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Date:	Mon, 28 Jan 2013 04:45:56 -0800
From:	Jeff Kirsher <>
To:	Josh Boyer <>
Cc:, Bruce Allan <>,,,,
Subject: Re: [net] e1000e: enable ECC on I217/I218 to catch packet buffer
 memory errors

On Mon, 2013-01-28 at 07:38 -0500, Josh Boyer wrote:
> On Mon, Jan 28, 2013 at 5:43 AM, Jeff Kirsher
> <> wrote:
> > From: Bruce Allan <>
> >
> > In rare instances, memory errors have been detected in the internal packet
> > buffer memory on I217/I218 when stressed under certain environmental
> > conditions.  Enable Error Correcting Code (ECC) in hardware to catch both
> > correctable and uncorrectable errors.  Correctable errors will be handled
> > by the hardware.  Uncorrectable errors in the packet buffer will cause the
> > packet to be received with an error indication in the buffer descriptor
> > causing the packet to be discarded.  If the uncorrectable error is in the
> > descriptor itself, the hardware will stop and interrupt the driver
> > indicating the error.  The driver will then reset the hardware in order to
> > clear the error and restart.
> >
> > Both types of errors will be accounted for in statistics counters.
> >
> > Signed-off-by: Bruce Allan <>
> > Cc: <> # 3.5.x & 3.6.x
> 3.5.x is maintained by Canonical, not officially as a stable kernel (I
> have no idea why).  3.6.x isn't maintained any longer.
> Is this applicable to 3.4.x and 3.7.x?

It is applicable to 3.7.x, not sure if it applicable to 3.4.x.

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