fw_drv1
dev->si_drv1 = kmalloc(sizeof(struct fw_drv1), M_FW, M_WAITOK | M_ZERO);
struct fw_drv1 *d;
d = (struct fw_drv1 *)dev->si_drv1;
ir = ((struct fw_drv1 *)dev->si_drv1)->ir;
it = ((struct fw_drv1 *)dev->si_drv1)->it;
struct fw_drv1 *d;
d = (struct fw_drv1 *)dev->si_drv1;
ir = ((struct fw_drv1 *)dev->si_drv1)->ir;