From mboxrd@z Thu Jan  1 00:00:00 1970
From: "David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH] Prevent netpoll hanging when link is down
Date: Thu, 7 Oct 2004 15:08:50 -0700
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To: Colin Leroy <colin@colino.net>
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On Thu, 7 Oct 2004 22:44:22 +0200
Colin Leroy <colin@colino.net> wrote:

> On 07 Oct 2004 at 11h10, David S. Miller wrote:
> 
> Hi again, 
> 
> > So, netpoll needs to have the NETIF_F_LLTX stuff added to it.
> 
> This patch should do that. It works OK for me, but I'd like it checked
> before sent upstream...
> 
> However, it doesn't fix the hang. it looks like this hang is really
> coming from sungem.

Is it hanging inside of the ->hard_start_xmit() call or somewhere
else?  Do you have a way to determine this without adding printk()'s
and thus causing recursion as you mentioned earlier? :-)