asyintr
ret = ddi_intr_add_handler(asy->asy_inth[i], asyintr,
static uint_t asyintr(caddr_t, caddr_t);
static uint_t asyintr(caddr_t argasy);
if (ddi_add_intr(devi, 0, &(asy->asy_iblock), 0, asyintr,