On Thursday 28 October 2004 13:43, Pavel Machek wrote: > Hi! > > > > Unfreeze during resume: reinitialize the hardware, then enable queues. > > > > Don't always re-init; S4 may have had it preserve key state. > > Like how the device requested the wakeup from S4, or the state > > of downstream links. > > Ok, so the driver *needs* to know if state was preserved over the > suspend or not... To know if it should do full re-init or if parts of > re-init can be skipped. That's where more detailed message during > device_resume() would be nice. Currently that state comes in two parts: - Hardware ... look at registers, see if "reset" path is right - Software ... maybe registers aren't sufficient for this hw If software state was needed, it had to have been set up earlier before that system sleep transition. I still don't see a need for more resume() state. - Dave
