2006/3/26, Alan Stern <[EMAIL PROTECTED]>:
> On Sun, 26 Mar 2006, Franck Bui-Huu wrote:
>
> > I got 2 more questions, hope you don't mind.
> >
> > Can I assert that the ep0's request queue has always one request queued ?
>
> No, of course not. Most of the time there won't be any requests queued.
> On ep0, requests are queued only in response to Setup packets from the
> host.
>
sorry the question wasn't accurate, I would have asked: am I sure that
the driver will queue only one request in a response to a SETUP
packet ? that would mean the request queue for ep0 has no more than
one request at any time.
> > Is it safe when aborting all requests of an ep's queue to do
> >
> > while (queue is not empty) {
> > request = first request of the queue
> > remove_request_from_queue(request);
> > driver->complete(request, status = -ERROR);
> > }
> >
> > I mean, am I sure that the driver won't queue another request to the queue ?
>
> No, you can't be sure of that. But if the gadget driver does queue
> another request, it has to take the consequences. In these circumstances
> it's not defined whether the new request would also get aborted.
>
does that mean there is no safe way to nuke all requests which belong
to an ep's queue ?
thanks
--
Franck
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