staging: comedi: remove this_board macro in the poc driver

The 'this_board' macro depends on having a local variable with
a magic name. The CodingStyle document suggests not doing this
to avoid confusion. Remove the macro and use the comedi_board()
inline helper to get the dev->board_ptr information.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/poc.c b/drivers/staging/comedi/drivers/poc.c
index e712048..95e348f 100644 (file)
--- a/drivers/staging/comedi/drivers/poc.c
+++ b/drivers/staging/comedi/drivers/poc.c
@@ -57,8 +57,6 @@ struct boarddef_struct {
        const struct comedi_lrange *range;
 };
 
-#define this_board ((const struct boarddef_struct *)dev->board_ptr)
-
 static int readback_insn(struct comedi_device *dev, struct comedi_subdevice *s,
                         struct comedi_insn *insn, unsigned int *data)
 {
@@ -137,22 +135,23 @@ static int pcl734_insn_bits(struct comedi_device *dev,
 
 static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
+       const struct boarddef_struct *board = comedi_board(dev);
        struct comedi_subdevice *s;
        unsigned long iobase;
        unsigned int iosize;
 
        iobase = it->options[0];
        printk(KERN_INFO "comedi%d: poc: using %s iobase 0x%lx\n", dev->minor,
-              this_board->name, iobase);
+              board->name, iobase);
 
-       dev->board_name = this_board->name;
+       dev->board_name = board->name;
 
        if (iobase == 0) {
                printk(KERN_ERR "io base address required\n");
                return -EINVAL;
        }
 
-       iosize = this_board->iosize;
+       iosize = board->iosize;
        /* check if io addresses are available */
        if (!request_region(iobase, iosize, "dac02")) {
                printk(KERN_ERR "I/O port conflict: failed to allocate ports "
@@ -163,18 +162,18 @@ static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 
        if (alloc_subdevices(dev, 1) < 0)
                return -ENOMEM;
-       if (alloc_private(dev, sizeof(unsigned int) * this_board->n_chan) < 0)
+       if (alloc_private(dev, sizeof(unsigned int) * board->n_chan) < 0)
                return -ENOMEM;
 
        /* analog output subdevice */
        s = dev->subdevices + 0;
-       s->type = this_board->type;
-       s->n_chan = this_board->n_chan;
-       s->maxdata = (1 << this_board->n_bits) - 1;
-       s->range_table = this_board->range;
-       s->insn_write = this_board->winsn;
-       s->insn_read = this_board->rinsn;
-       s->insn_bits = this_board->insnbits;
+       s->type = board->type;
+       s->n_chan = board->n_chan;
+       s->maxdata = (1 << board->n_bits) - 1;
+       s->range_table = board->range;
+       s->insn_write = board->winsn;
+       s->insn_read = board->rinsn;
+       s->insn_bits = board->insnbits;
        if (s->type == COMEDI_SUBD_AO || s->type == COMEDI_SUBD_DO)
                s->subdev_flags = SDF_WRITABLE;
 
@@ -183,8 +182,10 @@ static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 
 static void poc_detach(struct comedi_device *dev)
 {
+       const struct boarddef_struct *board = comedi_board(dev);
+
        if (dev->iobase)
-               release_region(dev->iobase, this_board->iosize);
+               release_region(dev->iobase, board->iosize);
 }
 
 static const struct boarddef_struct boards[] = {