From: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date: Sat, 21 Nov 2015 17:21:03 +0000 (+0100)
Subject: Avoid recursive call to ttywrite from ttyread
X-Git-Url: https://git.xinqibao.xyz/st.git/commitdiff_plain/375b28720f7c78e6fac1c274f9dee7c40a78aacb?hp=375b28720f7c78e6fac1c274f9dee7c40a78aacb

Avoid recursive call to ttywrite from ttyread

Ttyread() calls to ttywrite, so if we check for reading before
that for writing in ttywrite we can get a circular call sequence.
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