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staging: comedi: ni_labpc_isadma: use comedi_buf_write_samples() 

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 <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-10-22 15:36:31 -07:00 committed by Greg Kroah-Hartman
parent 8d185f52dc
commit b9357cba10
1 changed files with 1 additions and 6 deletions
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7
drivers/staging/comedi/drivers/ni_labpc_isadma.c
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@ -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);