diff --git a/drivers/comedi/drivers/s526.c b/drivers/comedi/drivers/s526.c
index 9245c679a3c4..dd27c754dea4 100644
--- a/drivers/comedi/drivers/s526.c
+++ b/drivers/comedi/drivers/s526.c
@@ -553,7 +553,8 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	struct comedi_subdevice *s;
 	int ret;
 
-	ret = comedi_request_region(dev, it->options[0], 0x40);
+	ret = comedi_check_request_region(dev, it->options[0], 0x40,
+					  0, 0xffc0, 64);
 	if (ret)
 		return ret;