On Mon, 12 Apr 2010, Andi Kleen wrote: > > Well, the sound driver itself doesn't care for any of those things, just > > like any other USB driver doesn't. The USB core itself of the host > > controller driver should do, and as far as I can see, it does that, yes. > > Hmm, still things must go wrong somewhere. Perhaps need some instrumentation > to see if all the transfer buffers really hit the PCI mapping functions. Such a test has already been carried out earlier in this thread: http://marc.info/?l=linux-usb&m=127074587029353&w=2 http://marc.info/?l=linux-usb&m=127076841801051&w=2 http://marc.info/?l=linux-usb&m=127082890510415&w=2 > It might be interesting to test if the device works with enabled > IOMMU. That would trigger any failures to properly map the buffers > earlier. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
