From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C9994C43387 for ; Wed, 26 Dec 2018 22:52:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 979BF214D8 for ; Wed, 26 Dec 2018 22:52:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545864779; bh=rv3sXcRDROwvtslbOD1IUBSFvoxGnplcZfx3qdBT2GM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wl1iN337OGNxcZ9NlzGWJOl7xFFV8PiGL6iVQM+130aNk6Zj49hwc6WzATVPa5k8D aXpIwlZupA3eRJitR6XA+9pEmFIRitok6N7N43b6yxt93rTWkL8YWyvXV+tAyW2M3i khuZVAECe/ceURBwvrvrTXFej7cQVQCY7aClmx+w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727938AbeLZWgy (ORCPT ); Wed, 26 Dec 2018 17:36:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:36904 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727906AbeLZWgu (ORCPT ); Wed, 26 Dec 2018 17:36:50 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1567F21902; Wed, 26 Dec 2018 22:36:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545863809; bh=rv3sXcRDROwvtslbOD1IUBSFvoxGnplcZfx3qdBT2GM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LBCmSV18RiL5ae2cQKSjPHcs8YHiAanzzK3UieDQwNkzWLpX/PihWo8EyjwgBJyTI xR6gUXqvv0EMbi5AKfnYMMkumuBfNiVU0G4ZufZO3eHHB+aL6NVWEa5L9she50eiof 4W/JFMvShAk6Px2neU9X1do5sZQz+7XNuY3P1kOs= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Stefan Assmann , Jeff Kirsher , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 32/97] i40e: fix mac filter delete when setting mac address Date: Wed, 26 Dec 2018 17:34:52 -0500 Message-Id: <20181226223557.149329-32-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181226223557.149329-1-sashal@kernel.org> References: <20181226223557.149329-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stefan Assmann [ Upstream commit 158daed16efb1170694e420ae06ba8ba954d82e5 ] A previous commit moved the ether_addr_copy() in i40e_set_mac() before the mac filter del/add to avoid a race. However it wasn't taken into account that this alters the mac address being handed to i40e_del_mac_filter(). Also changed i40e_add_mac_filter() to operate on netdev->dev_addr, hopefully that makes the code easier to read. Fixes: 458867b2ca0c ("i40e: don't remove netdev->dev_addr when syncing uc list") Signed-off-by: Stefan Assmann Tested-by: Andrew Bowers Acked-by: Jacob Keller Signed-off-by: Jeff Kirsher Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/i40e/i40e_main.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 3c342700bf5f..ed9d3fc4aaba 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -1539,17 +1539,17 @@ static int i40e_set_mac(struct net_device *netdev, void *p) netdev_info(netdev, "set new mac address %pM\n", addr->sa_data); /* Copy the address first, so that we avoid a possible race with - * .set_rx_mode(). If we copy after changing the address in the filter - * list, we might open ourselves to a narrow race window where - * .set_rx_mode could delete our dev_addr filter and prevent traffic - * from passing. + * .set_rx_mode(). + * - Remove old address from MAC filter + * - Copy new address + * - Add new address to MAC filter */ - ether_addr_copy(netdev->dev_addr, addr->sa_data); - spin_lock_bh(&vsi->mac_filter_hash_lock); i40e_del_mac_filter(vsi, netdev->dev_addr); - i40e_add_mac_filter(vsi, addr->sa_data); + ether_addr_copy(netdev->dev_addr, addr->sa_data); + i40e_add_mac_filter(vsi, netdev->dev_addr); spin_unlock_bh(&vsi->mac_filter_hash_lock); + if (vsi->type == I40E_VSI_MAIN) { i40e_status ret; -- 2.19.1