BNA_DOORBELL_IB_INT_ACK
((_i_dbell)->doorbell_ack = BNA_DOORBELL_IB_INT_ACK((_cls_timer), 0))
(writel(BNA_DOORBELL_IB_INT_ACK(0, (_events)), \
ib->door_bell.doorbell_ack = BNA_DOORBELL_IB_INT_ACK(