From 52ee3ff79c5126f804ec4aaa1da696723aaacba2 Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Tue, 31 Jan 2017 14:15:34 +0100
Subject: [PATCH] update wait logic

---
 common/signal/timer.go | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/common/signal/timer.go b/common/signal/timer.go
index 0eb92d2ab..dfcbd849a 100644
--- a/common/signal/timer.go
+++ b/common/signal/timer.go
@@ -23,20 +23,17 @@ func (t *ActivityTimer) run() {
 	for {
 		select {
 		case <-time.After(t.timeout):
-			t.cancel()
-			return
 		case <-t.ctx.Done():
 			return
-		default:
-			select {
-			case <-time.After(t.timeout):
-				t.cancel()
-				return
-			case <-t.ctx.Done():
-				return
-			case <-t.updated:
-			}
 		}
+		select {
+		case <-t.updated:
+		// Updated keep waiting.
+		default:
+			t.cancel()
+			return
+		}
+
 	}
 }