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Received: from DB7PR03MB4523.eurprd03.prod.outlook.com (2603:10a6:10:19::27) by DB3PR0302MB3355.eurprd03.prod.outlook.com (2603:10a6:8:8::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4909.17; Mon, 24 Jan 2022 17:34:38 +0000 Received: from DB7PR03MB4523.eurprd03.prod.outlook.com ([fe80::2d1f:654e:f946:1a95]) by DB7PR03MB4523.eurprd03.prod.outlook.com ([fe80::2d1f:654e:f946:1a95%6]) with mapi id 15.20.4909.017; Mon, 24 Jan 2022 17:34:38 +0000 From: Sean Anderson To: Greg Kroah-Hartman , linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Heikki Krogerus , Sean Anderson Subject: [PATCH v2 2/2] usb: ulpi: Call of_node_put correctly Date: Mon, 24 Jan 2022 12:33:44 -0500 Message-Id: <20220124173344.874885-2-sean.anderson@seco.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220124173344.874885-1-sean.anderson@seco.com> References: <20220124173344.874885-1-sean.anderson@seco.com> X-ClientProxiedBy: BL1PR13CA0409.namprd13.prod.outlook.com (2603:10b6:208:2c2::24) To DB7PR03MB4523.eurprd03.prod.outlook.com (2603:10a6:10:19::27) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: c8f439da-a875-49d4-2901-08d9df5fcb74 X-MS-TrafficTypeDiagnostic: DB3PR0302MB3355:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6108; 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Additionally, it should only be called after there are no remaining users. To address the first issue, call of_node_put if later steps in ulpi_register fail. To address the latter, call of_node_put only after calling device_unregister. Signed-off-by: Sean Anderson --- Changes in v2: - New drivers/usb/common/ulpi.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c index 87deb514eb78..c6ba72544f2b 100644 --- a/drivers/usb/common/ulpi.c +++ b/drivers/usb/common/ulpi.c @@ -301,11 +301,11 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi) ret = ulpi_read_id(ulpi); if (ret) - return ret; + goto err; ret = device_register(&ulpi->dev); if (ret) - return ret; + goto err; root = debugfs_create_dir(dev_name(dev), ULPI_ROOT); debugfs_create_file("regs", 0444, root, ulpi, &ulpi_regs_ops); @@ -314,6 +314,10 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi) ulpi->id.vendor, ulpi->id.product); return 0; + +err: + of_node_put(ulpi->dev.of_node); + return ret; } /** @@ -357,8 +361,8 @@ void ulpi_unregister_interface(struct ulpi *ulpi) { debugfs_remove_recursive(debugfs_lookup(dev_name(&ulpi->dev), ULPI_ROOT)); - of_node_put(ulpi->dev.of_node); device_unregister(&ulpi->dev); + of_node_put(ulpi->dev.of_node); } EXPORT_SYMBOL_GPL(ulpi_unregister_interface);