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Thu, 11 Jun 2026 09:04:03 -0700 From: Dragos Tatulea To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , David Wei , Jens Axboe CC: , Cosmin Ratiu , , , Subject: [PATCH net] selftests: iou-zcrx: defer listen() until after zcrx setup Date: Thu, 11 Jun 2026 19:03:41 +0300 Message-ID: <20260611160341.3697227-2-dtatulea@nvidia.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PEPF0000000A:EE_|CY8PR12MB7490:EE_ X-MS-Office365-Filtering-Correlation-Id: d12e2eb9-8a21-4a61-6be7-08dec7d31db7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|23010399003|376014|82310400026|36860700016|7416014|6133799003|18002099003|56012099006|11063799006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(23010399003)(376014)(82310400026)(36860700016)(7416014)(6133799003)(18002099003)(56012099006)(11063799006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: VnyJPD+RqfiTdMMlAtE1xwzVUytnyQT/8HA+iA33QwYEIdoCHh/0sjVoH5Pp8+lZwuXwoY1ottPUIDpMulDnUTF9BX2ZPqn1oB95CyiI6Z9hC4RAuNY3bDItMkyoWu6kFAQH7iEkp0Fwdz/kifZzhI01ZQdu9VdnKhiPOTUtNz3TlwNmp74Makzk0Nl4ZaCOX+wXmAXziJ4pzyWT8WBkcXX3Z4eel5ObVL/3v2Qs/NEzZQ3gKcMB8cNJ5QDwdzHNarGA6J8t1fkDU3t6JaGeQzc7na20bNIUK9lCWxJk0qDX9NI/o5A9oQ224P0NEBdarvz+l8JJKHHv5mwHCT8KxynK8BT7yVF4N84Kkh13cvPVI5wO/z3+Paf8EUnFJMI5MoqNdBWkfyJvyiJzNzxCZKSANqcKAYfexBD8dRC544q6s1aRiBXn8KtTAV1bVn9E X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2026 16:04:28.2236 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d12e2eb9-8a21-4a61-6be7-08dec7d31db7 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH3PEPF0000000A.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7490 The server binds the queues for zero-copy after listen(). If the client does a connect() during this time it can fail with EHOSTUNREACH on a cold system. This was encountered with the mlx5 driver where binding the .ndo_queue_start() is a slow operation during which no packets can be exchanged. This change moves listen() after queue binding, when the test server is fully operational. Fixes: 71082faa2c64 ("io_uring/zcrx: add selftest") Signed-off-by: Dragos Tatulea Reviewed-by: Cosmin Ratiu --- tools/testing/selftests/drivers/net/hw/iou-zcrx.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c index 240d13dbc54e..f6a8fc5fac24 100644 --- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c +++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c @@ -351,9 +351,6 @@ static void run_server(void) if (ret < 0) error(1, 0, "bind()"); - if (listen(fd, 1024) < 0) - error(1, 0, "listen()"); - flags |= IORING_SETUP_COOP_TASKRUN; flags |= IORING_SETUP_SINGLE_ISSUER; flags |= IORING_SETUP_DEFER_TASKRUN; @@ -366,6 +363,9 @@ static void run_server(void) if (cfg_dry_run) return; + if (listen(fd, 1024) < 0) + error(1, 0, "listen()"); + add_accept(&ring, fd); tstop = gettimeofday_ms() + 5000; -- 2.54.0