On Fri, 26 Oct 2012, Sarah Sharp wrote: > On Fri, Oct 26, 2012 at 03:01:32PM -0700, Sarah Sharp wrote: > > The USB core isn't dropping the endpoints before it calls > > xhci_check_bandwidth. I remember running into this bug a while back, > > and I even started on a fix, but then couldn't reproduce the problem. > > I found the branch with the old fix on it, but it still needs a bit of > > work. I'll send you a patch on Monday. > > Matthias, can you try the attached patch? You should be able to echo 1 > to the configuration file after this is applied. It seems that this patch should go farther than it does. Basically, what you are doing amounts to splitting usb_hcd_alloc_bandwidth() up into two separate routines: one for altsetting changes and one for config changes. But that's not how the new code is structured and as a result it ends up looking rather tortuous. Also, I don't like the way we repeat that "find altsetting 0 or use the first altsetting" logic in several places. We should have a single routine that determines which alternate interfaces will be installed as part of a new config. 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
