On Fri, Aug 29, 2025 at 08:13:07PM +0000, Thinh Nguyen wrote: > ..shouldn't the PM core know that A was runtime suspended to not skip > ->resume? (sorry I'm not an expert in the PM core, genuine question > here). This doesn't answer your question directly, but I would like to add some background. There are subsystems/drivers that do want to resume their devices during system resume, even if the devices were in runtime suspend originally. At a minimum, the PM core doesn't want to take this choice away from them. In fact, the USB subsystem was designed to run that way back when support for runtime PM was first added, and it hasn't been changed since -- although maybe it should be. There are explicit mechanisms for telling the PM core that a device should be skipped during system resume; we could use them. Regardless, I don't recall any discussions of the particular situation in this thread ever taking place. Alan Stern
