From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 7BED6A0AC5 for ; Thu, 2 May 2019 12:51:57 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 3DA14326D; Thu, 2 May 2019 12:51:57 +0200 (CEST) Received: from mellanox.co.il (mail-il-dmz.mellanox.com [193.47.165.129]) by dpdk.org (Postfix) with ESMTP id 9C286325F for ; Thu, 2 May 2019 12:51:55 +0200 (CEST) Received: from Internal Mail-Server by MTLPINE2 (envelope-from dekelp@mellanox.com) with ESMTPS (AES256-SHA encrypted); 2 May 2019 13:51:54 +0300 Received: from mtl-vdi-280.wap.labs.mlnx. (mtl-vdi-280.wap.labs.mlnx [10.128.130.87]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id x42ApsD7011644; Thu, 2 May 2019 13:51:54 +0300 From: Dekel Peled To: yskoh@mellanox.com, shahafs@mellanox.com Cc: dev@dpdk.org Date: Thu, 2 May 2019 13:49:16 +0300 Message-Id: <02664e0b50e375e0b0d4ee05c8ad554295b0ccde.1556794185.git.dekelp@mellanox.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: References: Subject: [dpdk-dev] [PATCH v2] net/mlx5: fix init with zero Rx queues X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 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" Content-Type: text/plain; charset="UTF-8" Message-ID: <20190502104916.A4o62tG1O5UzC4OzCvftijz53oteqbu3OOorJ_nIYP0@z> Recent patch [1] added, at the end of mlx5_dev_configure(), a call to mlx5_proc_priv_init(), initializing process_private data of eth_dev. This call is not reached if PMD is started with zero Rx queues. In this case mlx5_dev_configure() returns earlier due to the check: if (rxqs_n == priv->rxqs_n) return 0; In such a scenario, later references to uninitialized process_private data will result in segmentation fault. For example see in function txq_uar_init(). This patch changes the check logic. The following code is executed if (rxqs_n != priv->rxqs_n), and skipped otherwise. Function mlx5_proc_priv_init() is always invoked, to ensure process_private data is initialized. [1] http://patches.dpdk.org/patch/52629/ Fixes: 120dc4a7dcd3 ("net/mlx5: remove device register remap") Cc: yskoh@mellanox.com Signed-off-by: Dekel Peled Acked-by: Yongseok Koh --- v2: Update logic after code review. --- --- drivers/net/mlx5/mlx5_ethdev.c | 58 ++++++++++++++++++++++-------------------- 1 file changed, 31 insertions(+), 27 deletions(-) diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c index 35d276d..e898c2c 100644 --- a/drivers/net/mlx5/mlx5_ethdev.c +++ b/drivers/net/mlx5/mlx5_ethdev.c @@ -435,33 +435,37 @@ struct ethtool_link_settings { rte_errno = EINVAL; return -rte_errno; } - if (rxqs_n == priv->rxqs_n) - return 0; - DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u", - dev->data->port_id, priv->rxqs_n, rxqs_n); - priv->rxqs_n = rxqs_n; - /* - * WHen using LRO, MPRQ is implicitly enabled. - * Adjust threshold value to ensure MPRQ can be enabled. - */ - if (lro_on && priv->config.mprq.min_rxqs_num > priv->rxqs_n) - priv->config.mprq.min_rxqs_num = priv->rxqs_n; - /* If the requested number of RX queues is not a power of two, use the - * maximum indirection table size for better balancing. - * The result is always rounded to the next power of two. */ - reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ? - priv->config.ind_table_max_size : - rxqs_n)); - ret = mlx5_rss_reta_index_resize(dev, reta_idx_n); - if (ret) - return ret; - /* When the number of RX queues is not a power of two, the remaining - * table entries are padded with reused WQs and hashes are not spread - * uniformly. */ - for (i = 0, j = 0; (i != reta_idx_n); ++i) { - (*priv->reta_idx)[i] = j; - if (++j == rxqs_n) - j = 0; + if (rxqs_n != priv->rxqs_n) { + DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u", + dev->data->port_id, priv->rxqs_n, rxqs_n); + priv->rxqs_n = rxqs_n; + /* + * WHen using LRO, MPRQ is implicitly enabled. + * Adjust threshold value to ensure MPRQ can be enabled. + */ + if (lro_on && priv->config.mprq.min_rxqs_num > priv->rxqs_n) + priv->config.mprq.min_rxqs_num = priv->rxqs_n; + /* + * If the requested number of RX queues is not a power of two, + * use the maximum indirection table size for better balancing. + * The result is always rounded to the next power of two. + */ + reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ? + priv->config.ind_table_max_size : + rxqs_n)); + ret = mlx5_rss_reta_index_resize(dev, reta_idx_n); + if (ret) + return ret; + /* + * When the number of RX queues is not a power of two, the + * remaining table entries are padded with reused WQs and + * hashes are not spread uniformly. + */ + for (i = 0, j = 0; (i != reta_idx_n); ++i) { + (*priv->reta_idx)[i] = j; + if (++j == rxqs_n) + j = 0; + } } ret = mlx5_proc_priv_init(dev); if (ret) -- 1.8.3.1