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b7209d42d9
During a code audit of the various situations that promote ERR_PENDING to
ERROR, it appeared that:
- all muxes use se_fl_set_error() to set it, which chooses either based
on EOI/EOS presence ;
- EOI/EOS that arrive late after ERR_PENDING were not systematically
upgraded to ERROR
This results in confusion about how such ERROR or ERR_PENDING ought to
be handled, which is not quite desirable.
This patch adds a test to se_fl_set() to detect if we're setting EOI or
EOS while ERR_PENDING is present, or the other way around so that any
sequence of EOI/EOS <-> ERR_PENDING results in ERROR being set. This
way there will no longer be possible situations where ERROR is missing
while the other ones are set.