44. Bus Error Checker

How do you plan to solve it?

module error_checker_xz (
    input [7:0] bus,
    output reg all_known,
    output reg has_unknown,
    output reg [7:0] bus_if_known
);

always @(*) begin

    all_known = 1'b0;
    has_unknown = 1'b0;
    bus_if_known = 8'h00;

    if (^bus === 1'bX) begin

        has_unknown = 1'b1;
        bus_if_known = 8'h00;
    end
    else begin
        all_known = 1'b1;
        bus_if_known = bus;
    end
end

endmodule