staging: comedi: cb_pcidas: fix dac08_write_insn()

As pointed out by Ian Abbott, the comedi INSN_WRITE instructions
are meant to iterate over, and write, all the data[] passed from
the comedi core. Modify dac08_write_insn() to work as intended.

Since doc08_write_insn() now returns the proper response to the
core, make the dac08_write() helper return void.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reported-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/cb_pcidas.c

@@ -659,7 +659,7 @@ static int caldac_read_insn(struct comedi_device *dev,
 }
 
 /* 1602/16 pregain offset */
-static int dac08_write(struct comedi_device *dev, unsigned int value)
+static void dac08_write(struct comedi_device *dev, unsigned int value)
 {
 	struct cb_pcidas_private *devpriv = dev->private;
 	unsigned long cal_reg;
@@ -680,14 +680,18 @@ static int dac08_write(struct comedi_device *dev, unsigned int value)
 		outw(value, cal_reg);
 		udelay(1);
 	}
-	return 1;	/* insn->n */
 }
 
 static int dac08_write_insn(struct comedi_device *dev,
 			    struct comedi_subdevice *s,
 			    struct comedi_insn *insn, unsigned int *data)
 {
-	return dac08_write(dev, data[0]);
+	int i;
+
+	for (i = 0; i < insn->n; i++)
+		dac08_write(dev, data[i]);
+
+	return insn->n;
 }
 
 static int dac08_read_insn(struct comedi_device *dev,