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The "pcmda12" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a PCM-D/A-12 or PCM-A/D-16 board. It currently allows any base address to be configured. I cannot find a full manual, but the short datasheet says it uses 15 consecutive I/O addresses on "any even sixteen port boundary", so assume it 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/20260130170416.49994-42-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>