linux-kernel - Re: [PATCH 2/5] TTY: ldisc, move wait idle to caller

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Message-ID: <CA+8MBb+ju0ECRKmV6d0mGEBHsfWeyD3k3UAyZFodTAGwsBDLug@mail.gmail.com>
Date:	Fri, 2 Dec 2011 10:24:18 -0800
From:	Tony Luck <tony.luck@...il.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	gregkh@...e.de, linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Dave Young <hidave.darkstar@...il.com>,
	Dave Jones <davej@...hat.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	Dmitriy Matrosov <sgf.dma@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, stable <stable@...nel.org>
Subject: Re: [PATCH 2/5] TTY: ldisc, move wait idle to caller

On Fri, Dec 2, 2011 at 12:21 AM, Jiri Slaby <jslaby@...e.cz> wrote:
> Thanks. What distro and init do you use? Does the attached patch help?

Patch didn't apply cleanly ... it looks like you have another patch that
deleted these lines:
        if (ret < 0)
                return ret;
from tty_ldisc_wait_idle() ... so I think I hand applied around this by dropping
those lines too - but I might have goofed.

Anyway - the patch as modified by me didn't work. I still see the hang.

Base distro is SLES11-SP1
Init version: sysvinit-2.86-198.20

System is headless (no graphic card) so serial console is all I have.

ia64 early serial console is enabled with boot argument:
console=uart,mmio,0xff5e0000

-Tony
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