44. Bus Error Checker

How do you plan to solve it?

/*Write your code here*/
module error_checker_xz(
    input  [7:0] bus,
    output reg all_known,
    output reg has_unknown,
    output reg [7:0] bus_if_known
);
integer i;
always @(*) begin 
    all_known=1'b1;
    has_unknown=1'b0;
    for(i=0;i<8;i=i+1) begin 
        if(bus[i]===1'bx || bus[i]===1'bz) begin 
            all_known=1'b0;
            has_unknown=1'b1;
        end
    end

    if(all_known) begin 
        bus_if_known=bus;
    end
    else begin 
        bus_if_known=8'b00;
    end
    
end
endmodule