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Wed, 19 Feb 2025 23:29:53 +0000 Message-ID: <889918c4-51ae-4216-9374-510e4cbdc3f1@intel.com> Date: Wed, 19 Feb 2025 15:29:52 -0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] net: axienet: Set mac_managed_pm To: Nick Hu , Radhey Shyam Pandey , Andrew Lunn , "David S. Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Michal Simek , Russell King , "Francesco Dolcini" , Praneeth Bajjuri CC: Andrew Lunn , , , References: <20250217055843.19799-1-nick.hu@sifive.com> Content-Language: en-US From: Jacob Keller In-Reply-To: <20250217055843.19799-1-nick.hu@sifive.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0242.namprd03.prod.outlook.com (2603:10b6:303:b4::7) To CO1PR11MB5089.namprd11.prod.outlook.com (2603:10b6:303:9b::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR11MB5089:EE_|LV3PR11MB8577:EE_ X-MS-Office365-Filtering-Correlation-Id: 6dafc638-1cca-4881-9185-08dd513d4ff2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|1800799024|366016|921020|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?RHd6L2huaDZnU0ZONGJLM3VoQ1Z3RXdEOTFEMXZNR2Q2eklmMjliRmxsWDNS?= =?utf-8?B?YXgyaHhpazBNQlBTTEtDWWY2T0JaWDFDTmYzeEc0RTFhVTVrQXU2SjlsNlpP?= =?utf-8?B?VUtLc2lDU202ZU1pdlZvVE0wVGFZWlB4Z01jWjhMNVJCUHJZb2xvTHJCN1ZN?= =?utf-8?B?TGZpUkNtNXh3YkZyWDlUQS96bXpKY3BHakk1RjRrMEh1WG1CL0ozb0p2bm8w?= =?utf-8?B?bm9BZG9kZDEzd0JNNXhzU01uMFZPNElhVVR2Y2JxS2o2Tjc5a21JdC9aaFpC?= =?utf-8?B?ZDMzRGdURHN3Y2dvS0NkNDBVK1hObisrZWpQNHZhS2k0R3dqa3graWtlTkxM?= =?utf-8?B?QkdLMHpzUnVTWno5dHNhUDQ5bFZDWFNxcG5tSDN0V0lneXNoV0IrUlBnb0RJ?= =?utf-8?B?TXNqendIR2ZOQnRGeDlVd3VZKzM2bDZnTkRUMVpYYmFGZXQvMlJaamJkc0NZ?= =?utf-8?B?a1V0aURKL0xaT25GSm0wV2VuTHhTODJPYWpnaXVPOVk0eVIya096c21Xc3hR?= =?utf-8?B?QnJGWDhQU2d1elhvSytUb1hKeml6WnA4aFJRUnF4YThCMjN4ODYydDEzNk5o?= =?utf-8?B?dGNXZkNMMU9vUzhWcThvZTZqV1pucXM1QUpVS29Ob0h1U0lsa01MUkRuY0ZZ?= =?utf-8?B?MzhLRGZTRlJnSElkblJhWlFvellJb1NDRWJMaWRMTXg1Vmg0VkhrZjlSMDVJ?= =?utf-8?B?NEhtaENVOWFuQ2huNVJyMjdMajZ1VEVKZnRPeDJDcGhndkNzWFhubGtmdHVM?= =?utf-8?B?VkVEWEtrakdiZU1CaUlzZEUyelJ1YndpbnRaU3pmTVMxZzRrelEwQm5tSHJy?= =?utf-8?B?NTlPNjI5eWZnS01NQ0dTUmtHb3VNMHZzdzNpU0RaSGtrYzN4eWR4YWx3K1lY?= =?utf-8?B?RjJ4RlFvRDFXL25MN0hDWFNXVVFMSHErdy93Yk9sTGl4Z0FESWVLTENPVmcx?= =?utf-8?B?Q2ZCK1BSTlZ3QmVIR0RWSjdqdHIxNlNUQTdMbERGSW93Wks1TGxzdzVaemsz?= =?utf-8?B?cjdxU2VkaVJuNTNpa0t0NStUOGE3L1BKSW42TlhPMlpGQ09rUHBDQ3hzS3Nt?