Use the subdevice (*cancel) operation to remove the need for a forward
declaration.

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/pcl812.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/comedi/drivers/pcl812.c 
b/drivers/staging/comedi/drivers/pcl812.c
index 0d7d3ae..d0708f8 100644
--- a/drivers/staging/comedi/drivers/pcl812.c
+++ b/drivers/staging/comedi/drivers/pcl812.c
@@ -536,8 +536,6 @@ struct pcl812_private {
 static void setup_range_channel(struct comedi_device *dev,
                                struct comedi_subdevice *s,
                                unsigned int rangechan, char wait);
-static int pcl812_ai_cancel(struct comedi_device *dev,
-                           struct comedi_subdevice *s);
 
 static void pcl812_start_pacer(struct comedi_device *dev, bool load_timers)
 {
@@ -911,7 +909,7 @@ static irqreturn_t interrupt_pcl812_ai_int(int irq, void *d)
 
        if (err) {
                dev_dbg(dev->class_dev, "A/D cmd IRQ without DRDY!\n");
-               pcl812_ai_cancel(dev, s);
+               s->cancel(dev, s);
                s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
                comedi_event(dev, s);
                return IRQ_HANDLED;
@@ -935,7 +933,7 @@ static irqreturn_t interrupt_pcl812_ai_int(int irq, void *d)
                if (!(devpriv->ai_neverending))
                                                        /* all data sampled */
                        if (devpriv->ai_act_scan >= cmd->stop_arg) {
-                               pcl812_ai_cancel(dev, s);
+                               s->cancel(dev, s);
                                s->async->events |= COMEDI_CB_EOA;
                        }
        }
@@ -968,7 +966,7 @@ static void transfer_from_dma_buf(struct comedi_device *dev,
                        if (!devpriv->ai_neverending)
                                                        /* all data sampled */
                                if (devpriv->ai_act_scan >= cmd->stop_arg) {
-                                       pcl812_ai_cancel(dev, s);
+                                       s->cancel(dev, s);
                                        s->async->events |= COMEDI_CB_EOA;
                                        break;
                                }
-- 
1.8.5.2

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