diff --git a/drivers/staging/comedi/drivers/8255.c b/drivers/staging/comedi/drivers/8255.c
index 5e0e8ff89366e7501eaef7152ba6d3a3abb29bb2..7b7768b62484c94d9d60ec0de1e3190a4e0d0ad2 100644
--- a/drivers/staging/comedi/drivers/8255.c
+++ b/drivers/staging/comedi/drivers/8255.c
@@ -98,8 +98,8 @@ I/O port base address can be found in the output of 'lspci -v'.
 #define CR_CW		0x80
 
 struct subdev_8255_private {
-	unsigned long cb_arg;
-	int (*cb_func) (int, int, int, unsigned long);
+	unsigned long iobase;
+	int (*io) (int, int, int, unsigned long);
 	int have_irq;
 };
 
@@ -109,8 +109,8 @@ void subdev_8255_interrupt(struct comedi_device *dev,
 	struct subdev_8255_private *spriv = s->private;
 	short d;
 
-	d = spriv->cb_func(0, _8255_DATA, 0, spriv->cb_arg);
-	d |= (spriv->cb_func(0, _8255_DATA + 1, 0, spriv->cb_arg) << 8);
+	d = spriv->io(0, _8255_DATA, 0, spriv->iobase);
+	d |= (spriv->io(0, _8255_DATA + 1, 0, spriv->iobase) << 8);
 
 	comedi_buf_put(s->async, d);
 	s->async->events |= COMEDI_CB_EOS;
@@ -142,19 +142,19 @@ static int subdev_8255_insn(struct comedi_device *dev,
 		s->state |= (data[0] & data[1]);
 
 		if (data[0] & 0xff)
-			spriv->cb_func(1, _8255_DATA, s->state & 0xff,
-				       spriv->cb_arg);
+			spriv->io(1, _8255_DATA, s->state & 0xff,
+				  spriv->iobase);
 		if (data[0] & 0xff00)
-			spriv->cb_func(1, _8255_DATA + 1,
-				       (s->state >> 8) & 0xff, spriv->cb_arg);
+			spriv->io(1, _8255_DATA + 1,
+				  (s->state >> 8) & 0xff, spriv->iobase);
 		if (data[0] & 0xff0000)
-			spriv->cb_func(1, _8255_DATA + 2,
-				       (s->state >> 16) & 0xff, spriv->cb_arg);
+			spriv->io(1, _8255_DATA + 2,
+				  (s->state >> 16) & 0xff, spriv->iobase);
 	}
 
-	data[1] = spriv->cb_func(0, _8255_DATA, 0, spriv->cb_arg);
-	data[1] |= (spriv->cb_func(0, _8255_DATA + 1, 0, spriv->cb_arg) << 8);
-	data[1] |= (spriv->cb_func(0, _8255_DATA + 2, 0, spriv->cb_arg) << 16);
+	data[1] = spriv->io(0, _8255_DATA, 0, spriv->iobase);
+	data[1] |= (spriv->io(0, _8255_DATA + 1, 0, spriv->iobase) << 8);
+	data[1] |= (spriv->io(0, _8255_DATA + 2, 0, spriv->iobase) << 16);
 
 	return 2;
 }
@@ -174,7 +174,7 @@ static void do_config(struct comedi_device *dev, struct comedi_subdevice *s)
 		config |= CR_C_LO_IO;
 	if (!(s->io_bits & 0xf00000))
 		config |= CR_C_HI_IO;
-	spriv->cb_func(1, _8255_CR, config, spriv->cb_arg);
+	spriv->io(1, _8255_CR, config, spriv->iobase);
 }
 
 static int subdev_8255_insn_config(struct comedi_device *dev,
@@ -323,11 +323,11 @@ int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s,
 		return -ENOMEM;
 	s->private = spriv;
 
-	spriv->cb_arg = arg;
+	spriv->iobase = arg;
 	if (cb == NULL)
-		spriv->cb_func = subdev_8255_cb;
+		spriv->io = subdev_8255_cb;
 	else
-		spriv->cb_func = cb;
+		spriv->io = cb;
 	s->insn_bits = subdev_8255_insn;
 	s->insn_config = subdev_8255_insn_config;
 
@@ -425,7 +425,7 @@ static void dev_8255_detach(struct comedi_device *dev)
 		s = dev->subdevices + i;
 		if (s->type != COMEDI_SUBD_UNUSED) {
 			spriv = s->private;
-			release_region(spriv->cb_arg, _8255_SIZE);
+			release_region(spriv->iobase, _8255_SIZE);
 		}
 		subdev_8255_cleanup(dev, s);
 	}