staging: comedi: dt282x: 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/dt282x.c b/drivers/staging/comedi/drivers/dt282x.c
index 1f0b40e4bdddccd3d24a22ec7cbc097bca31612a..b7c43c84d949e981aa2e602225fde76fbf6d810c 100644 (file)
--- a/drivers/staging/comedi/drivers/dt282x.c
+++ b/drivers/staging/comedi/drivers/dt282x.c
@@ -312,7 +312,7 @@ static void dt282x_ao_dma_interrupt(struct comedi_device *dev)
        void *ptr;
        int size;
        int i;
-       struct comedi_subdevice *s = dev->subdevices + 1;
+       struct comedi_subdevice *s = &dev->subdevices[1];
 
        outw(devpriv->supcsr | DT2821_CLRDMADNE, dev->iobase + DT2821_SUPCSR);
 
@@ -345,7 +345,7 @@ static void dt282x_ai_dma_interrupt(struct comedi_device *dev)
        int size;
        int i;
        int ret;
-       struct comedi_subdevice *s = dev->subdevices;
+       struct comedi_subdevice *s = &dev->subdevices[0];
 
        outw(devpriv->supcsr | DT2821_CLRDMADNE, dev->iobase + DT2821_SUPCSR);
 
@@ -457,8 +457,8 @@ static irqreturn_t dt282x_interrupt(int irq, void *d)
                return IRQ_HANDLED;
        }
 
-       s = dev->subdevices + 0;
-       s_ao = dev->subdevices + 1;
+       s = &dev->subdevices[0];
+       s_ao = &dev->subdevices[1];
        adcsr = inw(dev->iobase + DT2821_ADCSR);
        dacsr = inw(dev->iobase + DT2821_DACSR);
        supcsr = inw(dev->iobase + DT2821_SUPCSR);
@@ -1275,7 +1275,7 @@ static int dt282x_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        if (ret)
                return ret;
 
-       s = dev->subdevices + 0;
+       s = &dev->subdevices[0];
 
        dev->read_subdev = s;
        /* ai subdevice */
@@ -1294,7 +1294,7 @@ static int dt282x_attach(struct comedi_device *dev, struct comedi_devconfig *it)
            opt_ai_range_lkup(boardtype.ispgl, it->options[opt_ai_range]);
        devpriv->ad_2scomp = it->options[opt_ai_twos];
 
-       s++;
+       s = &dev->subdevices[1];
 
        s->n_chan = boardtype.dachan;
        if (s->n_chan) {
@@ -1320,7 +1320,7 @@ static int dt282x_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                s->type = COMEDI_SUBD_UNUSED;
        }
 
-       s++;
+       s = &dev->subdevices[2];
        /* dio subsystem */
        s->type = COMEDI_SUBD_DIO;
        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;