On Sun, 2003-03-09 at 20:31, Johannes Erdfelt wrote:
> On Sun, Mar 09, 2003, Jouni Ryno <[EMAIL PROTECTED]> wrote:
> > I'm developing driver for EZUSB-based system. When I use continuous
> > iso-transfer (several urbs connected in the ring), every 986 (sometimes
> > +-3) I get 1 or more urbs, which complete in reverse order.
> >
> > For example, start_frames in completion routine show up like
> > 20, 21, 23, 22, 24. The next error would be like 6, 7, 9, 8, 10 ...
> > Sometimes even 0, 1, 6, 5, 4, 3, 2, 7, 8 ...
> >
> > No missing data, just reverse order.
> >
> > This is with 2.4.20, UHCI (uhci.o) in Dell Inspiron.
> >
> > Is this a known phenomena, my misunderstanding of something or a bug ...
>
> Well, it's probably it just an artifact from this code:
>
> list_add(&urbp->complete_list, &uhci->complete_list);
>
Thank you, that makes a difference. And usb-uhci also works (without
modifications)
Could not find a reason for having interrupts disabled, turning of the
APM did not make any difference. Oh well, anyway it works now. And I
have check in my driver for this kind of errors, which is important !
best regards
Jouni
--
Jouni Ryn� mailto://[EMAIL PROTECTED]/
http://www.geo.fmi.fi/~ryno/
Finnish Meteorological Institute http://www.fmi.fi/
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"It's just zeros and ones, it cannot be hard"
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