staging: comedi: das16: 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 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>

1 files changed, 14 insertions, 25 deletions

diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c
index c84f7795994e..01fe078f3914 100644
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -1079,13 +1079,11 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
         struct comedi_subdevice *s;
         int ret;
         unsigned int irq;
-        unsigned long iobase;
         unsigned int dma_chan;
         int timer_mode;
         unsigned long flags;
         struct comedi_krange *user_ai_range, *user_ao_range;
 
-        iobase = it->options[0];
 #if 0
         irq = it->options[1];
         timer_mode = it->options[8];
@@ -1097,8 +1095,6 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
         if (timer_mode)
                 irq = 0;
 
-        printk(KERN_INFO "comedi%d: das16:", dev->minor);
-
         /*  check that clock setting is valid */
         if (it->options[3]) {
                 if (it->options[3] != 0 &&
@@ -1116,33 +1112,26 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
         dev->private = devpriv;
 
         if (board->size < 0x400) {
-                printk(" 0x%04lx-0x%04lx\n", iobase, iobase + board->size);
-                if (!request_region(iobase, board->size, dev->board_name)) {
-                        printk(KERN_ERR " I/O port conflict\n");
-                        return -EIO;
-                }
+                ret = comedi_request_region(dev, it->options[0], board->size);
+                if (ret)
+                        return ret;
         } else {
-                printk(KERN_INFO " 0x%04lx-0x%04lx 0x%04lx-0x%04lx\n",
-                       iobase, iobase + 0x0f,
-                       iobase + 0x400,
-                       iobase + 0x400 + (board->size & 0x3ff));
-                if (!request_region(iobase, 0x10, dev->board_name)) {
-                        printk(KERN_ERR " I/O port conflict:  0x%04lx-0x%04lx\n",
-                               iobase, iobase + 0x0f);
-                        return -EIO;
-                }
-                if (!request_region(iobase + 0x400, board->size & 0x3ff,
+                ret = comedi_request_region(dev, it->options[0], 0x10);
+                if (ret)
+                        return ret;
+                /* Request an additional region for the 8255 */
+                if (!request_region(dev->iobase + 0x400, board->size & 0x3ff,
                                     dev->board_name)) {
-                        release_region(iobase, 0x10);
-                        printk(KERN_ERR " I/O port conflict:  0x%04lx-0x%04lx\n",
-                               iobase + 0x400,
-                               iobase + 0x400 + (board->size & 0x3ff));
+                        release_region(dev->iobase, 0x10);
+                        dev_warn(dev->class_dev,
+                                 "%s: I/O port conflict (%#lx,%d)\n",
+                                 dev->board_name,
+                                 dev->iobase + 0x400, board->size & 0x3ff);
+                        dev->iobase = 0;
                         return -EIO;
                 }
         }
 
-        dev->iobase = iobase;
-
         /*  probe id bits to make sure they are consistent */
         if (das16_probe(dev, it)) {
                 printk(KERN_ERR " id bits do not match selected board, aborting\n");