I'm looking into it right now.  Stay tuned.

On Mon, Aug 04, 2008 at 02:40:20PM -0700, David Miller wrote:
quoted text
> From: "Michael Chan" <mchan@broadcom.com>
> Date: Mon, 04 Aug 2008 07:20:40 -0700
> 
> > This was introduced by:
> > 
> > tg3: adapt tg3 to use reworked PCI PM code
> > 
> > Adapt the tg3 driver to use the reworked PCI PM and make it use the
> > exported PCI PM core functions instead of accessing the PCI PM registers
> > directly by itself.
> > 
> > Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> > Signed-off-by: David S. Miller <davem@davemloft.net>
> > 
> > In the original tg3 code, we used udelay() when switching to D0 state
> > since we were inside tg3_full_lock().
> 
> Right, this change was obviously not tested properly.
> 
> I'm likely going to revert unless a really good fix shows up fast.
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