On Friday, April 03, 2015 01:44:36 PM Dmitry Torokhov wrote: > Hi Tomeu, > > On Fri, Apr 03, 2015 at 02:57:56PM +0200, Tomeu Vizoso wrote: > > Have dev_pm_ops.prepare return 1 for USB devices, interfaces, endpoints > > and ports so that USB devices can remain runtime-suspended when the > > system goes to a sleep state, if their wakeup state is correct. > > > > Also enable runtime PM for endpoints, which is another requirement for > > the above to work. > > After patching I think the 4th unrelated subsystem with stubs for > prepare() I think it is pretty clear that this approach is not the right > one. > > If your driver does not care about any children hanging off it there is > dev->ignore_children flag that either already does what you want, or > maybe needs adjusted to support your use case. I wouldn't overload ignore_children with that meaning. That said adding a "return 1 from device_prepare() if this is set" flag might be a good idea. -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
