IP27_HUB_PEND0_IRQ
enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
irq_set_percpu_devid(IP27_HUB_PEND0_IRQ);
irq_set_chained_handler_and_data(IP27_HUB_PEND0_IRQ, ip27_do_irq_mask0,