From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:54774 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754634AbeCVOR4 (ORCPT ); Thu, 22 Mar 2018 10:17:56 -0400 Subject: Patch "e1000e: fix timing for 82579 Gigabit Ethernet controller" has been added to the 3.18-stable tree To: berndfaust@gmail.com, aaron.f.brown@intel.com, alexander.levin@microsoft.com, gregkh@linuxfoundation.org, jacob.e.keller@intel.com, jeffrey.t.kirsher@intel.com, sasha.neftin@intel.com Cc: , From: Date: Thu, 22 Mar 2018 15:17:36 +0100 Message-ID: <1521728256205118@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled e1000e: fix timing for 82579 Gigabit Ethernet controller to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: e1000e-fix-timing-for-82579-gigabit-ethernet-controller.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Mar 22 15:16:04 CET 2018 From: Bernd Faust Date: Thu, 16 Feb 2017 19:42:07 +0100 Subject: e1000e: fix timing for 82579 Gigabit Ethernet controller From: Bernd Faust [ Upstream commit 5313eeccd2d7f486be4e5c7560e3e2be239ec8f7 ] After an upgrade to Linux kernel v4.x the hardware timestamps of the 82579 Gigabit Ethernet Controller are different than expected. The values that are being read are almost four times as big as before the kernel upgrade. The difference is that after the upgrade the driver sets the clock frequency to 25MHz, where before the upgrade it was set to 96MHz. Intel confirmed that the correct frequency for this network adapter is 96MHz. Signed-off-by: Bernd Faust Acked-by: Sasha Neftin Acked-by: Jacob Keller Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/e1000e/netdev.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -3507,6 +3507,12 @@ s32 e1000e_get_base_timinca(struct e1000 switch (hw->mac.type) { case e1000_pch2lan: + /* Stable 96MHz frequency */ + incperiod = INCPERIOD_96MHz; + incvalue = INCVALUE_96MHz; + shift = INCVALUE_SHIFT_96MHz; + adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz; + break; case e1000_pch_lpt: /* On I217, the clock frequency is 25MHz or 96MHz as * indicated by the System Clock Frequency Indication Patches currently in stable-queue which might be from berndfaust@gmail.com are queue-3.18/e1000e-fix-timing-for-82579-gigabit-ethernet-controller.patch