Am Mittwoch, 10. Juni 2009 23:31:13 schrieb Rafael J. Wysocki: > > > +/** > > > + * pm_check_children - Check if all children of a device have been > > > suspended. + * @dev: Device to check. > > > + * > > > + * Returns 0 if all children of the device have been suspended or > > > -EBUSY + * otherwise. > > > + */ > > > > We might want to do a runtime suspend even if the device's children > > aren't already suspended. For example, you could suspend a link while > > leaving the device on the other end of the link at full power -- > > especially if powering down the device is slow but changing the link's > > power level is fast. > > Well, this means that the dependencies between devices in the device tree > are pretty much useless for the run-time PM as far as the core is > concerned. In which case, why did you mention them at all? Some bussystems need this constraint others don't or only for some nodes. We need a way to communicate this to the core. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
