From patchwork Mon Mar 1 16:05:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 389565 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 CF2B0C433DB for ; Mon, 1 Mar 2021 18:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D06564E31 for ; Mon, 1 Mar 2021 18:54:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240671AbhCASxY (ORCPT ); Mon, 1 Mar 2021 13:53:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:53934 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240419AbhCASqp (ORCPT ); Mon, 1 Mar 2021 13:46:45 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id DAC23652F8; Mon, 1 Mar 2021 17:41:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614620461; bh=rjrBaSKwO2T6eIlNO9REibMHoK2LueiCIOlW4KbwrIA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ivK2UHiJMugEptbDdJ98kvjbdVrv7u/rBM6Y/LlVezdJONVtvU2xjT+OI1Zvo+5Nd Rrp6JlpnmdURkxoo5/YG82V1fadYv2EK+O5E8h4/JyZbU5uDd7NIJVgOvaMSy67Vv9 cD2nD3Lf5U8YO+OX3Mt8rJTwO3c1qur8CJPNVnnI= 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 5.11 161/775] net/mlx5e: E-switch, Fix rate calculation for overflow Date: Mon, 1 Mar 2021 17:05:29 +0100 Message-Id: <20210301161209.594545828@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@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 0e22bfb7c046e7c8ae339f396e78a0976633698c ] 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 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index dd0bfbacad474..717fbaa6ce736 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -5040,7 +5040,7 @@ static int apply_police_params(struct mlx5e_priv *priv, u64 rate, */ if (rate) { rate = (rate * BITS_PER_BYTE) + 500000; - rate_mbps = max_t(u32, do_div(rate, 1000000), 1); + rate_mbps = max_t(u64, do_div(rate, 1000000), 1); } err = mlx5_esw_modify_vport_rate(esw, vport_num, rate_mbps);