From patchwork Tue Feb 2 13:38:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 375206 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 C9F85C43381 for ; Tue, 2 Feb 2021 18:32:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B66164F6A for ; Tue, 2 Feb 2021 18:32:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233834AbhBBScV (ORCPT ); Tue, 2 Feb 2021 13:32:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:47926 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233832AbhBBOFc (ORCPT ); Tue, 2 Feb 2021 09:05:32 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2422765014; Tue, 2 Feb 2021 13:48:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1612273727; bh=Lont0lAymu1G39Fvg/lX5vpgtoddSb4j1jeGrIPvqnk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pXG1a4RcSrVZAm5psglVxtbDyRpiS5NjLEN8+08OYgPvddoWzm1KA2mDblSZNYQV4 SexNZZ6as7SbOrwUa2At/rXSPnY9bX2Y0b8GEIqUpta5nvsdvpANivUWuiiH3Gv+Sj PrGCfrqgHTYgg5cvkWgCJP0bf2qldKWW+70GVB8A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Parav Pandit , Eli Cohen , Saeed Mahameed , Sasha Levin Subject: [PATCH 5.4 49/61] net/mlx5e: E-switch, Fix rate calculation for overflow Date: Tue, 2 Feb 2021 14:38:27 +0100 Message-Id: <20210202132948.554199818@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210202132946.480479453@linuxfoundation.org> References: <20210202132946.480479453@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Parav Pandit [ Upstream commit 1fe3e3166b35240615ab7f8276af2bbf2e51f559 ] rate_bytes_ps is a 64-bit field. It passed as 32-bit field to apply_police_params(). Due to this when police rate is higher than 4Gbps, 32-bit calculation ignores the carry. This results in incorrect rate configurationn the device. Fix it by performing 64-bit calculation. Fixes: fcb64c0f5640 ("net/mlx5: E-Switch, add ingress rate support") Signed-off-by: Parav Pandit Reviewed-by: Eli Cohen Signed-off-by: Saeed Mahameed Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index ec117e4414250..37051a4820a08 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -57,6 +57,7 @@ #include "lib/devcom.h" #include "lib/geneve.h" #include "diag/en_tc_tracepoint.h" +#include struct mlx5_nic_flow_attr { u32 action; @@ -3943,13 +3944,13 @@ errout: return err; } -static int apply_police_params(struct mlx5e_priv *priv, u32 rate, +static int apply_police_params(struct mlx5e_priv *priv, u64 rate, struct netlink_ext_ack *extack) { struct mlx5e_rep_priv *rpriv = priv->ppriv; struct mlx5_eswitch *esw; + u32 rate_mbps = 0; u16 vport_num; - u32 rate_mbps; int err; vport_num = rpriv->rep->vport; @@ -3966,7 +3967,11 @@ static int apply_police_params(struct mlx5e_priv *priv, u32 rate, * Moreover, if rate is non zero we choose to configure to a minimum of * 1 mbit/sec. */ - rate_mbps = rate ? max_t(u32, (rate * 8 + 500000) / 1000000, 1) : 0; + if (rate) { + rate = (rate * BITS_PER_BYTE) + 500000; + rate_mbps = max_t(u32, do_div(rate, 1000000), 1); + } + err = mlx5_esw_modify_vport_rate(esw, vport_num, rate_mbps); if (err) NL_SET_ERR_MSG_MOD(extack, "failed applying action to hardware");