netdev - Re: [net-2.6 PATCH 4/6] e1000e: 82579 unaccounted missed packets

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Message-Id: <20100922.211104.98876899.davem@davemloft.net>
Date:	Wed, 22 Sep 2010 21:11:04 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, gospo@...hat.com, bphilips@...ell.com,
	bruce.w.allan@...el.com
Subject: Re: [net-2.6 PATCH 4/6] e1000e: 82579 unaccounted missed packets

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Wed, 22 Sep 2010 20:16:18 -0700

> From: Bruce Allan <bruce.w.allan@...el.com>
> 
> On 82579, there is a hardware bug that can cause received packets to not
> get transferred from the PHY to the MAC due to K1 (a power saving feature
> of the PHY-MAC interconnect similar to ASPM L1).  Since the MAC controls
> the accounting of missed packets, these will go unnoticed.  Workaround the
> issue by setting the K1 beacon duration according to the link speed.
> 
> Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
> Tested-by: Jeff Pieper <jeffrey.e.pieper@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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