On Tue, 14 Mar 2023 13:11:58 +0100 Niklas Schnelle wrote:

In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. We thus need to add HAS_IOPORT as dependency for
those drivers requiring them. For the DEFXX driver there use of I/O
ports is optional and we only need to fence those paths.can It also
turns out that with HAS_IOPORT handled explicitly HAMRADIO does not need
the !S390 dependency and successfully builds the bpqether driver.

Acked-by: Jakub Kicinski <kuba@kernel.org>