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Date:	Sat, 27 Mar 2010 07:38:38 +0100
From:	Jrn Engel <>
To:	Robert Hancock <>
Cc:	David Miller <>,,,,
Subject: Re: [Regression] r8169: enable 64-bit DMA by default for PCI
	Express devices (v2)

On Fri, 26 March 2010 19:55:44 -0600, Robert Hancock wrote:
> Well, that one's 36 bits, but it's unclear whether that driver would  
> actually be likely to access anything over 4GB. It's possible that  
> there's just some general problem with 64-bit DMA on that machine.

That may very well be.  I've had trouble using a PCIe card in that
machine as well.  "Solution" was to buy a different computer.  Sad, I
know, but not my money.

> The fact that even stuff like lspci and MII is breaking seems odd,  
> though. It could be that model of card doesn't like the PCIDAC register  
> bit being set (maybe it means something different on that model, or  
> something).
> I suppose a publicly accessible datasheet for these chips is too much to  
> hope for?

Which chips?

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