uv_writer: Don't skip later KAIO events when one is EAGAIN

[cole-miller]

@marco6 pointed out this return that should be a continue, which causes us to skip processing some KAIO write results if we get several of them in a batch and one of them has status code EAGAIN.

In practice, when running our test suite, it seems that io_getevents never returns more than one event in this context, which together with the dependence on getting EAGAIN explains why we never noticed this while developing dqlite or raft. But in production we could certainly encounter n_events > 1.

Signed-off-by: Cole Miller cole.miller@canonical.com

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.43%. Comparing base (14bc162) to head (0710242).
Report is 164 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #652      +/-   ##
==========================================
- Coverage   81.22%   77.43%   -3.80%     
==========================================
  Files         192      196       +4     
  Lines       27059    27232     +173     
  Branches     4981     5440     +459     
==========================================
- Hits        21978    21086     -892     
- Misses       3487     4290     +803     
- Partials     1594     1856     +262     

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