The "ni_at_a2150" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of an AT-A2150
series board. It currently allows any base address to be configured but
the hardware only supports base addresses (configured by on-board
jumpers) 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_at_a2150.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/comedi/drivers/ni_at_a2150.c b/drivers/comedi/drivers/ni_at_a2150.c
index e4e5a0ebd195..44221c928e32 100644
--- a/drivers/comedi/drivers/ni_at_a2150.c
+++ b/drivers/comedi/drivers/ni_at_a2150.c
@@ -694,7 +694,8 @@ static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it)
if (!devpriv)
return -ENOMEM;
- ret = comedi_request_region(dev, it->options[0], 0x1c);
+ ret = comedi_check_request_region(dev, it->options[0], 0x1c,
+ 0, 0x3ff, 32);
if (ret)
return ret;
--
2.51.0