From 200f9452aa9b3e2a343b3b30ef53c66df7b201bb Mon Sep 17 00:00:00 2001
From: Timofei Istomin <tim.ist@gmail.com>
Date: Fri, 9 Oct 2015 18:10:58 +0200
Subject: [PATCH] Disable acknowledgements if 0 retries requested

PacketLink.setRetries(msg, 0) should disable ACKs
even if they were enabled for this msg before.
---
 tos/chips/cc2420/link/PacketLinkP.nc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tos/chips/cc2420/link/PacketLinkP.nc b/tos/chips/cc2420/link/PacketLinkP.nc
index 9cccab03b2..48a6977dea 100644
--- a/tos/chips/cc2420/link/PacketLinkP.nc
+++ b/tos/chips/cc2420/link/PacketLinkP.nc
@@ -138,6 +138,9 @@ implementation {
       if(call PacketLink.getRetries(msg) > 0) {
         call PacketAcknowledgements.requestAck(msg);
       }
+      else {
+        call PacketAcknowledgements.noAck(msg);
+      }
      
       if((error = call SubSend.send(msg, len)) != SUCCESS) {
         call SendState.toIdle();