Convert the comedi_subdevice access from pointer math to array
access.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_labpc.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c
index ab8b787..65d5dfc 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -628,7 +628,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
return ret;
/* analog input subdevice */
- s = dev->subdevices + 0;
+ s = &dev->subdevices[0];
dev->read_subdev = s;
s->type = COMEDI_SUBD_AI;
s->subdev_flags =
@@ -643,7 +643,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
s->cancel = labpc_cancel;
/* analog output */
- s = dev->subdevices + 1;
+ s = &dev->subdevices[1];
if (thisboard->has_ao) {
/*
* Could provide command support, except it only has a
@@ -670,7 +670,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
}
/* 8255 dio */
- s = dev->subdevices + 2;
+ s = &dev->subdevices[2];
/* if board uses io memory we have to give a custom callback
* function to the 8255 driver */
if (thisboard->memory_mapped_io)
@@ -680,7 +680,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
subdev_8255_init(dev, s, NULL, dev->iobase + DIO_BASE_REG);
/* calibration subdevices for boards that have one */
- s = dev->subdevices + 3;
+ s = &dev->subdevices[3];
if (thisboard->register_layout == labpc_1200_layout) {
s->type = COMEDI_SUBD_CALIB;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
@@ -695,7 +695,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
s->type = COMEDI_SUBD_UNUSED;
/* EEPROM */
- s = dev->subdevices + 4;
+ s = &dev->subdevices[4];
if (thisboard->register_layout == labpc_1200_layout) {
s->type = COMEDI_SUBD_MEMORY;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
@@ -809,8 +809,12 @@ static int labpc_find_device(struct comedi_device *dev, int bus, int slot)
void labpc_common_detach(struct comedi_device *dev)
{
- if (dev->subdevices)
- subdev_8255_cleanup(dev, dev->subdevices + 2);
+ struct comedi_subdevice *s;
+
+ if (dev->subdevices) {
+ s = &dev->subdevices[2];
+ subdev_8255_cleanup(dev, s);
+ }
#ifdef CONFIG_ISA_DMA_API
/* only free stuff if it has been allocated by _attach */
kfree(devpriv->dma_buffer);
--
1.7.11
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