Am Freitag, 12. Dezember 2003 21:48 schrieb Alan Stern:
> On Fri, 12 Dec 2003, David Brownell wrote:
>
> > Alan Stern wrote:
> >
> > >>That would also reduce the length of time the address0_sem
> > >>is held,
> > >
> > >
> > > It would? How so?
> >
> > It would be dropped after the address is assigned (the bus
> > no longer has an "address zero") ... rather than waiting
> > until after the device was configured and all its interfaces
> > were probed. I think that's the issue Oliver alluded to in
> > his followup to your comment.
>
> I thought it did that already. Oh well...
Not so simple. Khubd goes down a list. If the first item on its list
is not your failed reset, a deadlock will occur.
After you have submitted the URB that really does the reset, you
are commited. You must either set a valid address or disable the port.
You can rely on nobody else to do that.
Regards
Oliver
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