staging: comedi: das16m1: use comedi_request_region()

Use comedi_request_region() to request the 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.

This driver does a second request_region() for the I/O space needed
by the 8255 chip. Modify the error message if that request fails so
it matches to format of the comedi_request_region() message.

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>

diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c
index 3c37a66..6c4fad5 100644 (file)
--- a/drivers/staging/comedi/drivers/das16m1.c
+++ b/drivers/staging/comedi/drivers/das16m1.c
@@ -571,26 +571,24 @@ static int das16m1_attach(struct comedi_device *dev,
        struct comedi_subdevice *s;
        int ret;
        unsigned int irq;
-       unsigned long iobase;
-
-       iobase = it->options[0];
 
        devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
        if (!devpriv)
                return -ENOMEM;
        dev->private = devpriv;
 
-       if (!request_region(iobase, DAS16M1_SIZE, dev->board_name)) {
-               comedi_error(dev, "I/O port conflict\n");
-               return -EIO;
-       }
-       if (!request_region(iobase + DAS16M1_82C55, DAS16M1_SIZE2,
+       ret = comedi_request_region(dev, it->options[0], DAS16M1_SIZE);
+       if (ret)
+               return ret;
+       /* Request an additional region for the 8255 */
+       if (!request_region(dev->iobase + DAS16M1_82C55, DAS16M1_SIZE2,
                            dev->board_name)) {
-               release_region(iobase, DAS16M1_SIZE);
-               comedi_error(dev, "I/O port conflict\n");
+               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);
                return -EIO;
        }
-       dev->iobase = iobase;
 
        /* now for the irq */
        irq = it->options[1];