On Tue, 12 Oct 2010, Mark Brown wrote: > On Tue, Oct 12, 2010 at 11:34:18AM -0400, Alan Stern wrote: > > > Of course, if the device is idle then it's natural to ask why it isn't > > already in low-power mode. Maybe it's waiting for an autosuspend > > timer to expire; anything else doesn't make much sense. > > This isn't *really* about saving power in the individual device; it's > more about stopping the device generating events that disrupt the rest > of the system. Suspending the device can be one way of doing that and > is useful if it can be done but is not really the immediate goal here. Runtime PM is _not_ a reliable way of preventing a device from generating events. It is meant for saving energy, nothing else. If that's what this is about, then the answer is simple: Don't use runtime PM to try to suppress events. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
