netdev - Re: [PATCH] e1000: Work around 82571 completion timout on Pseries HW

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Message-ID: <20070623082003.GA29471@infradead.org>
Date:	Sat, 23 Jun 2007 09:20:03 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Wen Xiong <wenxiong@...ibm.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Auke Kok <auke-jan.h.kok@...el.com>,
	e1000-devel@...ts.sourceforge.net,
	Kumar Gala <galak@...nel.crashing.org>, jeff@...zik.org,
	netdev@...r.kernel.org, wendyx@...ux.vnet.ibm.com
Subject: Re: [PATCH] e1000: Work around 82571 completion timout on Pseries HW

On Thu, May 17, 2007 at 09:58:03AM -0500, Wen Xiong wrote:
> >>It really shouldn't be there at all because something in either the 
> intel
> >>or pseries hardware is totally buggy and we should disable features in
> >>the buggy one completely.
> 
> Hi,
> 
> Here there are not hardware issue on both Intel or PPC.  The patch is to 
> work around a loop hold on early version of PCI SGI spec. 
> The later PCI Sgi have spec have corrected it.  We can just implement it 
> for PPC only.  Other vendor may have the same issue.

In this case we should add a blacklist for implementations of the old
spec.  There should be a way to find specific bridges in the OF firmware
tree on powerpc and similar things on other platforms aswell.

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