From: Robin Murphy
> Sent: 09 October 2017 18:39
...
> >  - without the IOMMU, block sizes >=128K all settle down into a
> >    suspiciously-periodic error every 2048 sectors.

That stinks of being a problem where either the link TRB is part
way through a USB packet or where a buffer fragment crosses
a 64k boundary.

Neither is allowed.

        David

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