staging: comedi: das800: use comedi_request_region()

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

Remove the noise when the board is first attached as well as 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>

1 files changed, 3 insertions, 17 deletions

diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c
index 14975f8e5b49..d56584d171c8 100644
--- a/drivers/staging/comedi/drivers/das800.c
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -437,33 +437,19 @@ static int das800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
         const struct das800_board *thisboard = comedi_board(dev);
         struct das800_private *devpriv;
         struct comedi_subdevice *s;
-        unsigned long iobase = it->options[0];
         unsigned int irq = it->options[1];
         unsigned long irq_flags;
         int board;
         int ret;
 
-        dev_info(dev->class_dev, "das800: io 0x%lx\n", iobase);
-        if (irq)
-                dev_dbg(dev->class_dev, "irq %u\n", irq);
-
         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
         if (!devpriv)
                 return -ENOMEM;
         dev->private = devpriv;
 
-        if (iobase == 0) {
-                dev_err(dev->class_dev,
-                        "io base address required for das800\n");
-                return -EINVAL;
-        }
-
-        /* check if io addresses are available */
-        if (!request_region(iobase, DAS800_SIZE, "das800")) {
-                dev_err(dev->class_dev, "I/O port conflict\n");
-                return -EIO;
-        }
-        dev->iobase = iobase;
+        ret = comedi_request_region(dev, it->options[0], DAS800_SIZE);
+        if (ret)
+                return ret;
 
         board = das800_probe(dev);
         if (board < 0) {