From 27081335f09f7e34e3fc7970badfa394ad8fd6ae Mon Sep 17 00:00:00 2001
From: Adam Eliot <1302456+aeliot@users.noreply.github.com>
Date: Mon, 2 Oct 2017 21:52:49 -0700
Subject: [PATCH] [link-quality] last RSSI ignore invalid RSSI (#2240)

* Add in filtering for invalid 127 RSSI in the last rssi field
---
 src/core/thread/link_quality.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/thread/link_quality.cpp b/src/core/thread/link_quality.cpp
index 593fdb07f..36cf00a13 100644
--- a/src/core/thread/link_quality.cpp
+++ b/src/core/thread/link_quality.cpp
@@ -154,6 +154,8 @@ void LinkQualityInfo::AddRss(int8_t aNoiseFloor, int8_t aRss)
 {
     uint8_t oldLinkQuality = kNoLinkQuality;
 
+    VerifyOrExit(aRss != OT_RADIO_RSSI_INVALID);
+
     mLastRss = aRss;
 
     if (mRssAverager.HasAverage())