ppc/kvm: change kvmppc_get_htab_fd() to return -errno on error
When kvmppc_get_htab_fd() fails, its return value is propagated up to qemu_savevm_state_iterate() or to qemu_savevm_state_complete_precopy(). All savevm handlers expect to receive a negative errno on error. Let's patch kvmppc_get_htab_fd() accordingly. While here, let's change htab_load() in the spapr code to also propagate the error, since it doesn't make sense to abort() if we couldn't get the htab fd from KVM. Signed-off-by: NGreg Kurz <groug@kaod.org> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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