diff --git a/drivers/staging/comedi/drivers/amplc_dio200.c b/drivers/staging/comedi/drivers/amplc_dio200.c
index 6a87652e7e2a..8eb67651486a 100644
--- a/drivers/staging/comedi/drivers/amplc_dio200.c
+++ b/drivers/staging/comedi/drivers/amplc_dio200.c
@@ -661,7 +661,7 @@ dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
 	subpriv = s->private;
 
 	spin_lock_irqsave(&subpriv->spinlock, flags);
-	s->async->inttrig = 0;
+	s->async->inttrig = NULL;
 	if (subpriv->active)
 		event = dio200_start_intr(dev, s);
 
@@ -1364,7 +1364,7 @@ static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 			break;
 		case sd_8255:
 			/* digital i/o subdevice (8255) */
-			ret = subdev_8255_init(dev, s, 0,
+			ret = subdev_8255_init(dev, s, NULL,
 					       iobase + layout->sdinfo[n]);
 			if (ret < 0)
 				return ret;