staging: comedi: das1800: 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.

This driver does a second request_region() for the additional I/O space
used on the 'ao' type boards. 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>

1 files changed, 11 insertions, 32 deletions

diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c
index 1e90287303d8..cf265c1be7d8 100644
--- a/drivers/staging/comedi/drivers/das1800.c
+++ b/drivers/staging/comedi/drivers/das1800.c
@@ -1511,7 +1511,6 @@ static int das1800_attach(struct comedi_device *dev,
         const struct das1800_board *thisboard = comedi_board(dev);
         struct das1800_private *devpriv;
         struct comedi_subdevice *s;
-        unsigned long iobase = it->options[0];
         unsigned int irq = it->options[1];
         unsigned int dma0 = it->options[2];
         unsigned int dma1 = it->options[3];
@@ -1524,31 +1523,9 @@ static int das1800_attach(struct comedi_device *dev,
                 return -ENOMEM;
         dev->private = devpriv;
 
-        printk(KERN_DEBUG "comedi%d: %s: io 0x%lx", dev->minor,
-               dev->driver->driver_name, iobase);
-        if (irq) {
-                printk(KERN_CONT ", irq %u", irq);
-                if (dma0) {
-                        printk(KERN_CONT ", dma %u", dma0);
-                        if (dma1)
-                                printk(KERN_CONT " and %u", dma1);
-                }
-        }
-        printk(KERN_CONT "\n");
-
-        if (iobase == 0) {
-                dev_err(dev->class_dev, "io base address required\n");
-                return -EINVAL;
-        }
-
-        /* check if io addresses are available */
-        if (!request_region(iobase, DAS1800_SIZE, dev->driver->driver_name)) {
-                printk
-                    (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
-                     iobase, iobase + DAS1800_SIZE - 1);
-                return -EIO;
-        }
-        dev->iobase = iobase;
+        retval = comedi_request_region(dev, it->options[0], DAS1800_SIZE);
+        if (retval)
+                return retval;
 
         board = das1800_probe(dev);
         if (board < 0) {
@@ -1562,12 +1539,14 @@ static int das1800_attach(struct comedi_device *dev,
 
         /*  if it is an 'ao' board with fancy analog out then we need extra io ports */
         if (thisboard->ao_ability == 2) {
-                iobase2 = iobase + IOBASE2;
-                if (!request_region(iobase2, DAS1800_SIZE,
-                                    dev->driver->driver_name)) {
-                        printk
-                            (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
-                             iobase2, iobase2 + DAS1800_SIZE - 1);
+                iobase2 = dev->iobase + IOBASE2;
+                if (!request_region(iobase2, DAS1800_SIZE, dev->board_name)) {
+                        release_region(dev->iobase, DAS1800_SIZE);
+                        dev_warn(dev->class_dev,
+                                 "%s: I/O port conflict (%#lx,%d)\n",
+                                 dev->board_name,
+                                 iobase2, DAS1800_SIZE);
+                        dev->iobase = 0;
                         return -EIO;
                 }
                 devpriv->iobase2 = iobase2;