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comedi: ni_at_a2150: Add sanity checks for I/O base address

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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>
Link: https://patch.msgid.link/20260130170416.49994-28-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott
2026-01-30 16:47:52 +00:00
committed by Greg Kroah-Hartman
parent 66563dd6e3
commit 3389e476ec
1 changed files with 2 additions and 1 deletions
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3
drivers/comedi/drivers/ni_at_a2150.c
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@@ -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;