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18706ea68f
When FF-A initialisation is driven from a platform device probe, systems that do not implement FF-A can return -EOPNOTSUPP from the early transport or version discovery paths. Driver core treats that as a matched probe failure and prints: | arm-ffa arm-ffa: probe with driver arm-ffa failed with error -95 That is noisy for a firmware interface that can be absent on otherwise valid systems. Driver core already treats -ENODEV and -ENXIO as quiet rejected matches, so translate only the early unsupported discovery cases to -ENODEV. Keep later setup failures unchanged so real FF-A initialisation problems are still reported as probe failures. Reported-by: Nathan Chancellor <nathan@kernel.org> Closes: https://lore.kernel.org/all/20260523001148.GA1319283@ax162 Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com> Tested-by: Nathan Chancellor <nathan@kernel.org> Link: https://patch.msgid.link/20260526103649.5684-1-sudeep.holla@kernel.org Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>