On Wed, Jun 01, 2011 at 04:09:42PM +0800, Xu, Andiry wrote: > > -----Original Message----- > > From: Sarah Sharp [mailto:sarah.a.sharp@xxxxxxxxxxxxxxx] > > Sent: Wednesday, June 01, 2011 5:17 AM > > To: Xu, Andiry > > Cc: linux-usb@xxxxxxxxxxxxxxx; He, Alex > > Subject: Re: [RFC 6/9] xHCI 1.0: Soft Retry mechanism > > > > Hi Andiry and Alex, > > > > I've noticed (although I don't have time to confirm again) that the > > NEC/Rensas host controller seems to return these transaction errors > > whenever there is a link TRB in the middle of the control transfer TD. > > Have you also noticed this? If so, we should probably let Rensas > know, > > as it might indicate a hardware bug. Or it could mean we're doing > > something odd in the xHCI driver. > > > > Hmm... I haven't noticed that yet. Will have a try. > In order to reproduce it, can we put a link TRB in the middle of a > transfer > ring? That would require a lot of rework of the ring handling code. It all assumes that there is only one link TRB per segment, at the end. You could try to reproduce it by running lsusb -v and fetching the descriptors. Or opening and closing minicom with a USB to serial adapter. Sarah Sharp -- 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
