Hi Greg, We have found an IP bug recently, it will cause the audio device stop working at the HUB downstream face port, and the commit can reduce the possibilities for failures, needs to improve RTL code to fix it totally. Peter Chen (1): usb: chipidea: udc: workaround for endpoint conflict issue drivers/usb/chipidea/udc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) -- 2.14.1