From patchwork Wed Jun 19 17:40:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vedang Patel X-Patchwork-Id: 1118917 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=osuosl.org (client-ip=140.211.166.138; helo=whitealder.osuosl.org; envelope-from=intel-wired-lan-bounces@osuosl.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 45TXKT0bc7z9s00 for ; Thu, 20 Jun 2019 03:40:28 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 8678B86840; Wed, 19 Jun 2019 17:40:27 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dNTzu6NO-fHx; Wed, 19 Jun 2019 17:40:25 +0000 (UTC) Received: from ash.osuosl.org (ash.osuosl.org [140.211.166.34]) by whitealder.osuosl.org (Postfix) with ESMTP id DF294867F0; Wed, 19 Jun 2019 17:40:25 +0000 (UTC) X-Original-To: intel-wired-lan@lists.osuosl.org Delivered-To: intel-wired-lan@lists.osuosl.org Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by ash.osuosl.org (Postfix) with ESMTP id 8B8C11BF2EF for ; Wed, 19 Jun 2019 17:40:24 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 852298669E for ; Wed, 19 Jun 2019 17:40:24 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eh33oHoQQ-x3 for ; Wed, 19 Jun 2019 17:40:23 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by whitealder.osuosl.org (Postfix) with ESMTPS id C501086689 for ; Wed, 19 Jun 2019 17:40:23 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Jun 2019 10:40:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,393,1557212400"; d="scan'208";a="311413582" Received: from vpatel-desk.jf.intel.com (HELO localhost.localdomain) ([10.7.159.52]) by orsmga004.jf.intel.com with ESMTP; 19 Jun 2019 10:40:23 -0700 From: Vedang Patel To: netdev@vger.kernel.org Date: Wed, 19 Jun 2019 10:40:10 -0700 Message-Id: <1560966016-28254-2-git-send-email-vedang.patel@intel.com> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1560966016-28254-1-git-send-email-vedang.patel@intel.com> References: <1560966016-28254-1-git-send-email-vedang.patel@intel.com> Subject: [Intel-wired-lan] [PATCH net-next v4 1/7] igb: clear out tstamp after sending the packet X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jiri@resnulli.us, l@dorileo.org, sergei.shtylyov@cogentembedded.com, jakub.kicinski@netronome.com, jhs@mojatatu.com, m-karicheri2@ti.com, intel-wired-lan@lists.osuosl.org, xiyou.wangcong@gmail.com, davem@davemloft.net MIME-Version: 1.0 Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" skb->tstamp is being used at multiple places. On the transmit side, it is used to determine the launchtime of the packet. It is also used to determine the software timestamp after the packet has been transmitted. So, clear out the tstamp value after it has been read so that we do not report false software timestamp on the receive side. Signed-off-by: Vedang Patel --- drivers/net/ethernet/intel/igb/igb_main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index fc925adbd9fa..f66dae72fe37 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -5688,6 +5688,7 @@ static void igb_tx_ctxtdesc(struct igb_ring *tx_ring, */ if (tx_ring->launchtime_enable) { ts = ns_to_timespec64(first->skb->tstamp); + first->skb->tstamp = 0; context_desc->seqnum_seed = cpu_to_le32(ts.tv_nsec / 32); } else { context_desc->seqnum_seed = 0;