staging: comedi: adv_pci1710: fix analog output readback value

[pandora-kernel.git] / drivers / staging / comedi / drivers / adv_pci1710.c

diff --git a/drivers/staging/comedi/drivers/adv_pci1710.c b/drivers/staging/comedi/drivers/adv_pci1710.c
index da2b75b..672538e 100644 (file)
--- a/drivers/staging/comedi/drivers/adv_pci1710.c
+++ b/drivers/staging/comedi/drivers/adv_pci1710.c
@@ -414,6 +414,7 @@ static int pci171x_insn_write_ao(struct comedi_device *dev,
                                 struct comedi_subdevice *s,
                                 struct comedi_insn *insn, unsigned int *data)
 {
+       unsigned int val;
        int n, chan, range, ofs;
 
        chan = CR_CHAN(insn->chanspec);
@@ -429,11 +430,14 @@ static int pci171x_insn_write_ao(struct comedi_device *dev,
                outw(devpriv->da_ranges, dev->iobase + PCI171x_DAREF);
                ofs = PCI171x_DA1;
        }
+       val = devpriv->ao_data[chan];
 
-       for (n = 0; n < insn->n; n++)
-               outw(data[n], dev->iobase + ofs);
+       for (n = 0; n < insn->n; n++) {
+               val = data[n];
+               outw(val, dev->iobase + ofs);
+       }
 
-       devpriv->ao_data[chan] = data[n];
+       devpriv->ao_data[chan] = val;
 
        return n;
 
@@ -582,6 +586,7 @@ static int pci1720_insn_write_ao(struct comedi_device *dev,
                                 struct comedi_subdevice *s,
                                 struct comedi_insn *insn, unsigned int *data)
 {
+       unsigned int val;
        int n, rangereg, chan;
 
        chan = CR_CHAN(insn->chanspec);
@@ -591,13 +596,15 @@ static int pci1720_insn_write_ao(struct comedi_device *dev,
                outb(rangereg, dev->iobase + PCI1720_RANGE);
                devpriv->da_ranges = rangereg;
        }
+       val = devpriv->ao_data[chan];
 
        for (n = 0; n < insn->n; n++) {
-               outw(data[n], dev->iobase + PCI1720_DA0 + (chan << 1));
+               val = data[n];
+               outw(val, dev->iobase + PCI1720_DA0 + (chan << 1));
                outb(0, dev->iobase + PCI1720_SYNCOUT); /*  update outputs */
        }
 
-       devpriv->ao_data[chan] = data[n];
+       devpriv->ao_data[chan] = val;
 
        return n;
 }