[Bug 237666] repeated messages of "uhub_reattach_port: giving up port reset - device vanished"

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237666

--- Comment #131 from Mark Millard <marklmi26-fbsd at yahoo.com> ---
(In reply to bawdyanarchist at disroot.org from comment #130)

Just to avoid misinterpretations of what I've reported:

I run head/CURRENT, not 12.x . It was not an FreeBSD version
upgrade context at all.

What I did that got the problem in an cortex-a72 context
was to build and install the kernel based on -mcpu=cortex-a72
instead of -mcpu=cortex-a53 (same arch, different tunings).
This was without changing versions (still head -r363590 based).
What I did that got rid of the problem was to revert to
my -mcpu=cortex-a53 kernel build (also used on an cortex-a53
system).

So the -mcpu=??? use was sufficient to vary/control the
behavior, other things unchanged.

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