From 042b0065de036737641d7052d9d1e1efa79dcd74 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Thu, 13 Sep 2018 14:10:52 +0800
Subject: [PATCH] runtime: print destination up message for local RTIO

---
 artiq/firmware/runtime/rtio_mgt.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/artiq/firmware/runtime/rtio_mgt.rs b/artiq/firmware/runtime/rtio_mgt.rs
index c6ba76d43..f9df23b38 100644
--- a/artiq/firmware/runtime/rtio_mgt.rs
+++ b/artiq/firmware/runtime/rtio_mgt.rs
@@ -208,7 +208,10 @@ pub mod drtio {
 
             if hop == 0 {
                 /* local RTIO */
-                up_destinations[destination] = true;
+                if !up_destinations[destination] {
+                    info!("[DEST#{}] destination is up", destination);
+                    up_destinations[destination] = true;
+                }
             } else if hop as usize <= csr::DRTIO.len() {
                 let linkno = hop - 1;
                 if up_destinations[destination] {