MLXSW_REG_MBCT_DATA_LEN
size_t data_size = MLXSW_REG_MBCT_DATA_LEN;
if (size_left <= MLXSW_REG_MBCT_DATA_LEN) {
MLXSW_ITEM_BUF(reg, mbct, data, 0x20, MLXSW_REG_MBCT_DATA_LEN);
if (WARN_ON(data_size > MLXSW_REG_MBCT_DATA_LEN))