From fbb174127c8f6a5c74db1d4d85e43e8467a16f1c Mon Sep 17 00:00:00 2001
From: Denis Shienkov <denis.shienkov@gmail.com>
Date: Thu, 7 Jul 2016 21:37:49 +0300
Subject: Start the write timer only when it is inactive

Change-Id: Ie6dd49bec6add204b45f15ff344ba6c92adedb0a
Reviewed-by: Sergey Belyashov <Sergey.Belyashov@gmail.com>
Reviewed-by: Alex Trotsenko <alex1973tr@gmail.com>
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>
---
 src/serialport/qserialport_win.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/serialport/qserialport_win.cpp b/src/serialport/qserialport_win.cpp
index ae32fcf..46fc9d9 100644
--- a/src/serialport/qserialport_win.cpp
+++ b/src/serialport/qserialport_win.cpp
@@ -627,7 +627,8 @@ qint64 QSerialPortPrivate::writeData(const char *data, qint64 maxSize)
             QObjectPrivate::connect(startAsyncWriteTimer, &QTimer::timeout, this, &QSerialPortPrivate::_q_startAsyncWrite);
             startAsyncWriteTimer->setSingleShot(true);
         }
-        startAsyncWriteTimer->start(0);
+        if (!startAsyncWriteTimer->isActive())
+            startAsyncWriteTimer->start();
     }
     return maxSize;
 }
-- 
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