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staging: comedi: remove this_board macro in the pcmad 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>
This commit is contained in:
H Hartley Sweeten 2012-05-22 17:39:22 -07:00 committed by Greg Kroah-Hartman
parent 2fbffee060
commit 449b683c6b
1 changed files with 5 additions and 5 deletions
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10
drivers/staging/comedi/drivers/pcmad.c
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@ -58,8 +58,6 @@ struct pcmad_board_struct {
int n_ai_bits;
};
#define this_board ((const struct pcmad_board_struct *)(dev->board_ptr))
struct pcmad_priv_struct {
int differential;
int twos_comp;
@ -72,6 +70,7 @@ static int pcmad_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
const struct pcmad_board_struct *board = comedi_board(dev);
int i;
int chan;
int n;
@ -89,7 +88,7 @@ static int pcmad_ai_insn_read(struct comedi_device *dev,
data[n] |= (inb(dev->iobase + PCMAD_MSB) << 8);
if (devpriv->twos_comp)
data[n] ^= (1 << (this_board->n_ai_bits - 1));
data[n] ^= (1 << (board->n_ai_bits - 1));
}
return n;
@ -104,6 +103,7 @@ static int pcmad_ai_insn_read(struct comedi_device *dev,
*/
static int pcmad_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
const struct pcmad_board_struct *board = comedi_board(dev);
int ret;
struct comedi_subdevice *s;
unsigned long iobase;
@ -125,7 +125,7 @@ static int pcmad_attach(struct comedi_device *dev, struct comedi_devconfig *it)
if (ret < 0)
return ret;
dev->board_name = this_board->name;
dev->board_name = board->name;
s = dev->subdevices + 0;
s->type = COMEDI_SUBD_AI;
@ -133,7 +133,7 @@ static int pcmad_attach(struct comedi_device *dev, struct comedi_devconfig *it)
s->n_chan = 16; /* XXX */
s->len_chanlist = 1;
s->insn_read = pcmad_ai_insn_read;
s->maxdata = (1 << this_board->n_ai_bits) - 1;
s->maxdata = (1 << board->n_ai_bits) - 1;
s->range_table = &range_unknown;
return 0;