In das16_interrupt(), use COMEDI_CB_CANCEL_MASK to determine if the async
command is still running and the dma needs to be re-enabled. This will
cause the driver not re-enable the dma if the async buffer overflows
(COMEDI_CB_OVERFLOW), a hardware error occurs (COMEDI_CB_ERROR), or the
command completes (COMEDI_CB_EOA).
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/das16.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/das16.c
b/drivers/staging/comedi/drivers/das16.c
index 466d4ef..4608b01 100644
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -523,7 +523,7 @@ static void das16_interrupt(struct comedi_device *dev)
devpriv->adc_byte_count -= num_bytes;
/* re-enable dma */
- if ((async->events & COMEDI_CB_EOA) == 0) {
+ if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
struct comedi_isadma_desc *nxt_desc = &dma->desc[dma->cur_dma];
nxt_desc->size = nxt_desc->maxsize;
--
2.0.3
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