From patchwork Tue Apr 12 06:28:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 560665 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66810C4167B for ; Tue, 12 Apr 2022 06:57:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347430AbiDLG7V (ORCPT ); Tue, 12 Apr 2022 02:59:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352075AbiDLGzB (ORCPT ); Tue, 12 Apr 2022 02:55:01 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71ED1326ED; Mon, 11 Apr 2022 23:44:54 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id E843CB818BD; Tue, 12 Apr 2022 06:44:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D37EC385A1; Tue, 12 Apr 2022 06:44:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649745891; bh=YQ4+cMZJsMnC7ysgebX1ln8YgoZj4kAtFg5vqp/IsZM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZJDCwfzJlZdRepVfU30GgaXzIPG5+EjS+03rAett2W5oJhw/QUKv8l5MjNnNF+fb3 czTiUQp8Lc29Hag74Xws1dMyPaNqlFIfylo+xE0tgfk5lL3VP/qgxkM885V+Sv92Nq r9t8ohF2TmsLjuAOIE0uLQCw8Gwa9I1dXd8Ncbmg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Colin Winegarden , Pavan Chebbi , Michael Chan , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 084/277] bnxt_en: Eliminate unintended link toggle during FW reset Date: Tue, 12 Apr 2022 08:28:07 +0200 Message-Id: <20220412062944.478460834@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220412062942.022903016@linuxfoundation.org> References: <20220412062942.022903016@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Michael Chan [ Upstream commit 7c492a2530c1f05441da541307c2534230dfd59b ] If the flow control settings have been changed, a subsequent FW reset may cause the ethernet link to toggle unnecessarily. This link toggle will increase the down time by a few seconds. The problem is caused by bnxt_update_phy_setting() detecting a false mismatch in the flow control settings between the stored software settings and the current FW settings after the FW reset. This mismatch is caused by the AUTONEG bit added to link_info->req_flow_ctrl in an inconsistent way in bnxt_set_pauseparam() in autoneg mode. The AUTONEG bit should not be added to link_info->req_flow_ctrl. Reviewed-by: Colin Winegarden Reviewed-by: Pavan Chebbi Signed-off-by: Michael Chan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index af7de9ee66cf..0f276ce2d1eb 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -2074,9 +2074,7 @@ static int bnxt_set_pauseparam(struct net_device *dev, } link_info->autoneg |= BNXT_AUTONEG_FLOW_CTRL; - if (bp->hwrm_spec_code >= 0x10201) - link_info->req_flow_ctrl = - PORT_PHY_CFG_REQ_AUTO_PAUSE_AUTONEG_PAUSE; + link_info->req_flow_ctrl = 0; } else { /* when transition from auto pause to force pause, * force a link change