netdev - Re: forcedeth problems on 2.6.20-rc6-mm3

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Message-ID: <Pine.LNX.4.64.0702050124320.20138@iabervon.org>
Date:	Mon, 5 Feb 2007 01:34:54 -0500 (EST)
From:	Daniel Barkalow <barkalow@...ervon.org>
To:	Robert Hancock <hancockr@...w.ca>
cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org, Andrew Morton <akpm@...l.org>
Subject: Re: forcedeth problems on 2.6.20-rc6-mm3

On Sun, 4 Feb 2007, Robert Hancock wrote:

> Something's busted with forcedeth in 2.6.20-rc6-mm3 for me relative to
> 2.6.20-rc6. There's no errors in dmesg, but it seems no packets ever get
> received and so the machine can't get an IP address. I tried reverting all the
> -mm changes to drivers/net/forcedeth.c, which didn't help. The network
> controller shares an IRQ with the USB OHCI controller which is receiving
> interrupts, so it doesn't seem like an interrupt routing problem, though I
> suppose something wierd could be happening there.

IIRC, forcedeth tries to use MSI by default. Perhaps the hardware is using 
it, but the kernel thinks enabling it didn't work? I think there's a 
module option for forcedeth to disable MSI, which might be worth a try to 
see if it has any effect.

	-Daniel
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