On Thu, 17 May 2012, Oncaphillis wrote: > > I suspect the values for "wait" are much too small. The EHCI > > specification doesn't really say what they should be. Try > > replacing the entire code snippet above with > > > > udelay(1000); > > > > and see if that makes any difference. > > This looks very promising indeed. I've inserted the second patch > of Huan Li (not the one which killed the kernel) and your > modification and have a stable run for more then 8 hours. > > I assume the modified udelay is not supposed to be a permanent > fix for a production kernel. So how do we proceed ? A proper fix will have to wait. It would require a bunch of other changes which are in my pipeline. For the moment, you might be able to experiment to see how low the delay can get before the problem starts to appear. 1000 may be more than you need. Does 250 work? Huajun Li can submit his second patch regardless. I think it's not related to your problem but it makes sense. 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
