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staging: comedi: rti800: tidy up rti800_do_insn_bits()

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To clarify the function a bit, add local variables for the 'mask'
and 'bits', passed by the comedi core, used to update the digital
outputs.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
2013-04-08 18:18:26 -07:00
committed by Greg Kroah-Hartman
parent 97f67708e6
commit bd838bea6a
1 changed files with 9 additions and 4 deletions
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13
drivers/staging/comedi/drivers/rti800.c
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@@ -265,11 +265,16 @@ static int rti800_di_insn_bits(struct comedi_device *dev,
static int rti800_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
struct comedi_insn *insn,
unsigned int *data)
{
if (data[0]) {
s->state &= ~data[0];
s->state |= data[0] & data[1];
unsigned int mask = data[0];
unsigned int bits = data[1];
if (mask) {
s->state &= ~mask;
s->state |= (bits & mask);
/* Outputs are inverted... */
outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
}