On Sun, 20 Jun 2010, David Brownell wrote: > --- On Sun, 6/20/10, Oliver Neukum <oliver@xxxxxxxxxx> wrote: > > > wrote: > > > > > > > > > Am Donnerstag, 17. Juni 2010 05:41:24 > > schrieb > > > > David Brownell: > > > > > Not recently, except in the loose sense that > > > if there's going to be such batching code > > > for NCM, it ought to be reusable. > > > > OK, so we need to discuss > > > > 1) do we want batching > > To support NCM, EEM, and RNDIS we do. > > but recall my point was that this is just > a way to work around USB stacks that have > weak support for transfer queues ... Not just the software stacks -- the hardware as well. EHCI and OHCI specifically require transfer buffers to be "virtually contiguous", i.e., contiguous except at page boundaries. 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
