netdev - Re: e1000: assertion hit in e1000

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Message-ID: <46509B6C.2070604@intel.com>
Date:	Sun, 20 May 2007 12:03:08 -0700
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	cebbert@...hat.com, netdev@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: Re: e1000: assertion hit in e1000_clean(), kernel 2.6.21.1

Herbert Xu wrote:
> Kok, Auke <auke-jan.h.kok@...el.com> wrote:
>>> The source file has four extra lines at the top because of a
>>> trivial wireless patch, so 898 in that code is really 894 in
>>> the stock kernel.
>> please shared that code then.
> 
> I've had a look and e1000 is definitely buggy.
> 
> The problem is that you're calling netif_poll_enable on startup.
> This is *wrong*.
> 
> netif_poll_enable can only be called if you've previously called
> netif_poll_disable.  Otherwise a poll might already be in action
> and you may get a crash like this.
> 
> So perhaps you should divide e1000_up into two sections, one that
> is called on both start and restart and another which is only
> called on restart (i.e., after e1000_down).

OK, that would explain the recent frenzy of reports in this matter. That code 
was only recently merged. I will dig into this and get a patch out as soon as I 
can so you can test this.

Thanks Herbert.

Auke
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