Re: [PATCH] usb: Clear both buffers when clearing a control transfer TT buffer.

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On Fri, Jun 28, 2013 at 03:24:49PM -0400, Alan Stern wrote:
> Please use Reply-To-All so that your response gets sent to the mailing 
> list as well as to me.  And please don't top-post.
> 
> On Fri, 28 Jun 2013, William Gulland wrote:
> 
> > Yes, two ClearTTBuffer requests seem to be necessary with Intel's CaveCreek
> > integrated rate-matching hub - I've got it into the state where control
> > requests to a USB 1.1 device were failing,
> 
> How did you manage to do that?
> 
> >  but recovered when I sent the
> > hub a ClearTTBuffer for endpoint 0 - but only if I set the IN bit in the
> > request.
> 
> This sounds like a bug in the Intel hub hardware, or at least, 
> unintentional behavior.
> 
> Sarah, is this the sort of thing the Intel engineers would want to know 
> about?

I will send them a report.  However, if this was found on production
hardware, there's probably not much they can do about it for CaveCreek.

Sarah Sharp
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