On Thu, 13 Oct 2011, Paul Zimmerman wrote: > Alan Stern <stern@...> writes: > > > > > On Wed, 12 Oct 2011, Markus Rechberger wrote: > > > > > > But it's > > > > important to keep in mind that the device is completely unaware of the > > > > transfer size. > > If this is a mass-storage protocol, then that is not true. The device receives > the transfer size in the CBW packet. You're using the term "transfer size" in a different way. The value in the CBW packet is the amount of data expected to be transferred to/from the device, whereas the "transfer size" I have been referring to is the value of urb->transfer_buffer_length. They don't have to be the same because the data can be spread over several URBs. > But I know you are well aware of that Alan, so I guess this is not mass- > storage you are talking about. No, it's a webcam. 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
