tree 342b82fbb14f85580a6d7a835d33738ba12ddbfd
parent f068d320def7fd83bf0fcdca37b305f1c2ac5413
author Cornelia Huck <cornelia.huck@de.ibm.com> 1401279357 +0200
committer Cornelia Huck <cornelia.huck@de.ibm.com> 1402386626 +0200

s390x/kvm: make flic play well with old kernels

If we run with an old kernel that does not support KVM_CAP_IRQ_ROUTING,
we don't have to do anything in the ->register_io_adapter and
->io_adapter_map callbacks and therefore should return 0 instead of
-ENOSYS (just as the non-kvm flic does).

This fixes using adapter interrupts when running under an older kernel,
which broke with "s390x: add I/O adapter registration".

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>