Messages in this thread | | | Subject | Re: Totally broken PCI PM calls | From | Benjamin Herrenschmidt <> | Date | Mon, 11 Oct 2004 20:54:26 +1000 |
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On Mon, 2004-10-11 at 20:18, Pavel Machek wrote: > Hi! > > > > Maybe the real problem is that we are trying to use the device suspend > > > functions for suspend-to-disk, when we don't really want to change the > > > device's power state at all. > > > > An acceptable solution is certainly to instead of passing down "go to D3", > > just not do anything at all. HOWEVER, I doubt that is actually all that > > good a solution either: devices quite possibly do want to save state > > and/or set wake-on-events. > > And DMA needs to be stopped, or it is "bye bye data" situation.
This is true for pretty much any PM state
> Does sparse now have typechecking on enums? Solution that was in -mm > was basically "put enums there so drivers can't be confused" + "signal > global state out-of-band in global variable". It was not too nice, but > it certainly was working. > Pavel -- Benjamin Herrenschmidt <benh@kernel.crashing.org>
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