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staging: comedi: pcl724: tidy up subdev_8255_init() calls 

subdev_8255_init() can fail, make sure to check for it and return
the errno.

The private function subdev_8255_cb() is identical to the default
io callback used by the 8255 driver. Remove it and pass NULL to
subdev_8255_init() so the default callback will be used.

The private function subdev_8255mapped_cb() is used for the memory
memory mapped io of the pet48dio board. Rename this function so
it has namespace associated with the driver.

Casting the iobase passed to subdev_8255_init() is not needed.
Use a local variable for the iobase and remove the casts.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-06-10 10:15:55 -07:00 committed by Greg Kroah-Hartman
parent 0a0c2cb96b
commit 84f7db9d8f
1 changed files with 11 additions and 20 deletions
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31
drivers/staging/comedi/drivers/pcl724.c
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@ -94,19 +94,7 @@ static const struct pcl724_board boardtypes[] = {
},
};
static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
{
unsigned long iobase = arg;
if (dir) {
outb(data, iobase + port);
return 0;
} else {
return inb(iobase + port);
}
}
static int subdev_8255mapped_cb(int dir, int port, int data,
static int pcl724_8255mapped_io(int dir, int port, int data,
unsigned long iobase)
{
int movport = SIZE_8255 * (iobase >> 12);
@ -127,6 +115,7 @@ static int pcl724_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
const struct pcl724_board *board = comedi_board(dev);
struct comedi_subdevice *s;
unsigned long iobase;
unsigned int iorange;
int ret, i, n_subdevices;
@ -150,13 +139,15 @@ static int pcl724_attach(struct comedi_device *dev, struct comedi_devconfig *it)
for (i = 0; i < dev->n_subdevices; i++) {
s = &dev->subdevices[i];
if (board->is_pet48) {
subdev_8255_init(dev, s, subdev_8255mapped_cb,
(unsigned long)(dev->iobase +
i * 0x1000));
} else
subdev_8255_init(dev, s, subdev_8255_cb,
(unsigned long)(dev->iobase +
SIZE_8255 * i));
iobase = dev->iobase + (i * 0x1000);
ret = subdev_8255_init(dev, s, pcl724_8255mapped_io,
iobase);
} else {
iobase = dev->iobase + (i * SIZE_8255);
ret = subdev_8255_init(dev, s, NULL, iobase);
}
if (ret)
return ret;
}
return 0;