netdev - [net-next 05/13] e1000e: bad short packets received when jumbos enabled on 82579

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Message-Id: <1317971926-23145-7-git-send-email-jeffrey.t.kirsher@intel.com>
Date:	Fri,  7 Oct 2011 00:18:38 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Bruce Allan <bruce.w.allan@...el.com>, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 05/13] e1000e: bad short packets received when jumbos enabled on 82579

From: Bruce Allan <bruce.w.allan@...el.com>

When short packets are received with jumbos enabled on 82579, they can be
interpreted to have a receive address that does not match any configured
address.  This is due to a hardware bug that can be worked around by
reducing the number of IPG octets added when the packet is transferred from
the PHY to the MAC.

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>
---
 drivers/net/ethernet/intel/e1000e/ich8lan.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index ad34de0..4f70974 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -1578,7 +1578,7 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
 		ret_val = e1e_wphy(hw, PHY_REG(776, 20), data);
 		if (ret_val)
 			goto out;
-		ret_val = e1e_wphy(hw, PHY_REG(776, 23), 0xFE00);
+		ret_val = e1e_wphy(hw, PHY_REG(776, 23), 0xF100);
 		if (ret_val)
 			goto out;
 		e1e_rphy(hw, HV_PM_CTRL, &data);
-- 
1.7.6.4

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