netdev - 2.6.38 dev_watchdog WARNING

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Message-ID: <4DADC8F2.9050700@canonical.com>
Date:	Tue, 19 Apr 2011 11:40:02 -0600
From:	Tim Gardner <tim.gardner@...onical.com>
To:	netdev <netdev@...r.kernel.org>
Subject: 2.6.38 dev_watchdog WARNING

I'm seeing a lot of these kinds of bugs: WARNING: at 
/build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 
dev_watchdog+0x213/0x220()

The kernel is 2.6.38.2 plus Ubuntu cruft.

A spot check of the 200+ hits on this string indicates they are 
primarily due to these drivers:

ipheth
atl1c
sis900
r8169

As far as I can tell the warning happens when link is down on the media 
(and has never been link UP) and are sent a transmit packet which never 
completes. Is there a net/core or net/sched requirement to which these 
drivers do not conform ? Are they not correctly indicating link status?

rtg
-- 
Tim Gardner tim.gardner@...onical.com
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