For the time being the 5.8 kernel has issues with Renesas USB controllers due to a FW version check issue. My PCIe x4 USB 3.0 controller card is affected by it. I need that controller working, as I currently have a USB HDD enclosure attached to it, that I need to use. It’s currently being discussed here and the latest solution is to remove that check entirely because it turned out there are so many FW versions in the wild (FW version 8209 in my case). I’m currently trying to build a 5.8 kernel ...