On Wed, 2 Apr 2008, Oliver Neukum wrote: > Am Mittwoch, 2. April 2008 17:13:11 schrieb Alan Stern: > > Basically yes. Subsystems and drivers are allowed to keep devices > > suspended if they were suspended before the system went to sleep. > > Remember, the purpose of the resume method is to let drivers know that > > the system is now awake, not to force them to put their devices into a > > high-power state. > > Well, sometimes it is exactly that what we desire, eg. as a side effect > of lsusb. Should the callbacks have different semantics depending on > the reason you call them? And how should that information be transferred? Which callbacks are you referring to? When lsusb opens a device and does an autoresume, it does not call the same routine as the PM core does when resuming from a system sleep. lsusb ends up calling usb_autoresume_device() whereas the PM core ends up calling usb_resume(), which is the function you quoted earlier. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
