From 8487f6329cce7e766ef12a8fe7e20e436e51d357 Mon Sep 17 00:00:00 2001
From: orientlu <orientlu@tencent.com>
Date: Tue, 15 Oct 2019 16:05:54 +0800
Subject: [PATCH] fix #138

---
 internal/backend/semtechudp/backend.go | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/internal/backend/semtechudp/backend.go b/internal/backend/semtechudp/backend.go
index 9bb9167f..dfd3ef43 100644
--- a/internal/backend/semtechudp/backend.go
+++ b/internal/backend/semtechudp/backend.go
@@ -422,9 +422,6 @@ func (b *Backend) handleTXACK(up udpPacket) error {
 		return err
 	}
 
-	b.RLock()
-	defer b.RUnlock()
-
 	downID := b.tokenMap[p.RandomToken]
 
 	if p.Payload != nil && p.Payload.TXPKACK.Error != "" && p.Payload.TXPKACK.Error != "NONE" {