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SubjectRe: [linux-usb-devel] Re: OHCI problems with suspend/resume

> I suspect that USB should do some non-global PM stuff too.
> Hub ports can be suspended when the devices connected to them
> are idle for long enough ... that's not something I'd expect
> system-wide PM policies to address.

Indeed, this is not addressed, though it may sense to have
a way in the device model to call the suspend/resume callbacks
of "childs" of a given hub only for that purpose, I don't think
this is implemented yet. Maybe talk to Patrick about it.

In general "local" power management (automatic disk spin down,
chipset idle-pm, etc...) is ... local to the driver, though you
can probably use the power state field of struct device to
store your current state if it maps to those semantics.


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