On Tue, 20 Oct 2015, Mark Brown wrote: > On Tue, Oct 20, 2015 at 10:40:03AM -0400, Alan Stern wrote: > > > Furthermore, that applies only to devices that use synchronous suspend. > > Async suspend is becoming common, and there the only restrictions are > > parent-child relations plus whatever explicit requirements that drivers > > impose by calling device_pm_wait_for_dev(). > > Hrm, this is the first I'd noticed that feature though I see the initial > commit dates from January. Async suspend and device_pm_wait_for_dev() were added in January 2010, not 2015! > It looks like most of the users are PCs at > the minute but we should be using it more widely for embedded things, > there's definitely some cases I'm aware of where it will allow us to > remove some open coding. > > It does seem like we want to be feeding dependency information we > discover for probing way into the suspend dependencies... Rafael has been thinking about a way to do this systematically. Nothing concrete has emerged yet. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
