linux-kernel - Re: [RFC PATCH 2/5] hvc_console: Add tty driver flag TTY_DRIVER_RESET

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Message-ID: <20081014104025.517ae734@lxorguk.ukuu.org.uk>
Date:	Tue, 14 Oct 2008 10:40:25 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linux PPC devel <linuxppc-dev@...abs.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Ryan S. Arnold" <rsa@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH 2/5] hvc_console: Add tty driver flag
 TTY_DRIVER_RESET_TERMIOS

On Tue, 14 Oct 2008 11:12:49 +0200
Hendrik Brueckner <brueckner@...ux.vnet.ibm.com> wrote:

> From: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
> 
> After a tty hangup() or close() operation, processes might not reset the
> termio settings to a sane state.

That is the job of the getty task normally. pty is special as the reissue
of the same pty is done as a new device (with new state).

Setting this on the hvc would parallel the PC vt console behaviour but
differ from most other ports.

Anyway its a policy question for PPC64 so if thats how you want it to work

Acked-by: Alan Cox <alan@...hat.com>

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