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comedi: aio_iiro_16: Add sanity checks for I/O base address

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The "aio_iiro_16" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a supported
board (IIRO-16).  It currently allows any base address to be configured
but the hardware only supports base addresses (set by on-board jumpers)
in the range 0x100 to 0x3F8 on 8-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>
Link: https://patch.msgid.link/20260130170416.49994-6-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott
2026-01-30 16:47:30 +00:00
committed by Greg Kroah-Hartman
parent 254ae67d39
commit 81c2e0c8b7
1 changed files with 2 additions and 1 deletions
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3
drivers/comedi/drivers/aio_iiro_16.c
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@@ -167,7 +167,8 @@ static int aio_iiro_16_attach(struct comedi_device *dev,
struct comedi_subdevice *s;
int ret;
ret = comedi_request_region(dev, it->options[0], 0x8);
ret = comedi_check_request_region(dev, it->options[0], 0x8,
0x100, 0x3ff, 0x8);
if (ret)
return ret;