busdma is not properly implemented on 8.0-RELEASE?

[Andrew Belashov]

Hi, All!

After upgrading from FreeBSD 7.2-RELEASE to 8.0-RELEASE there were
problems with USB. Related PR: usb/141918
<http://www.freebsd.org/cgi/query-pr.cgi?pr=usb/141918>

Hans Petter Selasky wrote:
"My guess for this issue is that the cache invalidate and cache flush
instructions are not properly implemented by busdma on your platform."

How to check this guess?

--
With Best Regards,
  Andrew Belashov.