Comment # 3 on bug 1112108 from Jiri Slaby

The commit is:
commit d3736d82e8169768218ee0ef68718875918091a0
Author: Dmitry Safonov <dima@arista.com>
Date:   Wed Jan 9 01:17:40 2019 +0000

    tty: Don't hold ldisc lock in tty_reopen() if ldisc present

It was part of 4.20.4 in tumbleweed. Anything newer should not expose the bug I
mentioned above.

It may make sense to enable the tests again.