linux-kernel - Re: tty: closing n_gsm line discipline always times out

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Message-ID: <20170519135840.46da3df0@alans-desktop>
Date:   Fri, 19 May 2017 13:58:40 +0100
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     Sascha Hauer <s.hauer@...gutronix.de>
Cc:     linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Subject: Re: tty: closing n_gsm line discipline always times out

> This option doesn't sound very nice because then userspace needs to know
> details of the protocol that it just wants to use. Also the cleanup
> won't be done if the userspace process is killed for some reason.

The same is basically true of an ioctl unfortunately.

Alan