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Each if branch in handle_external_interrupt_irqoff() is mutually exclusive. Add 'else' to make it clear and also avoid some unnecessary check. Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>