Use the comedi_range_is_bipolar() helper instead of checking the
'range' index against a magic number.
Also, use the s->maxdata to calculate the value needed to munge the
value for bipolar data instead of the magic number.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfondation.org>
---
drivers/staging/comedi/drivers/usbdux.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/comedi/drivers/usbdux.c
b/drivers/staging/comedi/drivers/usbdux.c
index 1edfd33..8726fdb 100644
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -363,14 +363,15 @@ static void usbduxsub_ai_isoc_irq(struct urb *urb)
/* get the data from the USB bus and hand it over to comedi */
n = s->async->cmd.chanlist_len;
for (i = 0; i < n; i++) {
+ unsigned int range = CR_RANGE(s->async->cmd.chanlist[i]);
+ int16_t val = le16_to_cpu(devpriv->in_buffer[i]);
+
+ /* bipolar data is two's-complement */
+ if (comedi_range_is_bipolar(s, range))
+ val ^= ((s->maxdata + 1) >> 1);
+
/* transfer data */
- if (CR_RANGE(s->async->cmd.chanlist[i]) <= 1) {
- err = comedi_buf_put(s->async,
- le16_to_cpu(devpriv->in_buffer[i]) ^ 0x800);
- } else {
- err = comedi_buf_put(s->async,
- le16_to_cpu(devpriv->in_buffer[i]));
- }
+ err = comedi_buf_put(s->async, val);
if (unlikely(err == 0)) {
/* buffer overflow */
usbdux_ai_stop(dev, 0);
--
1.8.3.2
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