qcacmn: Handle no common channel between PCL and the favorite channel list

Handle the scenario where no common channel between PCL & the
favorite channel list is found.

Change-Id: I560d7ef861d89f3f4a0c63afacd0ffbf6aaa976e
CRs-Fixed: 2063060

umac/cmn_services/policy_mgr/src/wlan_policy_mgr_pcl.c

@@ -1571,10 +1571,13 @@ QDF_STATUS policy_mgr_get_sap_mandatory_channel(struct wlan_objmgr_psoc *psoc,
 		return status;
 	}
 
-	/* No existing SAP connection and hence a new SAP connection might be
-	 * coming up.
+	/*
+	 * Get inside below loop if no existing SAP connection and hence a new
+	 * SAP connection might be coming up. pcl.pcl_len can be 0 if no common
+	 * channel between PCL & mandatory channel list as well
 	 */
-	if (!pcl.pcl_len) {
+	if (!pcl.pcl_len && !policy_mgr_mode_specific_connection_count(psoc,
+		PM_SAP_MODE, NULL)) {
 		policy_mgr_debug("policy_mgr_get_pcl_for_existing_conn returned no pcl");
 		status = policy_mgr_get_pcl(psoc, PM_SAP_MODE,
 				pcl.pcl_list, &pcl.pcl_len,
@@ -1595,6 +1598,11 @@ QDF_STATUS policy_mgr_get_sap_mandatory_channel(struct wlan_objmgr_psoc *psoc,
 		return status;
 	}
 
+	if (!pcl.pcl_len) {
+		policy_mgr_err("No common channel between mandatory list & PCL");
+		return QDF_STATUS_E_FAILURE;
+	}
+
 	*chan = pcl.pcl_list[0];
 	policy_mgr_debug("mandatory channel:%d", *chan);