Return from the loop if a port name is found

The function devicePortName() search in the Registry the names of ports
by names of registry keys. At first looks for value of a key of "PortName",
and then of "PortNumber" key.

Thus, the first found value shall stop search and do not try to continue.

Tested on Windows 7/8 using Qt4 and then Qt5.

Change-Id: I98b00ff043a3b08476fec0a57b0d36ce65fc8d63
Reviewed-by: Sergey Belyashov <Sergey.Belyashov@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/serialport/qserialportinfo_win.cpp b/src/serialport/qserialportinfo_win.cpp
index dbef314..0e01ac7 100644
--- a/src/serialport/qserialportinfo_win.cpp
+++ b/src/serialport/qserialportinfo_win.cpp
@@ -182,6 +182,9 @@ static QString devicePortName(HDEVINFO deviceInfoSet, PSP_DEVINFO_DATA deviceInf
             }
             break;
         }
+
+        if (!portName.isEmpty())
+            break;
     }
     ::RegCloseKey(key);
     return portName;