diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index bb98f82141a1..e0f3915b0f63 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -292,7 +292,7 @@ static inline struct comedi_subdevice *comedi_get_write_subdevice(
 	return info->device->write_subdev;
 }
 
-int comedi_alloc_subdevices(struct comedi_device *, unsigned int);
+int comedi_alloc_subdevices(struct comedi_device *, int);
 
 void comedi_device_detach(struct comedi_device *dev);
 int comedi_device_attach(struct comedi_device *dev,
diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index 541364782b5f..979aa0e88997 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -56,10 +56,9 @@ static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s);
 
 struct comedi_driver *comedi_drivers;
 
-int comedi_alloc_subdevices(struct comedi_device *dev,
-			    unsigned int num_subdevices)
+int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices)
 {
-	unsigned i;
+	int i;
 
 	dev->n_subdevices = num_subdevices;
 	dev->subdevices =