staging: comedi: comedi_fops: cleanup comedi_{read, write}_subdevice()

Flip the info->device tests so than the return NULL occurs last.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_fops.c

@@ -118,19 +118,19 @@ comedi_read_subdevice(const struct comedi_file_info *info)
 {
 	if (info->read_subdevice)
 		return info->read_subdevice;
-	if (info->device == NULL)
-		return NULL;
-	return info->device->read_subdev;
+	if (info->device)
+		return info->device->read_subdev;
+	return NULL;
 }
 
 static struct comedi_subdevice *
 comedi_write_subdevice(const struct comedi_file_info *info)
 {
 	if (info->write_subdevice)
 		return info->write_subdevice;
-	if (info->device == NULL)
-		return NULL;
-	return info->device->write_subdev;
+	if (info->device)
+		return info->device->write_subdev;
+	return NULL;
 }
 
 static int resize_async_buffer(struct comedi_device *dev,