Hi Mike, Thanks for the report. I'm sorry I missed this in review - obviously we can't call something that acquires the mutex from rfkill_set_sw_state() which clearly states, in the documentation: * This function can be called in any context, even from within rfkill * callbacks. I've reverted the change (and the follow-up fix) now. Michał, if you want to resubmit with this fixed, please also make sure you don't reintroduce the unused label warning and have the appropriate #ifdef that Arnd had later added for your change. Thanks, johannes