Joe
Thank you for working this.
I would love to find out how they expect a customer to make the modification
To  "word  0x1A, and see if the 8th bit is 0 or 1, and to change to 0."

I have in turn asked the ct for the lspci command on eth3, maybe the incorrect setting is upstream.

Again,  thank you.
Regards
Mary



-----Original Message-----
From: Joe Jin 
Sent: Monday, November 26, 2012 8:00 PM
To: Fujinaka, Todd
Cc: Dave, Tushar N; netdev@vger.kernel.org; e1000-devel@lists.sf.net; linux-kernel@vger.kernel.org; Mary Mcgrath
Subject: Re: [E1000-devel] 82571EB: Detected Hardware Unit Hang

On 11/27/12 00:23, Fujinaka, Todd wrote:

If you look at the previous section, DevCap, you'll see that it's 
correctly advertising 256 bytes but the system is negotiating 128 for 
the link to the Ethernet controller. Things on the "other" side of the 
link are controlled outside of the e1000 driver.

Tushar's first suggestion was to check the PCIe payload settings in 
the entire chain. Have you done that? Mismatches will cause hangs.

Hi Todd,

So far I had to know how to modify the maxpayload size, since BIOS have not entry to change this, so I had to use ethtool, now I need to get the offset of MaxPayload size in eeprom, I ever tried to find from Intel online document but failed, any idea?

Thanks in advance,
Joe

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