Re: ERROR transfer event TRB DMA ptr not part of current TD

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On Mon, Apr 29, 2013 at 01:02:19PM +0200, Oliver Neukum wrote:
> On Thursday 10 January 2013 10:42:07 Sarah Sharp wrote:
> 
> > The new debugging shows that the host is giving *two* short status
> > completions for a TD.  This only happens when the isoc TD is split into
> > two TRBs because the buffer crosses a 64KB boundary.  The completion
> > event shows that none of the buffer in either TRB was sent.  So this
> > suggests a deeper hardware issue, and we may need to use bounce buffers
> > to work around it.
> > 
> > I'll need to file a bug with our hardware team and cook up a
> > work-around.  So don't send any patches just yet.
> 
> Hi Sarah,
> 
> has this issue been addressed?

I looked into it, and it's not a hardware bug.  It's caused by a change
in how xHCI 1.0 hosts handle short packets, that I didn't catch before
now.  It's relatively harmless, but does need to get fixed.  I've added
it to my JIRA bug tracker, but it's a low priority bug at this point.

Perhaps we just need to add the spurious success quirk for all xHCI 1.0
hosts?

Sarah Sharp
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