win32: Add missing ClearCommError() error handling/reporting.

diff --git a/serialport.c b/serialport.c
index e935464013e2fb82db3f3bdb7955225ed70e8220..43dc4d3513e1230e2a34a3306de3ccb90bf5cf08 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -729,7 +729,8 @@ enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
 #endif
 
 #ifdef _WIN32
-       ClearCommError(port->hdl, &errors, &status);
+       if (ClearCommError(port->hdl, &errors, &status) == 0)
+               RETURN_FAIL("ClearCommError() failed");
 #endif
 
        ret = set_config(port, &data, &config);
@@ -1200,7 +1201,7 @@ enum sp_return sp_input_waiting(struct sp_port *port)
        COMSTAT comstat;
 
        if (ClearCommError(port->hdl, &errors, &comstat) == 0)
-               RETURN_FAIL("ClearComError() failed");
+               RETURN_FAIL("ClearCommError() failed");
        RETURN_VALUE("%d", comstat.cbInQue);
 #else
        int bytes_waiting;
@@ -1223,7 +1224,7 @@ enum sp_return sp_output_waiting(struct sp_port *port)
        COMSTAT comstat;
 
        if (ClearCommError(port->hdl, &errors, &comstat) == 0)
-               RETURN_FAIL("ClearComError() failed");
+               RETURN_FAIL("ClearCommError() failed");
        RETURN_VALUE("%d", comstat.cbOutQue);
 #else
        int bytes_waiting;