> This really makes no sense to me. There's a field, with
> an SMP-safe lock. The protocol between one layer and
> the next involves holding that lock before changing that
> field. And you're saying that's racey. How?
It seems to me that you are racing against HC hardware.
You cannot unlink an URB that is being executed, can you?
At the same time you must retain EINPROGRESS in the status
field until some time _after_ io is completed, because you
need to evaluate the result of the transfer.
IMHO the only way to learn whether an URB can be unlinked
is to try it.
Regards
Oliver
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