> > 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", Which is a non-issue unless you're trying to accept buffers in virtual memory. Which is by no means a requirement associated with sane support for URB transfer queues... If I queue two separate URBs each of which has a length of exactly N packets (no ZLP at end), then the HCD will send 2*N packets, with a likely small temporal gap after the Nth... So the recipient could view that as a single transfer of 2*N packets, and not care that it came from two separate transfer buffers... -- 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
