On Fri, Jul 2, 2021 at 9:37 PM Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > But I thought I'd report this as a likely candidate. Confirmed. The watchdog hang bisects right down to commit 9ce650a75a3b ("ALSA: usb-audio: Reduce latency at playback start"). And reverting it on top of my tree also fixes the hang, so it's not some bisection fluke. I have no idea what is actually wrong with that commit, but it most definitely is the problem, and I have reverted it in my tree so that I can continue merging stuff tomorrow. Linus