netdev - Re: [E1000-devel] REGRESSION: panic on e1000 driver

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Date:	Fri, 1 Jun 2007 07:48:12 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Kok, Auke" <auke-jan.h.kok@...el.com>
Cc:	Doug Chapman <doug.chapman@...com>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: Re: [E1000-devel] REGRESSION: panic on e1000 driver

On Thu, May 31, 2007 at 08:23:24AM -0700, Kok, Auke wrote:
>
> >e1000: 0000:01:02.0: e1000_probe: (PCI-X:66MHz:64-bit) 00:15:60:04:d7:f8
> >e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
> >e1000: 0000:01:02.1: e1000_probe: (PCI-X:66MHz:64-bit) 00:15:60:04:d7:f9
> >e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection
> >e1000: 0000:15:02.0: e1000_probe: (PCI-X:66MHz:64-bit) 00:12:79:9e:b7:c4
> >e1000: eth2: e1000_probe: Intel(R) PRO/1000 Network Connection
> >e1000: 0000:15:02.1: e1000_probe: (PCI-X:66MHz:64-bit) 00:12:79:9e:b7:c5
> >e1000: eth3: e1000_probe: Intel(R) PRO/1000 Network Connection
> >e1000: Unexpected interrupt icr=0x4
> 
> that's indeed the link status change we fire manually to trigger the 
> watchdog run:
> 
> #define E1000_ICR_LSC           0x00000004 /* Link Status Change */

This still makes no sense.  The only triggers I can find for this occur
after e1000_irq_enable.  So unless we've got a problem with memory
barriers we shouldn't get the above printk.

Is there another trigger that happens earlier?

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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