Re: [net] e1000e: enable ECC on I217/I218 to catch packet buffer memory errors

[David Miller <davem@davemloft.net>]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Mon, 28 Jan 2013 02:43:48 -0800

> From: Bruce Allan <bruce.w.allan@intel.com>
> 
> 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 <bruce.w.allan@intel.com>
> Cc: <stable@vger.kernel.org> # 3.5.x & 3.6.x
> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
> ---

Applied.