On Fri, 6 Oct 2006, Christopher "Monty" Montgomery wrote: > On 10/6/06, Alan Stern <[EMAIL PROTECTED]> wrote: > > > Why do you say that? In principle it's possible to report loss of sync > > quite easily. uhci-hcd reports it by setting > > urb->iso_frame_desc[n].status to -EXDEV. It won't release the bandwidth > > reservation when this happens. I don't see any reason why ehci-hcd > > shouldn't behave the same way. > > Is that returned immediately upon next submission...? Or do you have > to wait until the next URB completes to see the -EXDEV? Obviously, it > can't be reported by the URB preceeding the missed slots.
If by "next URB" you mean the one that was submitted too late, then -EXDEV is returned when the next URB completes. It's difficult or impossible to return it any earlier, because of races with the hardware. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
