I have one device that uses the JSM561U chip and performance is problematic. (HD DOCKING STATION VINIK, 2 BAIAS, 2.5/3.5, USB 3.0). In fact, it is barely functional under linux (Fedora 31 Kernel 5.5.17-200.fc31.x86_64) and also Ubuntu 19.10 (will test later under raspbian). It works to some extend: ...