qcacld-3.0: Fix scenario for updating the country

When updating the country to be the same value, the function will return
failure. This causes a crash in the wifi start up. Add check to see if
the country code is the same to avoid calling the API.

Change-Id: I7be11857fd9cc87b65f6c598d842a9ed5c024f59
CRs-fixed: 2896855

core/hdd/src/wlan_hdd_regulatory.c

@@ -742,6 +742,8 @@ int hdd_reg_set_country(struct hdd_context *hdd_ctx, char *country_code)
 {
 	QDF_STATUS status;
 	uint8_t cc[REG_ALPHA2_LEN + 1];
+	uint8_t alpha2[REG_ALPHA2_LEN + 1];
+	enum country_src cc_src;
 
 	if (!country_code) {
 		hdd_err("country_code is null");
@@ -751,6 +753,14 @@ int hdd_reg_set_country(struct hdd_context *hdd_ctx, char *country_code)
 	qdf_mem_copy(cc, country_code, REG_ALPHA2_LEN);
 	cc[REG_ALPHA2_LEN] = '\0';
 
+	if (!qdf_mem_cmp(country_code, hdd_ctx->reg.alpha2, REG_ALPHA2_LEN)) {
+		cc_src = ucfg_reg_get_cc_and_src(hdd_ctx->psoc, alpha2);
+		if (cc_src == SOURCE_USERSPACE || cc_src == SOURCE_CORE) {
+			hdd_debug("country code is the same");
+			return 0;
+		}
+	}
+
 	qdf_event_reset(&hdd_ctx->regulatory_update_event);
 	qdf_mutex_acquire(&hdd_ctx->regulatory_status_lock);
 	hdd_ctx->is_regulatory_update_in_progress = true;