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

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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>
This commit is contained in:
Ian Abbott 2026-01-30 16:47:28 +00:00 committed by Greg Kroah-Hartman
parent cb51837eee
commit a02b67b23e
1 changed files with 2 additions and 1 deletions
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3
drivers/comedi/drivers/adq12b.c
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@ -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;