44. Bus Error Checker

How do you plan to solve it?

/*Write your code here*/
module error_checker_xz(
    input [7:0] bus, 
    output all_known, 
    output has_unknown, 
    output [7:0] bus_if_known
);

assign all_known = (^bus !== 1'bx);
assign has_unknown = ~(all_known);
assign bus_if_known=(all_known)? bus:8'h00;
endmodule