staging: comedi: ni_pcidio: remove subdevice pointer math

Convert the comedi_subdevice access from pointer math to array
access.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ni_pcidio.c b/drivers/staging/comedi/drivers/ni_pcidio.c
index 0a55de968039ca9eba6b9b12dc4b5f2693e2fef5..a83f52517567a2d486264eed62ac7cfaf08410ff 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_pcidio.c
+++ b/drivers/staging/comedi/drivers/ni_pcidio.c
@@ -480,7 +480,7 @@ static int ni_pcidio_poll(struct comedi_device *dev, struct comedi_subdevice *s)
 static irqreturn_t nidio_interrupt(int irq, void *d)
 {
        struct comedi_device *dev = d;
-       struct comedi_subdevice *s = dev->subdevices;
+       struct comedi_subdevice *s = &dev->subdevices[0];
        struct comedi_async *async = s->async;
        struct mite_struct *mite = devpriv->mite;
 
@@ -1252,8 +1252,8 @@ static int nidio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 
        if (!this_board->is_diodaq) {
                for (i = 0; i < this_board->n_8255; i++) {
-                       subdev_8255_init(dev, dev->subdevices + i,
-                                        nidio96_8255_cb,
+                       s = &dev->subdevices[i];
+                       subdev_8255_init(dev, s, nidio96_8255_cb,
                                         (unsigned long)(devpriv->mite->
                                                         daq_io_addr +
                                                         NIDIO_8255_BASE(i)));
@@ -1263,7 +1263,7 @@ static int nidio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                printk(KERN_INFO " rev=%d",
                       readb(devpriv->mite->daq_io_addr + Chip_Version));
 
-               s = dev->subdevices + 0;
+               s = &dev->subdevices[0];
 
                dev->read_subdev = s;
                s->type = COMEDI_SUBD_DIO;
@@ -1307,11 +1307,14 @@ static int nidio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 
 static void nidio_detach(struct comedi_device *dev)
 {
+       struct comedi_subdevice *s;
        int i;
 
        if (this_board && !this_board->is_diodaq) {
-               for (i = 0; i < this_board->n_8255; i++)
-                       subdev_8255_cleanup(dev, dev->subdevices + i);
+               for (i = 0; i < this_board->n_8255; i++) {
+                       s = &dev->subdevices[i];
+                       subdev_8255_cleanup(dev, s);
+               }
        }
        if (dev->irq)
                free_irq(dev->irq, dev);