Abort waitForReadyRead() when there is an error

When in readNotification() or completeAsyncWrite() an error
is emitted and the loop is not exited, this error signal
will flood the eventloop.

Change-Id: I77b8a4c337041258862b19a07917bef059c11cc1
Reviewed-by: Sergey Belyashov <Sergey.Belyashov@gmail.com>
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/serialport/qserialport_unix.cpp b/src/serialport/qserialport_unix.cpp
index 70c160b..f7d2af9 100644
--- a/src/serialport/qserialport_unix.cpp
+++ b/src/serialport/qserialport_unix.cpp
@@ -424,6 +424,7 @@ bool QSerialPortPrivate::waitForReadyRead(int msecs)
 
     stopWatch.start();
 
+    error = QSerialPort::NoError;
     do {
         bool readyToRead = false;
         bool readyToWrite = false;
@@ -443,6 +444,9 @@ bool QSerialPortPrivate::waitForReadyRead(int msecs)
         if (readyToWrite)
             completeAsyncWrite();
 
+        if (error != QSerialPort::NoError)
+            return false;
+
     } while (msecs == -1 || timeoutValue(msecs, stopWatch.elapsed()) > 0);
     return false;
 }