scottl 07e520e17e Fix a case where a request frame can be composed that requires 2 or more
SGList elements, but there's only enough space in the request frame for
either 1 element or a chain frame pointer.  Previously, the code would
hit the wrong case, add the SGList element, but then fail to add the
chain frame due to lack of space.  Re-arrange the code to catch this case
earlier and handle it.

Sponsored by:	Netflix
2018-02-06 06:55:55 +00:00
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