The unmunged data should be saved for readback not the munged data.
Signed-off-by: H Hartley Sweeten <[email protected]>
Cc: Ian Abbott <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
---
drivers/staging/comedi/drivers/ii_pci20kc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ii_pci20kc.c
b/drivers/staging/comedi/drivers/ii_pci20kc.c
index 687db43..10e8073 100644
--- a/drivers/staging/comedi/drivers/ii_pci20kc.c
+++ b/drivers/staging/comedi/drivers/ii_pci20kc.c
@@ -165,12 +165,14 @@ static int ii20k_ao_insn_write(struct comedi_device *dev,
struct ii20k_ao_private *ao_spriv = s->private;
void __iomem *iobase = ii20k_module_iobase(dev, s);
unsigned int chan = CR_CHAN(insn->chanspec);
- unsigned int val = ao_spriv->last_data[chan];
+ unsigned int val;
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
+ ao_spriv->last_data[chan] = val;
+
/* munge data */
val += ((s->maxdata + 1) >> 1);
val &= s->maxdata;
@@ -180,8 +182,6 @@ static int ii20k_ao_insn_write(struct comedi_device *dev,
writeb(0x00, iobase + II20K_AO_STRB_REG(chan));
}
- ao_spriv->last_data[chan] = val;
-
return insn->n;
}
--
2.0.3
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