staging: comedi: das16m1: use __comedi_request_region()

Use __comedi_request_region() to request the additional I/O region
used by this driver.

Remove the error message when the request_region() fails,
comedi_request_reqion() will output the error message if necessary.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/das16m1.c

@@ -581,12 +581,11 @@ static int das16m1_attach(struct comedi_device *dev,
 	if (ret)
 		return ret;
 	/* Request an additional region for the 8255 */
-	if (!request_region(dev->iobase + DAS16M1_82C55, DAS16M1_SIZE2,
-			    dev->board_name)) {
+	ret = __comedi_request_region(dev, dev->iobase + DAS16M1_82C55,
+				      DAS16M1_SIZE2);
+	if (ret) {
 		release_region(dev->iobase, DAS16M1_SIZE);
-		dev_warn(dev->class_dev, "%s: I/O port conflict (%#lx,%d)\n",
-			 dev->board_name,
-			 dev->iobase + DAS16M1_82C55, DAS16M1_SIZE2);
+		dev->iobase = 0;
 		return -EIO;
 	}