On Thu, 6 Jan 2011, Greg Kroah-Hartman wrote: > From: Pete Zaitcev <zaitcev@xxxxxxxxxx> > > Usually the usbmon returns the amount of data specified in > urb->transfer_buffer_length for output submissions and urb->actual_length > for input callbacks. However, for Isochronous input transfers, this is > not enough, since the returned data buffer may contain "holes". > > One easy way to fix this is to use urb->transfer_buffer_length, > but this often transfers a whole lot of unused data, so we find > how much was actually used instead. This is the patch I mentioned yesterday. It changes an established kernel/userspace ABI, so I recommend that it be reverted and replaced by the patch posted in http://marc.info/?l=linux-usb&m=129424577426130&w=2 In effect, don't worry about transferring a whole lot of unused data, since that's what userspace has learned to expect. Just do it. 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
