Use comedi_buf_read_samples() to read the analog output samples from
the async buffer. That function will set the COMEDI_CB_BLOCK event
when samples are read from the async buffer.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/usbdux.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/staging/comedi/drivers/usbdux.c
b/drivers/staging/comedi/drivers/usbdux.c
index eae441f..53f1e21 100644
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -413,7 +413,7 @@ static void usbduxsub_ao_handle_urb(struct comedi_device
*dev,
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
unsigned short val;
- if (!comedi_buf_get(s, &val)) {
+ if (!comedi_buf_read_samples(s, &val, 1)) {
dev_err(dev->class_dev, "buffer underflow\n");
async->events |= COMEDI_CB_OVERFLOW;
return;
@@ -425,7 +425,6 @@ static void usbduxsub_ao_handle_urb(struct comedi_device
*dev,
*datap++ = chan << 6;
s->readback[chan] = val;
}
- async->events |= COMEDI_CB_BLOCK;
}
/* if command is still running, resubmit urb for BULK transfer */
--
2.0.3
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