The "ni_atmio16d" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of an
AT-MIO-16 o AT-MIO-16D board.  It currently allows any base address to
be configured but the hardware only supports base addresses (configured
by on-board DIP switches) in the range 0 to 0x3E0 on 32-byte boundaries.

Add a sanity check to ensure the device is not configured at an
unsupported base address.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
---
 drivers/comedi/drivers/ni_atmio16d.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/comedi/drivers/ni_atmio16d.c b/drivers/comedi/drivers/ni_atmio16d.c
index e5e7cc423c87..cefa39b5077c 100644
--- a/drivers/comedi/drivers/ni_atmio16d.c
+++ b/drivers/comedi/drivers/ni_atmio16d.c
@@ -574,7 +574,8 @@ static int atmio16d_attach(struct comedi_device *dev,
 	struct comedi_subdevice *s;
 	int ret;
 
-	ret = comedi_request_region(dev, it->options[0], 0x20);
+	ret = comedi_check_request_region(dev, it->options[0], 0x20,
+					  0, 0x3ff, 32);
 	if (ret)
 		return ret;
 
-- 
2.51.0