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 04CC7A0A0E; Mon, 10 May 2021 14:09:24 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 121EA4110C; Mon, 10 May 2021 14:09:19 +0200 (CEST) Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) by mails.dpdk.org (Postfix) with ESMTP id E8F52410FF for ; Mon, 10 May 2021 14:09:12 +0200 (CEST) Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Ff0BN0pP5zQlVk; Mon, 10 May 2021 20:05:48 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.498.0; Mon, 10 May 2021 20:09:03 +0800 From: Chengwen Feng To: , CC: Date: Mon, 10 May 2021 20:06:02 +0800 Message-ID: <1620648363-31769-2-git-send-email-fengchengwen@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1620648363-31769-1-git-send-email-fengchengwen@huawei.com> References: <1620648363-31769-1-git-send-email-fengchengwen@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Subject: [dpdk-dev] [PATCH 1/2] net/mlx4: fix memory barrier incorrectly placed 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 Sender: "dev" The memory barrier is used to ensure that the response is returned only after the Tx/Rx function is set, it should place after the Rx/Tx function is set. Fixes: 0203d33a1059 ("net/mlx4: support secondary process") Cc: stable@dpdk.org Signed-off-by: Chengwen Feng --- drivers/net/mlx4/mlx4_mp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/mlx4/mlx4_mp.c b/drivers/net/mlx4/mlx4_mp.c index ddf7bdb..8fcfb54 100644 --- a/drivers/net/mlx4/mlx4_mp.c +++ b/drivers/net/mlx4/mlx4_mp.c @@ -126,7 +126,6 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer) switch (param->type) { case MLX4_MP_REQ_START_RXTX: INFO("port %u starting datapath", dev->data->port_id); - rte_mb(); dev->tx_pkt_burst = mlx4_tx_burst; dev->rx_pkt_burst = mlx4_rx_burst; #ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET @@ -144,6 +143,7 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer) } } #endif + rte_mb(); mp_init_msg(dev, &mp_res, param->type); res->result = 0; ret = rte_mp_reply(&mp_res, peer); -- 2.8.1