Use comedi_buf_write_samples() instead of cfc_write_to_buffer() to add all
the samples to the async buffer in one operation.
The core will add the COMEDI_CB_BLOCK event when data is written to the
async buffer. Remove the unnecessary event in the driver.
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/ni_labpc_isadma.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ni_labpc_isadma.c
b/drivers/staging/comedi/drivers/ni_labpc_isadma.c
index 967202e..6d38605 100644
--- a/drivers/staging/comedi/drivers/ni_labpc_isadma.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_isadma.c
@@ -91,7 +91,6 @@ void labpc_drain_dma(struct comedi_device *dev)
int status;
unsigned long flags;
unsigned int max_points, num_points, residue, leftover;
- int i;
status = devpriv->stat1;
@@ -122,9 +121,7 @@ void labpc_drain_dma(struct comedi_device *dev)
leftover = max_points;
}
- /* write data to comedi buffer */
- for (i = 0; i < num_points; i++)
- cfc_write_to_buffer(s, devpriv->dma_buffer[i]);
+ comedi_buf_write_samples(s, devpriv->dma_buffer, num_points);
if (cmd->stop_src == TRIG_COUNT)
devpriv->count -= num_points;
@@ -133,8 +130,6 @@ void labpc_drain_dma(struct comedi_device *dev)
set_dma_addr(devpriv->dma_chan, devpriv->dma_addr);
set_dma_count(devpriv->dma_chan, leftover * sample_size);
release_dma_lock(flags);
-
- async->events |= COMEDI_CB_BLOCK;
}
EXPORT_SYMBOL_GPL(labpc_drain_dma);
--
2.0.3
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