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Miller" , LKML , Anton Lundin Subject: Re: [PATCHv5 net 1/2] net: asix: fix modprobe "sysfs: cannot create duplicate filename" Message-ID: References: <20230317181321.3867173-1-grundler@chromium.org> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230317181321.3867173-1-grundler@chromium.org> X-ClientProxiedBy: AM0PR10CA0007.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:17c::17) To PH0PR13MB4842.namprd13.prod.outlook.com (2603:10b6:510:78::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR13MB4842:EE_|CH2PR13MB3685:EE_ X-MS-Office365-Filtering-Correlation-Id: b440e6de-ce8a-4c15-6268-08db29523b11 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR13MB4842.namprd13.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(4636009)(396003)(39830400003)(366004)(376002)(136003)(346002)(451199018)(2616005)(186003)(966005)(6486002)(4326008)(6666004)(478600001)(83380400001)(54906003)(316002)(66946007)(66476007)(6916009)(66556008)(6506007)(6512007)(8676002)(41300700001)(7416002)(8936002)(5660300002)(44832011)(38100700002)(2906002)(86362001)(36756003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?LQjdCQXm+zeuEeC6TtYkngAXfJk9I468OLv0bsXwfbP4L9CDqGX4kNhxHOGM?= =?us-ascii?Q?LvBC6MCxr0adgwDOaJOAwUZGwbXG/1l8HQi8vpfsJCy9drD+XVCCkx3C0IDF?= =?us-ascii?Q?7wqJhI/nrCewtnnDJ7qZ7FetPG9OIgRaKyNwvvutoo4ZBGLeFf2qAHd8kXi+?= =?us-ascii?Q?x8yAFrNvZe0avn3rP2fHICoartCN1fcFXJFvQWsNOjhrd//DpBEaQu62msuP?= =?us-ascii?Q?39D4g0gKh43OV2m3bxRinz0yZDgy66ip6Ca0wCiUs3V7E1gmruDiNZZU1Ftw?= =?us-ascii?Q?PsfO936XKtka4+rn8+A7cwBC2VWZayi9aaF1VLSOKXXSA8jj/KsKekAHeDEY?= =?us-ascii?Q?9pctTP0RvNUo3/8SYq6iHEo/YqAxIx1yV9D398uzLuGeCckRUlguCsVYs5bt?= =?us-ascii?Q?EWRl4C+WceeG5nb1+XEUaJt5kvvbddgljOadAosHI7/1dbfdNS4x6azgL/oM?= =?us-ascii?Q?WdfLjKMiKE1Mf1BR8ELrrLaTqEl9Czf2nNGoYwDdBzF8vzwyoS9qVvZBA2Ta?= =?us-ascii?Q?Ncf/iGzcZvqM/FQnav6MA4G3eal7lfxrBDZLM1F/tfnCwn1JOpTl41hK/PoD?= =?us-ascii?Q?gWN83hnNG2mx2DYW2mrZ+4X61amaJTuH76TbEuOQGfczcPUtncGTJPNVrrKX?= =?us-ascii?Q?MLrOdEzkzKWjfybTAey2BMRmuRVbtC/uDQF/WFRlQxMS+N9dG/tOk1o4CqZS?= =?us-ascii?Q?R9SgoFrM6tDi/QTCbxRvjfWFFCcev1zcOvdqM8j3QmXo59W1AhuGSwdinLha?= =?us-ascii?Q?KlrGCmmop9C5R9PArJ8IQmUY/LS/DkZWgELUMCTsEWPLZIoJddz5Ko4qD5bW?= =?us-ascii?Q?NVknMcCgNDUy8Fe1MdMH5VfEtM/MsDUjQR7beaFWcRdf7X6UeGsO7Gl8BnH9?= =?us-ascii?Q?MWLgaQLtjiXpFdMBx6eb28EvX6glSc1v7DnJt++a+V7K82gNH+03a6BrO3qq?= =?us-ascii?Q?VTR9WAFcpY2J+BO3MVwb4w7J8J1kZNQDxaL9Wccr1G2aTct3F9QBXnomKD/4?= =?us-ascii?Q?ehSmLjariu0nBMoFNdhAdP6AD0tdwqlpPWOSVGcg1zzbb3rmykiA9M7nu5u5?= =?us-ascii?Q?vBmMvQ+ToeZXgKlKwS69gL1irRUpR2z6eLD89mSzBOlpumyv5wkz2ULR31RM?