From patchwork Fri Feb 8 20:50:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anirudh Venkataramanan X-Patchwork-Id: 1038969 X-Patchwork-Delegate: jeffrey.t.kirsher@intel.com 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=140.211.166.136; helo=silver.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 silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 43x6qF6DHRz9sMp for ; Sat, 9 Feb 2019 07:54:01 +1100 (AEDT) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 744C32279E; Fri, 8 Feb 2019 20:54:00 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fraVVAEtjNsi; Fri, 8 Feb 2019 20:53:59 +0000 (UTC) Received: from ash.osuosl.org (ash.osuosl.org [140.211.166.34]) by silver.osuosl.org (Postfix) with ESMTP id BF0F92343B; Fri, 8 Feb 2019 20:53:59 +0000 (UTC) X-Original-To: intel-wired-lan@lists.osuosl.org Delivered-To: intel-wired-lan@lists.osuosl.org Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by ash.osuosl.org (Postfix) with ESMTP id BFFB51BF973 for ; Fri, 8 Feb 2019 20:52:27 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id BD45B236B5 for ; Fri, 8 Feb 2019 20:52:27 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dryn2YSI6efK for ; Fri, 8 Feb 2019 20:52:27 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by silver.osuosl.org (Postfix) with ESMTPS id 440A22343B for ; Fri, 8 Feb 2019 20:52:27 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Feb 2019 12:50:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,348,1544515200"; d="scan'208";a="116332339" Received: from shasta.jf.intel.com ([10.166.241.11]) by orsmga008.jf.intel.com with ESMTP; 08 Feb 2019 12:50:44 -0800 From: Anirudh Venkataramanan To: intel-wired-lan@lists.osuosl.org Date: Fri, 8 Feb 2019 12:50:37 -0800 Message-Id: <20190208205043.11975-11-anirudh.venkataramanan@intel.com> X-Mailer: git-send-email 2.14.5 In-Reply-To: <20190208205043.11975-1-anirudh.venkataramanan@intel.com> References: <20190208205043.11975-1-anirudh.venkataramanan@intel.com> Subject: [Intel-wired-lan] [PATCH S11 10/16] ice: don't spam VFs with link messages 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: , MIME-Version: 1.0 Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" From: Mitch Williams Don't send a link message to the VFs unless link actually changes state. This avoids a small timing hole in some VF drivers that can cause an apparent TX hang if they receive a link status message at the wrong time. Although we have fixed the timing hole in the current VF driver, there are still lots of drivers in the field that have this timing hole. Let's not fall into it if we can avoid it. Signed-off-by: Mitch Williams Signed-off-by: Anirudh Venkataramanan Tested-by: Andrew Bowers --- drivers/net/ethernet/intel/ice/ice_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index fb04a5ebdc0b..47cc3f905b7f 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -609,7 +609,8 @@ ice_link_event(struct ice_pf *pf, struct ice_port_info *pi) } } - ice_vc_notify_link_state(pf); + if (!new_link_same_as_old && pf->num_alloc_vfs) + ice_vc_notify_link_state(pf); return 0; }