staging: comedi: ni_labpc_isadma: use comedi_cmd pointer

Use a local variable to access the comedi_cmd as a pointer instead
of getting to from the comedi_async pointer.

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/ni_labpc_isadma.c b/drivers/staging/comedi/drivers/ni_labpc_isadma.c
index 2149596..d9f25fd 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_labpc_isadma.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_isadma.c
@@ -87,6 +87,7 @@ void labpc_drain_dma(struct comedi_device *dev)
        struct labpc_private *devpriv = dev->private;
        struct comedi_subdevice *s = dev->read_subdev;
        struct comedi_async *async = s->async;
+       struct comedi_cmd *cmd = &async->cmd;
        int status;
        unsigned long flags;
        unsigned int max_points, num_points, residue, leftover;
@@ -108,12 +109,12 @@ void labpc_drain_dma(struct comedi_device *dev)
         */
        residue = get_dma_residue(devpriv->dma_chan) / sample_size;
        num_points = max_points - residue;
-       if (devpriv->count < num_points && async->cmd.stop_src == TRIG_COUNT)
+       if (cmd->stop_src == TRIG_COUNT && devpriv->count < num_points)
                num_points = devpriv->count;
 
        /* figure out how many points will be stored next time */
        leftover = 0;
-       if (async->cmd.stop_src != TRIG_COUNT) {
+       if (cmd->stop_src != TRIG_COUNT) {
                leftover = devpriv->dma_transfer_size / sample_size;
        } else if (devpriv->count > num_points) {
                leftover = devpriv->count - num_points;
@@ -125,7 +126,7 @@ void labpc_drain_dma(struct comedi_device *dev)
        for (i = 0; i < num_points; i++)
                cfc_write_to_buffer(s, devpriv->dma_buffer[i]);
 
-       if (async->cmd.stop_src == TRIG_COUNT)
+       if (cmd->stop_src == TRIG_COUNT)
                devpriv->count -= num_points;
 
        /* set address and count for next transfer */