On Tue, 20 Oct 2015, Rob Herring wrote: > > The probe ordering is not the entire picture, though. > > > > Even if you get the probe ordering right, the problem is going to show up in > > multiple other places: system suspend/resume, runtime PM, system shutdown, > > unbinding of drivers. In all of those cases it is necessary to handle things > > in a specific order if there is a dependency. > > My understanding was with deferred probe that it also solves suspend > ordering problems because things are suspended in reverse order of > probing. Devices are suspended in reverse order of _registration_. Not of probing. 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(). 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
