staging: comedi: ni_65xx: 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_65xx.c b/drivers/staging/comedi/drivers/ni_65xx.c
index bce39f1ea36d9aa473c5d712433c5ca19456e1ce..f4c4233417eba2cbe906d2144a1df9e74aa2ee6d 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_65xx.c
+++ b/drivers/staging/comedi/drivers/ni_65xx.c
@@ -478,7 +478,7 @@ static int ni_65xx_dio_insn_bits(struct comedi_device *dev,
 static irqreturn_t ni_65xx_interrupt(int irq, void *d)
 {
        struct comedi_device *dev = d;
-       struct comedi_subdevice *s = dev->subdevices + 2;
+       struct comedi_subdevice *s = &dev->subdevices[2];
        unsigned int status;
 
        status = readb(private(dev)->mite->daq_io_addr + Change_Status);
@@ -678,7 +678,7 @@ static int ni_65xx_attach(struct comedi_device *dev,
        if (ret)
                return ret;
 
-       s = dev->subdevices + 0;
+       s = &dev->subdevices[0];
        if (board(dev)->num_di_ports) {
                s->type = COMEDI_SUBD_DI;
                s->subdev_flags = SDF_READABLE;
@@ -696,7 +696,7 @@ static int ni_65xx_attach(struct comedi_device *dev,
                s->type = COMEDI_SUBD_UNUSED;
        }
 
-       s = dev->subdevices + 1;
+       s = &dev->subdevices[1];
        if (board(dev)->num_do_ports) {
                s->type = COMEDI_SUBD_DO;
                s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
@@ -713,7 +713,7 @@ static int ni_65xx_attach(struct comedi_device *dev,
                s->type = COMEDI_SUBD_UNUSED;
        }
 
-       s = dev->subdevices + 2;
+       s = &dev->subdevices[2];
        if (board(dev)->num_dio_ports) {
                s->type = COMEDI_SUBD_DIO;
                s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
@@ -737,7 +737,7 @@ static int ni_65xx_attach(struct comedi_device *dev,
                s->type = COMEDI_SUBD_UNUSED;
        }
 
-       s = dev->subdevices + 3;
+       s = &dev->subdevices[3];
        dev->read_subdev = s;
        s->type = COMEDI_SUBD_DI;
        s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
@@ -791,10 +791,13 @@ static void ni_65xx_detach(struct comedi_device *dev)
        if (dev->irq)
                free_irq(dev->irq, dev);
        if (private(dev)) {
+               struct comedi_subdevice *s;
                unsigned i;
+
                for (i = 0; i < dev->n_subdevices; ++i) {
-                       kfree(dev->subdevices[i].private);
-                       dev->subdevices[i].private = NULL;
+                       s = &dev->subdevices[i];
+                       kfree(s->private);
+                       s->private = NULL;
                }
                if (private(dev)->mite)
                        mite_unsetup(private(dev)->mite);