Re: [RFC] PCI: Runtime power management

On Saturday 15 August 2009, Matthew Garrett wrote:

On Sat, Aug 15, 2009 at 11:21:53PM +0200, Rafael J. Wysocki wrote:

quoted

I can even imagine a scenario where this setting might be useful, like when
we don't want a network adapter to be woken up from the outside.

I think in that case we'd probably just want the interface to be downed? 
Some of this is going to require device-specific policy, I think - for 
the network case we probably want something in between IF_RUNNING and 
IF_DOWN (IF_CARRIER, perhaps) that indicates that we want the PHY to be 
powered. Pushing this out to sysfs would mean we'd have a consistent 
interface but varying semantics, and I'm not convinced that's an 
especially helpful interface.

I'm not disagreeing with that.

At this point I'd like to know the Alan's opinion.  I would gladly use the
'runtime_forbidden' flag only, but if we overlook something now, it's going
to be difficult to fix later.

Thanks,
Rafael