44. Bus Error Checker

How do you plan to solve it?

// Code your design here
/*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
);
reg y;
always@(*)begin
    y=(^bus);
    if (y === 1'b0 || y === 1'b1)begin
    all_known=1;
    has_unknown=0;
    bus_if_known =bus;

    end
    else begin
        all_known=0;
        has_unknown=1;
        bus_if_known=8'h00;
    end
end
endmodule