linux-kernel - Re: WARNING at tty_buffer.c:428 process_one

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Message-ID: <5136554F.3060006@suse.cz>
Date:	Tue, 05 Mar 2013 21:27:59 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	David Miller <davem@...emloft.net>
CC:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Subject: Re: WARNING at tty_buffer.c:428 process_one_work()

On 03/05/2013 09:03 PM, David Miller wrote:
> From: Jiri Slaby <jslaby@...e.cz>
> Date: Tue, 05 Mar 2013 20:44:49 +0100
> 
>> Hi, I must admit I don't understand. I now checked both of them and they
>> call uart_handle_sysrq_char unconditionally, or?
> 
> Nope, in the sunsab.c receive function, we used to handle the SYSRQ
> stuff before break checking when TTY is NULL, now we don't.

But how could tty be NULL in there? subsab enables interrupts after the
TTY is open and disables before it is closed/hupped. So the tty couldn't
be NULL there, right?

-- 
js
suse labs
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