staging: comedi: pcl816: fix DMA 'bytes' calculation

The calculation for the total number of bytes in the DMA transfer
is incorrect. Fix it.

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>

diff --git a/drivers/staging/comedi/drivers/pcl816.c b/drivers/staging/comedi/drivers/pcl816.c
index 3742f5f..9c1b963 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl816.c
+++ b/drivers/staging/comedi/drivers/pcl816.c
@@ -164,9 +164,7 @@ static void pcl816_ai_setup_dma(struct comedi_device *dev,
        bytes = devpriv->hwdmasize;
        if (cmd->stop_src == TRIG_COUNT) {
                /*  how many */
-               bytes = s->async->cmd.chanlist_len *
-               s->async->cmd.chanlist_len *
-               sizeof(short);
+               bytes = cmd->stop_arg * cmd->chanlist_len * sizeof(short);
 
                /*  how many DMA pages we must fill */
                devpriv->dma_runs_to_end = bytes / devpriv->hwdmasize;