= =?us-ascii?Q?H3STUPnhSPlfgtlzRm94+NIwwFcMY5+EcYLBer9lJsQt8iscSBOpZQMlD3Qh?= =?us-ascii?Q?yf+BNR3Regnc8bFpksHcuc3gXvyUAy2JMsdd0Zx7d4WMDFuIApYCzNdZAO9r?= =?us-ascii?Q?uaO8adSSeb7Co4IsPD2SIbkpvBHmJ8AYl9OsuZLFZqOVAzIfCmAYh1SsMq95?= =?us-ascii?Q?Vn/iFMRKYUjBU8l0EmnBkucp56BRruQIK1qxK9ZgfnyvAPrgFg8I0vERF8Iw?= =?us-ascii?Q?CYBsOHdQbZsvGsFD0RTRS1Q7HRPzqDQtbezHySJ+lqvimevAD57Jj8K7YAha?= =?us-ascii?Q?CSrIw/FGnGgRFoa+nXrl9/53mGDg5X6iyNu+O82zw9WAE0yJsg9QKVsh3uPR?= =?us-ascii?Q?xOO0dERG3Bsox2SjnT+sKri8tp8kw51yGcZ3vjj1BH3yAXvLazpX8y4VTtr4?= =?us-ascii?Q?GTysgW8n5uJgwpYJMElaoyLPiQK6wjPnwBGWuVR4D6Xiqr8JAfNDp5dYYChz?= =?us-ascii?Q?jwv5E/Ky5/Ovn10eVbzvZjv7j+jyBrVgd/qSBZF1wsepDBlVjwDhf3Dw/Wgy?= =?us-ascii?Q?uUgDOw=3D=3D?= X-OriginatorOrg: corigine.com X-MS-Exchange-CrossTenant-Network-Message-Id: b440e6de-ce8a-4c15-6268-08db29523b11 X-MS-Exchange-CrossTenant-AuthSource: PH0PR13MB4842.namprd13.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Mar 2023 14:48:56.1871 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: fe128f2c-073b-4c20-818e-7246a585940c X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 0AVsiTyoNRyydNOpZvZ8vpsJweDd1ocra7FVl2eXpF1HqRhv/LyrSGxt5NUDjNPsKNIBY/vPaI/ZLoQ5LkK9MROBO+98BStjEAImjzcg4qQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR13MB3685 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 17, 2023 at 11:13:21AM -0700, Grant Grundler wrote: > "modprobe asix ; rmmod asix ; modprobe asix" fails with: > sysfs: cannot create duplicate filename \ > '/devices/virtual/mdio_bus/usb-003:004' > > Issue was originally reported by Anton Lundin on 2022-06-22 (link below). > > Chrome OS team hit the same issue in Feb, 2023 when trying to find > work arounds for other issues with AX88172 devices. > > The use of devm_mdiobus_register() with usbnet devices results in the > MDIO data being associated with the USB device. When the asix driver > is unloaded, the USB device continues to exist and the corresponding > "mdiobus_unregister()" is NOT called until the USB device is unplugged > or unauthorized. So the next "modprobe asix" will fail because the MDIO > phy sysfs attributes still exist. > > The 'easy' (from a design PoV) fix is to use the non-devm variants of > mdiobus_* functions and explicitly manage this use in the asix_bind > and asix_unbind function calls. I've not explored trying to fix usbnet > initialization so devm_* stuff will work. > > Fixes: e532a096be0e5 ("net: usb: asix: ax88772: add phylib support") > Reported-by: Anton Lundin > Link: https://lore.kernel.org/netdev/20220623063649.GD23685@pengutronix.de/T/ > Tested-by: Eizan Miyamoto > Signed-off-by: Grant Grundler Reviewed-by: Simon Horman