comedi: 8255_pci: Conditionally remove devices that use port I/O

In a future patch, the port I/O functions (`inb()`, `outb()`, and
friends will only be declared in the `HAS_IOPORT` configuration option
is enabled.

The 8255_pci module supports PCI digital I/O devices from various
manufacturers that consist of one or more 8255 Programmable Peripheral
Interface chips (or equivalent hardware) to provide their digital I/O
ports.  Some of the devices use port I/O and some only use memory-mapped
I/O.

Conditionally compile in support for the devices that need port I/O if
and only if the `CONFIG_HAS_IOPORT` macro is defined.  Change
`pci_8255_auto_attach()` to return an error if the device actually
requires port I/O (based on the PCI BAR resource flags) but the
`HAS_IOPORT` configuration is not enabled.

Cc: Arnd Bergmann <[email protected]>
Cc: Niklas Schnelle <[email protected]>
Signed-off-by: Ian Abbott <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

0 files changed, 0 insertions, 0 deletions