On Wed, Feb 23, 2022 at 07:40:31AM +0000, Tao Wang (Consultant) (QUIC) wrote: > Ok, thanks your reply. > > Here is my question, we must modify the driver "onboard_usb_hub.c" if we want to use it. But it's hard to complete because it's an opensource code. I do not understand. We do not deal with code that is not in the kernel source tree, as we have no idea what is out there. Please just submit your changes to be merged into the tree and all will be fine. thanks, greg k-h