From f849ce37c68c16688d57923ac7c01482236af459 Mon Sep 17 00:00:00 2001
From: Abtin Keshavarzian <abtink@google.com>
Date: Wed, 18 Apr 2018 09:00:10 -0700
Subject: [PATCH] [mac] on ack timeout switch the radio to receive mode (#2666)

This commit changes the `Mac` logic for handling ack timeout to put
the radio in receive mode before invoking the `HandleTransmitDone()`
callback with the `OT_ERROR_NO_ACK` status. This ensures that the
radio can be put to sleep after a no-ack error.
---
 src/core/mac/mac.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/mac/mac.cpp b/src/core/mac/mac.cpp
index 3700e0111..de9a634c2 100644
--- a/src/core/mac/mac.cpp
+++ b/src/core/mac/mac.cpp
@@ -1455,6 +1455,7 @@ void Mac::HandleMacTimer(void)
 
     case kOperationTransmitData:
         otLogDebgMac(GetInstance(), "Ack timer fired");
+        RadioReceive(mTxFrame->mChannel);
         HandleTransmitDone(mTxFrame, NULL, OT_ERROR_NO_ACK);
         break;