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staging: comedi: rti800: save unmunged data for ao readback

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The unmunged data should be saved for readback not the munged data.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-08-25 16:04:38 -07:00 • committed by Greg Kroah-Hartman
parent c2dfc3a5a2
commit 6dc125d2be
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/comedi/drivers/rti800.c
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@ -231,11 +231,13 @@ static int rti800_ao_insn_write(struct comedi_device *dev,
unsigned int chan = CR_CHAN(insn->chanspec);
int reg_lo = chan ? RTI800_DAC1LO : RTI800_DAC0LO;
int reg_hi = chan ? RTI800_DAC1HI : RTI800_DAC0HI;
int val = devpriv->ao_readback[chan];
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
unsigned int val = data[i];
devpriv->ao_readback[chan] = val;
if (devpriv->dac_2comp[chan])
val ^= 0x800;
@ -243,8 +245,6 @@ static int rti800_ao_insn_write(struct comedi_device *dev,
outb((val >> 8) & 0xff, dev->iobase + reg_hi);
}
devpriv->ao_readback[chan] = val;
return insn->n;
}