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mx.microsoft.com 1; spf=pass smtp.mailfrom=windriver.com; dmarc=pass action=none header.from=windriver.com; dkim=pass header.d=windriver.com; arc=none Received: from MW5PR11MB5764.namprd11.prod.outlook.com (2603:10b6:303:197::8) by SA2PR11MB5163.namprd11.prod.outlook.com (2603:10b6:806:113::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5834.15; Fri, 25 Nov 2022 04:12:21 +0000 Received: from MW5PR11MB5764.namprd11.prod.outlook.com ([fe80::601c:88b4:f579:677b]) by MW5PR11MB5764.namprd11.prod.outlook.com ([fe80::601c:88b4:f579:677b%3]) with mapi id 15.20.5857.018; Fri, 25 Nov 2022 04:12:21 +0000 From: Xiaolei Wang To: andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [v2][PATCH 0/1] net: phy: Add link between phy dev and mac dev Date: Fri, 25 Nov 2022 12:12:05 +0800 Message-Id: <20221125041206.1883833-1-xiaolei.wang@windriver.com> X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: SL2P216CA0099.KORP216.PROD.OUTLOOK.COM (2603:1096:101:3::14) To MW5PR11MB5764.namprd11.prod.outlook.com (2603:10b6:303:197::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MW5PR11MB5764:EE_|SA2PR11MB5163:EE_ X-MS-Office365-Filtering-Correlation-Id: cb032857-397e-47ab-aa04-08dace9b4011 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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If the external phy used by current mac interface is managed by another mac interface, it means that this network port cannot work independently, especially when the system suspend and resume, the following trace may appear, so we should create a device link between phy dev and mac dev. WARNING: CPU: 0 PID: 24 at drivers/net/phy/phy.c:983 phy_error+0x20/0x68 Modules linked in: CPU: 0 PID: 24 Comm: kworker/0:2 Not tainted 6.1.0-rc3-00011-g5aaef24b5c6d-dirty #34 Hardware name: Freescale i.MX6 SoloX (Device Tree) Workqueue: events_power_efficient phy_state_machine unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x68/0x90 dump_stack_lvl from __warn+0xb4/0x24c __warn from warn_slowpath_fmt+0x5c/0xd8 warn_slowpath_fmt from phy_error+0x20/0x68 phy_error from phy_state_machine+0x22c/0x23c phy_state_machine from process_one_work+0x288/0x744 process_one_work from worker_thread+0x3c/0x500 worker_thread from kthread+0xf0/0x114 kthread from ret_from_fork+0x14/0x28 Exception stack(0xf0951fb0 to 0xf0951ff8) Xiaolei Wang (1): net: phy: Add link between phy dev and mac dev drivers/net/phy/phy_device.c | 12 ++++++++++++ include/linux/phy.h | 2 ++ 2 files changed, 14 insertions(+)