Re: [linux-usb-devel] Re: hotplugging to deal with firmware download

[Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>]

Am Mittwoch, 5. Juni 2002 16:54 schrieb David Brownell:
> >>>OK, but where do we handle the case where resumption is impossible
> >>>because the device has been unplugged ?
> >>
> >>If that's not already handled, it'd be a bug in the hub driver.
> >
> > Well, how will we handle it with respect to the resume function ?
> > Do we report failure if there's no longer a device at the physical
> > location ? IMHO we do.
>
> Report it to what?  And in what sense would it ever be an "error"
> to remove a device -- even during suspend?

The genric layer that did request the resumption must be told
that this was impossible and the device should be purged.

> > Now I am puzzeled. There must be some misunderstanding.
> > Could you please outline, how we deal with a resumption
> > if the devices lost power under the new scheme ?
>
> By definition, this is "(re)enumeration", not resumption.

But how is the state restored ?

	Regards
		Oliver

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