On Tue, 2015-01-13 at 00:14 -0700, kott wrote:
> Yes with cache disabled, this problem is not seen. Seems to be with a issue
> with l2 cache.
> Thanks kott

Except that there are no known problems with l2 cache on armv7 right
now.  There are known problems with the USB driver using the busdma
routines incorrectly, which accidentally works okay on x86 platforms but
likely not so well on others.

-- Ian


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