From mboxrd@z Thu Jan  1 00:00:00 1970
From: Corey Minyard <cminyard@mvista.com>
Subject: Re: [PATCH] Add the ability to layer another driver over the serial
 driver
Date: Mon, 11 Dec 2006 11:22:06 -0600
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To: Alan <alan@lxorguk.ukuu.org.uk>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>, Tilman Schmidt <tilman@imap.cc>, linux-serial@vger.kernel.org, Linux Kernel <linux-kernel@vger.kernel.org>, Hansjoerg Lipp <hjlipp@web.de>, Russell Doty <rdoty@redhat.com>

Alan wrote:
>> This is going to require some more thought.  But I believe it can be
>> done with adding a poll routine to the tty_operations structure 
>>     
>
> What status do you need to poll ?
>   
I need to poll for receive and transmit characters so I can do I/O
during panics (interrupts disabled).