[Bug 242890] vmxnet3 problem when RSS option is configured

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242890

--- Comment #3 from Patrick Kelsey <pkelsey at freebsd.org> ---
(In reply to Andriy Gapon from comment #2)

When I converted the vmxnet3 driver to iflib, I enabled the RSS code based on
iflib internals and looking sideways at the bnxt driver, and not so much by
thinking through the RSS code's fundamental requirements.

What I saw in the bnxt driver was that it was setting the RSS key using
arc4rand() in bnxt_attach_pre(), and that it is always using the hash value for
the flowid in bnxt_pkt_get_l2().  That lead me to believe that the rss key
value did not have to be anything specific, and is why the way the vmxnet3 code
behaves with respect to this issue is functionally the same as what bnxt does.

If I am not missing something further, perhaps this same issue exists for the
bnxt driver as well.

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