44. Bus Error Checker

How do you plan to solve it?

/*Write your code here*/
module error_checker_xz(bus,all_known,has_unknown,bus_if_known);
input [7:0]bus;
output reg all_known,has_unknown;
output reg [7:0]bus_if_known;
always@(bus)begin
if(^bus | ^bus==0)begin
    all_known=1;
    has_unknown=0;
    bus_if_known=bus;
end
else begin
    all_known=0;
    has_unknown=1;
    bus_if_known=0;
end
end
endmodule