= =?utf-8?B?UDFhYWdIM25yMlV3TmNNYy9jTjBqR1ljR2pWRnQvRlVHWTYrOHNPMTdyQVZ6?= =?utf-8?B?d2VQclliaHFHRk5naEUvNHlJMWJTRDZEN3FyZUZwcGNaQmR0UjlvV01naTd3?= =?utf-8?B?bTRMLzlwQUdET2k4bjFXUEhGUFNHc2tibXVQbXpXR09xSVE5UHJaeW9JSUhi?= =?utf-8?B?cWtlWGlURGt1cUNIZ3RKOG1WZURLMm42SkhadzAydFpPTll0Y1BtTm96Q1pj?= =?utf-8?B?MFRrRmxlcHpGSngwL1dWSVZOUnJWaFQ5YTBiQ1VweVhqMlF6ZUpBaTNlL2V2?= =?utf-8?B?REdsc3FkQmFqYmdCVmZqbWZDbDgzZjVTMThqeGZBb1dZSGlPdEZiVFlxUzhh?= =?utf-8?B?K0duNUtwSnZXTzRFczZRVHN6SGd5ZVYrbHFEZHZZK2ZGN1I2U2NrbHVNRDcy?= =?utf-8?B?SEJxNjlIV25ieUgxQ09JWGJNSUsxYjlPZ1kxRGFCTGZPbjE4YUVvMFZmRzFW?= =?utf-8?B?cnUzd0xHNHJPV0JleTk5WE11WGxBK0wzWVZHTm5WL2duSndYc0NuVEpVMVMz?= =?utf-8?B?WFBkS3kvUlpaVXN3bDVickdqNUdXaUpEamhVZVlGczRkZVdiSGJsUi9pV0xx?= =?utf-8?B?TzdLVkdFbGdWekxOL2xnZmdKL2lRaEc2Nm9PQnFNVkYxQjdnTm1HOE9rRHdl?= =?utf-8?B?cm5vbXR5d1R6VUl6L2NuU29LczQ4UDNyMHI5WWpaaVdtWStRWFFUdmRUb1VR?= =?utf-8?B?cG5CK2FlTU5USlFLdDFCN3BsKy9OYlB0eElMYnlUTDFISTBsakhjd3AxVGVm?= =?utf-8?B?ZTJiWkx2Tk9IZnRnZTlhSENWRGpPS3FCTUV0cHlGSGI5Sk0yWEFqOEM0VjJs?= =?utf-8?Q?QKtnCFE074w=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CO1PR11MB5089.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(7416014)(1800799024)(366016)(921020)(7053199007);DIR:OUT;SFP:1101; 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The first reset occurs when the axienet > driver calls phylink_of_phy_connect(), and the second occurs when > mdio_bus_phy_resume() invokes phy_init_hw(). The second soft reset of the > external PHY does not reinitialize the internal PHY, which causes issues > with the internal PHY, resulting in the PHY link being down. To prevent > this, setting the mac_managed_pm flag skips the mdio_bus_phy_resume() > function. > > Fixes: a129b41fe0a8 ("Revert "net: phy: dp83867: perform soft reset and retain established link"") > Signed-off-by: Nick Hu > --- Otherwise, the fix seems correct to me. Reviewed-by: Jacob Keller > drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > index 2ffaad0b0477..2deeb982bf6b 100644 > --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > @@ -3078,6 +3078,7 @@ static int axienet_probe(struct platform_device *pdev) > > lp->phylink_config.dev = &ndev->dev; > lp->phylink_config.type = PHYLINK_NETDEV; > + lp->phylink_config.mac_managed_pm = true; > lp->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE | > MAC_10FD | MAC_100FD | MAC_1000FD; >