From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Hurley <peter@hurleysoftware.com>
Subject: Re: [PATCH] Fix data loss in cdc-acm
Date: Wed, 21 Oct 2015 10:58:56 -0400
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On 10/21/2015 08:09 AM, Peter Hurley wrote:
> Be aware that while the N_TTY line discipline ensures that put_char()
> and write() usage will not be interleaved without flush_chars(), other
> line disciplines might not, so at least be sure that driver won't
> crash if that happens.

Sorry, I take that back: certain echoes are output via write() in
OPOST mode, specifically for O_ONLCR and XTABS.