From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 05/13] e1000e: bad short packets received when jumbos enabled on 82579 Date: Fri, 7 Oct 2011 00:18:38 -0700 Message-ID: <1317971926-23145-7-git-send-email-jeffrey.t.kirsher@intel.com> References: <1317971926-23145-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Bruce Allan , netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga01.intel.com ([192.55.52.88]:34234 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758905Ab1JGHSw (ORCPT ); Fri, 7 Oct 2011 03:18:52 -0400 In-Reply-To: <1317971926-23145-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Bruce Allan 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 Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher --- 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