request)
+		return -ENOMEM;
+
+	request->alpha2[0] = alpha2[0];
+	request->alpha2[1] = alpha2[1];
+	request->initiator = REGDOM_SET_BY_CORE;
+
+	last_request = request;
+
+	return call_crda(alpha2);
+}
+
 void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
 {
 	int r;
@@ -1616,16 +1632,16 @@ int regulatory_init(void)
 	 * stuck with the static values. We ignore "EU" code as
 	 * that is not a valid ISO / IEC 3166 alpha2 */
 	if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
-		err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
-					ieee80211_regdom, 0, ENVIRON_ANY);
+		err = regulatory_hint_core(ieee80211_regdom);
 #else
 	cfg80211_regdomain = cfg80211_world_regdom;
 
-	err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", 0, ENVIRON_ANY);
-	if (err)
+	err = regulatory_hint_core("00");
+	if (err) {
 		printk(KERN_ERR "cfg80211: calling CRDA failed - "
 		       "unable to update world regulatory domain, "
 		       "using static definition\n");
+	}
 #endif
 
 	return 0;