From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 904F142926; Wed, 12 Apr 2023 13:38:39 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 1B8E6410F2; Wed, 12 Apr 2023 13:38:39 +0200 (CEST) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by mails.dpdk.org (Postfix) with ESMTP id 37069406A2 for ; Wed, 12 Apr 2023 13:38:38 +0200 (CEST) Received: from kwepemm000003.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4PxLJ06jMmzKxmv; Wed, 12 Apr 2023 19:36:00 +0800 (CST) Received: from dggpeml500020.china.huawei.com (7.185.36.88) by kwepemm000003.china.huawei.com (7.193.23.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Wed, 12 Apr 2023 19:38:35 +0800 Received: from dggpeml500020.china.huawei.com ([7.185.36.88]) by dggpeml500020.china.huawei.com ([7.185.36.88]) with mapi id 15.01.2507.023; Wed, 12 Apr 2023 19:38:35 +0800 From: "jiangheng (G)" To: "dev@dpdk.org" , "matan@nvidia.com" , "viacheslavo@nvidia.com" Subject: [PATCH] net/mlx5: fix lro update tcp header cksum error Thread-Topic: [PATCH] net/mlx5: fix lro update tcp header cksum error Thread-Index: AdltMteOaZW0hx84TteVXUvFh7iFeg== Date: Wed, 12 Apr 2023 11:38:35 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.136.117.195] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-CFilter-Loop: Reflected X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org csum is the sum of three 16 bits value it must be folded twice to ensure that the upper 16 bits are 0 --- drivers/net/mlx5/mlx5_rx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/mlx5/mlx5_rx.c b/drivers/net/mlx5/mlx5_rx.c index a2be523e9e..ae537dfffa 100644 --- a/drivers/net/mlx5/mlx5_rx.c +++ b/drivers/net/mlx5/mlx5_rx.c @@ -1090,6 +1090,7 @@ mlx5_lro_update_tcp_hdr(struct rte_tcp_hdr *__rte_res= trict tcp, tcp->cksum =3D 0; csum +=3D rte_raw_cksum(tcp, (tcp->data_off >> 4) * 4); csum =3D ((csum & 0xffff0000) >> 16) + (csum & 0xffff); + csum =3D ((csum & 0xffff0000) >> 16) + (csum & 0xffff); csum =3D (~csum) & 0xffff; if (csum =3D=3D 0) csum =3D 0xffff; -- 2.27.0