linux-kernel - Re: 'scheduling while atomic' during ppp connection on 2.6.37.1 and 2.6.38

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Message-ID: <20110321110214.5174f1b2@lxorguk.ukuu.org.uk>
Date:	Mon, 21 Mar 2011 11:02:14 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	Jack Stone <jwjstone@...tmail.fm>, Mac <kmac@...zta.fm>,
	linux-kernel@...r.kernel.org, linux-ppp@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Jiri Slaby <jirislaby@...il.com>
Subject: Re: 'scheduling while atomic' during ppp connection on 2.6.37.1 and
 2.6.38

> Anyway is the test needed at all? I.e. could
> tty->ops->write/chars_in_buffer/ntty_write_room be called with
> port->port.count == 0 at all?

I'm not entirely sure what the Nozomi driver is trying to do. Generally
any case a driver is looking at port->port.count it's a bug and should
not matter with the tty krefs. However the chances are it should be
testing *something* instead in this case.

Alan
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