RE: suspend/resume support for driver requires an external firmware

[Zhu, Yi]

Patrick Mochel wrote:
> We talked about this in Ottawa a few months ago, and I think
> this is the right approach. Note though, that I think it
> needs to be more complete:
> 
> - There needs to be restore_state() to be symmetic.
> - There needs to be the proper failure recovery
>   If save_state() or suspend() fails, every device that has had their
>   state saved needs to be restored.
> - It needs to be called for all power management requests.

Agreed.

> - The PCI implementation should call pci_save_state() in it,
> instead of in ->suspend().

Also agree. And split pci_restore_state() from ->resume to
->restore_state. But all current drivers need to be rewritten.

Thanks,
-yi
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