From 7ad23e67e75be1607cd106e44fefc85e4114256c Mon Sep 17 00:00:00 2001
From: Jonathan Hui <jonhui@google.com>
Date: Sat, 13 Mar 2021 08:42:50 -0800
Subject: [PATCH] [radio-spinel] fix unsigned to signed conversion warning
 (#6281)

---
 src/lib/spinel/radio_spinel_impl.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/spinel/radio_spinel_impl.hpp b/src/lib/spinel/radio_spinel_impl.hpp
index d8f136ccb..612443bb7 100644
--- a/src/lib/spinel/radio_spinel_impl.hpp
+++ b/src/lib/spinel/radio_spinel_impl.hpp
@@ -2133,7 +2133,7 @@ void RadioSpinel<InterfaceType, ProcessContextType>::CalcRcpTimeOffset(void)
 
     VerifyOrExit(error == OT_ERROR_NONE, mRadioTimeRecalcStart = localRxTimestamp);
 
-    mRadioTimeOffset      = remoteTimestamp - ((localRxTimestamp / 2) + (localTxTimestamp / 2));
+    mRadioTimeOffset      = static_cast<int64_t>(remoteTimestamp - ((localRxTimestamp / 2) + (localTxTimestamp / 2)));
     mIsTimeSynced         = true;
     mRadioTimeRecalcStart = localRxTimestamp + RCP_TIME_OFFSET_CHECK_INTERVAL;