Am Samstag, 3. Februar 2007 23:02 schrieb Alan Stern:
> That's not a problem as far as the hardware is concerned. But both
> threads call hub_port_status(), which reads the status into a dedicated
> buffer at hub->status->port. Even though the URBs are serialized, on
> non-cache-coherent architectures we could have problems with one thread
> accessing the buffer while the other thread is doing DMA on it.
And this kills the other obvious solution of preallocating one buffer per
port. The more I think about it, the simpler serialization appears.
Regards
Oliver
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