Andrew Cooper writes ("[PATCH v2 for-4.6 2/3] tools/libxl: Do not fire the
stream callback multiple times"):
> Avoid stacking of check_all_finished() via synchronous teardown of
> tasks. If the _abort() functions call back synchronously,
> stream->completion_callback() ends up getting called twice, as first
> and last check_all_finished() frames observe each task being finished.
Acked-by: Ian Jackson <ian.jack...@eu.citrix.com>
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