1 files changed, 8 insertions, 2 deletions
diff --git a/src/corelib/io/qprocess_win.cpp b/src/corelib/io/qprocess_win.cpp
index ed540f9e5b..96b39efe3a 100644
--- a/src/corelib/io/qprocess_win.cpp
+++ b/src/corelib/io/qprocess_win.cpp
@@ -805,17 +805,23 @@ qint64 QProcessPrivate::pipeWriterBytesToWrite() const
     return stdinChannel.writer ? stdinChannel.writer->bytesToWrite() : qint64(0);
 }
 
-qint64 QProcessPrivate::writeToStdin(const char *data, qint64 maxlen)
+bool QProcessPrivate::writeToStdin()
 {
     Q_Q(QProcess);
 
     if (!stdinChannel.writer) {
         stdinChannel.writer = new QWindowsPipeWriter(stdinChannel.pipe[1], q);
+        QObject::connect(stdinChannel.writer, &QWindowsPipeWriter::bytesWritten,
+                         q, &QProcess::bytesWritten);
         QObjectPrivate::connect(stdinChannel.writer, &QWindowsPipeWriter::canWrite,
                                 this, &QProcessPrivate::_q_canWrite);
+    } else {
+        if (stdinChannel.writer->isWriteOperationActive())
+            return true;
     }
 
-    return stdinChannel.writer->write(data, maxlen);
+    stdinChannel.writer->write(writeBuffer.read());
+    return true;
 }
 
 // Use ShellExecuteEx() to trigger an UAC prompt when CreateProcess()fails