diff --git a/drivers/comedi/drivers/das6402.c b/drivers/comedi/drivers/das6402.c
index 7660487e563c..516a5d5a2840 100644
--- a/drivers/comedi/drivers/das6402.c
+++ b/drivers/comedi/drivers/das6402.c
@@ -560,7 +560,8 @@ static int das6402_attach(struct comedi_device *dev,
 	if (!devpriv)
 		return -ENOMEM;
 
-	ret = comedi_request_region(dev, it->options[0], 0x10);
+	ret = comedi_check_request_region(dev, it->options[0], 0x10,
+					  0, 0x3ff, 16);
 	if (ret)
 		return ret;