comedi: adq12b: Add sanity checks for I/O base address

The "adq12b" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of the ADQ12-B
board.  It currently allows any base address to be configured but the
hardware only supports the following base addresses (set by an on-board
jumper): 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0.

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>
Link: https://patch.msgid.link/20260130170416.49994-4-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/comedi/drivers/adq12b.c b/drivers/comedi/drivers/adq12b.c
index 19d76518200669088d9767e2a33d138cedf7887a..f8fa5c6ecdff1f4e2a3158760c20694942509994 100644 (file)
--- a/drivers/comedi/drivers/adq12b.c
+++ b/drivers/comedi/drivers/adq12b.c
@@ -179,7 +179,8 @@ static int adq12b_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        struct comedi_subdevice *s;
        int ret;
 
-       ret = comedi_request_region(dev, it->options[0], 0x10);
+       ret = comedi_check_request_region(dev, it->options[0], 0x10,
+                                         0x300, 0x3af, 0x20);
        if (ret)
                return ret;