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SubjectRe: PCI PM & compatibility

> - When a device is suspended, the pm_users count of its pm_parent is
> decremented, and incremented when the device is resumed.
> - device_suspend() makes multiple passes over the device list, in case
> power dependencies cause some devices to be deferred. It fails with an
> error (and resumes all suspended devices) if a pass was made in which
> no devicse were suspended, but there are still devices with a positive
> pm_users count.

How do you intend to deal with the childs of the device that has
pm_users non null ?

If you don't suspend it, you must also postpone all of it's childs.
That makes the list walking slightly more tricky, or you finally go
to a real tree structure ? (Which you may have to do to implement
the set_parent() thing too, no ?


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