CAN_SFF_MASK
cfi[0].can_mask = CAN_SFF_MASK | CAN_EFF_FLAG;
cfi[1].can_mask = CAN_SFF_MASK | CAN_EFF_FLAG;
cfi[0].can_mask = CAN_SFF_MASK | CAN_EFF_FLAG;
cfi[1].can_mask = CAN_SFF_MASK;
cfi[0].can_mask == (CAN_SFF_MASK | CAN_EFF_FLAG),
cfi[1].can_mask == CAN_SFF_MASK,
cfi.can_mask = CAN_SFF_MASK | CAN_EFF_FLAG;