staging: comedi: pcl816: use comedi_buf_write_samples()

For aesthetics, use comedi_buf_write_samples() to add the sample to the
async buffer.

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>

drivers/staging/comedi/drivers/pcl816.c

@@ -289,8 +289,6 @@ static bool pcl816_ai_next_chan(struct comedi_device *dev,
 	struct pcl816_private *devpriv = dev->private;
 	struct comedi_cmd *cmd = &s->async->cmd;
 
-	s->async->events |= COMEDI_CB_BLOCK;
-
 	s->async->cur_chan++;
 	if (s->async->cur_chan >= cmd->chanlist_len) {
 		s->async->cur_chan = 0;
@@ -313,10 +311,12 @@ static void transfer_from_dma_buf(struct comedi_device *dev,
 				  unsigned short *ptr,
 				  unsigned int bufptr, unsigned int len)
 {
+	unsigned short val;
 	int i;
 
 	for (i = 0; i < len; i++) {
-		comedi_buf_put(s, ptr[bufptr++]);
+		val = ptr[bufptr++];
+		comedi_buf_write_samples(s, &val, 1);
 
 		if (!pcl816_ai_next_chan(dev, s))
 			return;