Bluetooth: controller: Fix conn param req initiation check

Fixed the check related to initiating connection parameter
request procedure. This will avoid sending invalid repeated
dispatch of connection parameter request PDU.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/ctrl.c

@@ -8912,6 +8912,12 @@ static u32_t conn_update_req(struct connection *conn)
 		return 1;
 	}
 
+#if defined(CONFIG_BT_CTLR_CONN_PARAM_REQ)
+	if (conn->llcp_conn_param.req != conn->llcp_conn_param.ack) {
+		return 1;
+	}
+#endif /* CONFIG_BT_CTLR_CONN_PARAM_REQ */
+
 	if (!conn->role) {
 		conn->llcp.conn_upd.win_size = 1;
 		conn->llcp.conn_upd.win_offset_us = 0;
@@ -8945,7 +8951,7 @@ static u32_t conn_update_req(struct connection *conn)
 		conn->llcp_conn_param.ack--;
 
 		return 0;
-#endif /* !CONFIG_BT_CTLR_CONN_PARAM_REQ */
+#endif /* CONFIG_BT_CTLR_CONN_PARAM_REQ */
 
 	}