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

The "ni_labpc" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a
Lab-PC-1200 series or Lab-PC+ board. It currently allows any base
address to be configured but the hardware only supports base addresses
(configured by a configuration utility and stored in nonvolatile memory)
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/20260130170416.49994-32-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

authored by

Ian Abbott and committed by
Greg Kroah-Hartman 2555cab1 df05bcfc

+2 -1
+2 -1
drivers/comedi/drivers/ni_labpc.c
··· 78 78 unsigned int dma_chan = it->options[2]; 79 79 int ret; 80 80 81 - ret = comedi_request_region(dev, it->options[0], 0x20); 81 + ret = comedi_check_request_region(dev, it->options[0], 0x20, 82 + 0, 0x3ff, 32); 82 83 if (ret) 83 84 return ret; 84 85