Re: [linuxsh-dev] SCI error handling

[NIIBE Y. <gn...@ch...>]

YAEGASHI Takeshi wrote:
 > Well, I'm not convinced of how it should behave itself when
 > multiple errors(and BREAK) occur simultaneously.  I suppose they
 > should be discarded except the most significant one, right?
 > (buffer overrun > BREAK > frame, parity error?)

Well, we need better error handling, definitely.

 > And there are no BREAK detection for SCI(w/o FIFO) port.

Yes, that's my point.  We need this for SCI(w/o FIFO).

With some TTY discipline, BREAK is out-of-band signal (not an error).
Specifically, it works like CTRL-C (INT char with "dec" setting) which
causes SIGINT to the process.

So, while buffer overrun, frame error, and parity error belong to the
"error" handling, break handling is another issue.
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