staging: comedi: 8255_pci: tidy up pci_8255_mmio()

The 8255 driver (*io) callback now includes the comedi_device pointer.
Using this we can get the ioremap'ed base address.

Instead of passing the (cast) mmio address to subdev_8255_init(), pass
the 'iobase' of the 8255 registers (i * 4).

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>

diff --git a/drivers/staging/comedi/drivers/8255_pci.c b/drivers/staging/comedi/drivers/8255_pci.c
index cee3d18..1a3deec 100644 (file)
--- a/drivers/staging/comedi/drivers/8255_pci.c
+++ b/drivers/staging/comedi/drivers/8255_pci.c
@@ -193,13 +193,11 @@ static int pci_8255_mite_init(struct pci_dev *pcidev)
 static int pci_8255_mmio(struct comedi_device *dev,
                         int dir, int port, int data, unsigned long iobase)
 {
-       void __iomem *mmio_base = (void __iomem *)iobase;
-
        if (dir) {
-               writeb(data, mmio_base + port);
+               writeb(data, dev->mmio + iobase + port);
                return 0;
        }
-       return readb(mmio_base  + port);
+       return readb(dev->mmio + iobase  + port);
 }
 
 static int pci_8255_auto_attach(struct comedi_device *dev,
@@ -253,8 +251,7 @@ static int pci_8255_auto_attach(struct comedi_device *dev,
 
                s = &dev->subdevices[i];
                if (is_mmio) {
-                       iobase = (unsigned long)(dev->mmio + (i * 4));
-                       ret = subdev_8255_init(dev, s, pci_8255_mmio, iobase);
+                       ret = subdev_8255_init(dev, s, pci_8255_mmio, i * 4);
                } else {
                        iobase = dev->iobase + (i * 4);
                        ret = subdev_8255_init(dev, s, NULL, iobase);