amdk8_scan_chains() questions

[Liu Tao]

Hello,

    In AMD's <<BIOS and Kernel developer's Guide>> 3.3.16 LDTi Bus Number
Registers section it says that if the link contains the HT IO hub the 
secondary
bus number must be programmed to 0. But amdk8_scan_chains() is called with
max=0, so it won't write the secondary register of  any link to 0? Or some
other code handles this case?

Regards,
Liu Tao