bcm4377_ring_state
offsetof(struct bcm4377_ring_state, xfer_ring_head));
offsetof(struct bcm4377_ring_state, xfer_ring_tail));
offsetof(struct bcm4377_ring_state, completion_ring_head));
offsetof(struct bcm4377_ring_state, completion_ring_tail));
struct bcm4377_ring_state *ring_state;