> This effectively kills the system. We came here via: > corsair_void_raw_event (hid_driver::raw_event) > -> corsair_void_process_receiver > -> scoped_guard(mutex, &drvdata->battery_mutex) > And hid_driver::raw_event can be called from the interrupt context. This > happened at: Damn it, I was suspicious that it was too easy. It's been running for a year without an issue on my system, I'll clearly have to read a bit more. I'm not sure what the best solution is for this. 'corsair_void_process_receiver()' shouldn't be called frequently, and the locks shouldn't be waiting on each other very often, so I suppose swapping the mutex for a spinlock is probably the best option, instead of increasing code complexity? Happy to put a patch in for whatever seems best :) Thanks, Stuart