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Sat, 15 Sep 2018 01:35:19 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::151:b6fe:32c8:cccd]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::151:b6fe:32c8:cccd%9]) with mapi id 15.20.1164.008; Sat, 15 Sep 2018 01:35:19 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Nicholas Mc Guire , Wei Xu , Sasha Levin Subject: [PATCH AUTOSEL 4.4 08/20] ARM: hisi: check of_iomap and fix missing of_node_put Thread-Topic: [PATCH AUTOSEL 4.4 08/20] ARM: hisi: check of_iomap and fix missing of_node_put Thread-Index: AQHUTJRXLMsZxATt9kCQbZIzRi7F1A== Date: Sat, 15 Sep 2018 01:35:10 +0000 Message-ID: <20180915013502.180110-8-alexander.levin@microsoft.com> References: <20180915013502.180110-1-alexander.levin@microsoft.com> In-Reply-To: <20180915013502.180110-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0181;6:MFIq/qTqbtjCVFiWeO3iQe6mQjO20yNZ5U1siZOjTDBDLydX47G8GYHrxze6YVelUjVXKtoHAzQFeHj0+MSaNKYy+o/0feN/uthiVl/bO38orM8PS2RBL134S5pjYNSM+w0mwC3qRPEkHg/f4Ml9jdJ5WxIVrvs+Rti4Lvq4+dOTWz2dXxOMzAXZntFYD0jKs7NzVP8FOIKlHyOogEyk4gNMzJ9uvcqeVgYIEDwN90p2314EDxMc3JZsM3PaBEFhPicMF12jLV06qehvIdS24bqBhmus203LXrv6I4sq2HV2N3jAYks4LNgDCOU9lITP9SSAc1Ljw5MsMNZyFyAgye8+4EGuJ44JjCJYOS/YnXsnS6ffHP98AYKNWEK16s/EN9p4ykf7an4aoywEwi3c4ByaK2wnDh8GL0j4qvTsmJnccdqitWAgq78VGCnlo+JK1QfwZDlqTwKAE3NDnuGMVw==;5:HJeviQ8RvOQIRJFWoK7cFUCjq8UhEhw1EpnkGoUw523K18kBtMRDIM7uyopQdMHHEh10JRmz5A9fkM+lfjjBTUn2Fsku9H6demaLD3F4aTZhOjNwhWaHMT9RaVDWddp7jwOVng+qqzyUMSUdvB6WquH8PzelFLfVMmxvC/wYUQk=;7:PEPMrAg24V8lsS5FSDfrQp2dvuuyQ4YyIEJ++9Ek8/GS6gcjS9yjzbTdArXnjfSxZhHrXbHsRIaVLOw6iUVMQ0aRj5a1Db67zhpRGK5kbnJwP7OJQkH3vM0eEWSGoS6LTVpBZbh/Vw/kX7WxltPfbZUETOREU1QANZkqGl2fVCJwJ9IPrEy4uIHaTJ0m8fwFVfYmOu5uV/fcEvJjr5NCAOrNVr46+Zg4pfoFsxjxzJvtnbSXxeU9BEotRoNTbAA6 x-ms-office365-filtering-correlation-id: 8db6ad74-00e6-4623-095e-08d61aab7f72 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0181; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: cGCvX6R1XwKkovnGa8/JsMNnQEjnCk63avqf4BS1XD6DtnbX9DGbpEmTwVwcYl82unCaqNUcLhSFufrclQB3YSN5zRipPFC559KT92hlVGsnc+HdaIBcRrgw+WAPx5d0KfJUCiVZc0qj43Rkv3HG1cNo9i24/teRx4lp5yTOUb0hpjr7xghz+w1oIZV5DVS2DosSaJcBioXssy589Tw2sPYzyokQKJ0F5OM+bZ6PIISjbIYdn3CWLTDExJqMhDBs2RNw3ntaT2P6LgeW17ISPqbx56z96lImg1tj+P6jL/1kYP3WPqTIapEn5jMdhtxN0BI124WbzgCzbKW+JKqgRrNLaK/DjSjo60qaD1SWDX8= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8db6ad74-00e6-4623-095e-08d61aab7f72 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Sep 2018 01:35:10.2541 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0181 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nicholas Mc Guire [ Upstream commit 81646a3d39ef14749301374a3a0b8311384cd412 ] of_find_compatible_node() returns a device node with refcount incremented and thus needs an explicit of_node_put(). Further relying on an unchecked of_iomap() which can return NULL is problematic here, after all ctrl_base is critical enough for hix5hd2_set_cpu() to call BUG() if not available so a check seems mandated here. Signed-off-by: Nicholas Mc Guire 0002 Fixes: commit 06cc5c1d4d73 ("ARM: hisi: enable hix5hd2 SoC") Signed-off-by: Wei Xu Signed-off-by: Sasha Levin --- arch/arm/mach-hisi/hotplug.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/arm/mach-hisi/hotplug.c b/arch/arm/mach-hisi/hotplug.c index 32870560b280..909bb2493781 100644 --- a/arch/arm/mach-hisi/hotplug.c +++ b/arch/arm/mach-hisi/hotplug.c @@ -180,11 +180,15 @@ static bool hix5hd2_hotplug_init(void) struct device_node *np; =20 np =3D of_find_compatible_node(NULL, NULL, "hisilicon,cpuctrl"); - if (np) { - ctrl_base =3D of_iomap(np, 0); - return true; - } - return false; + if (!np) + return false; + + ctrl_base =3D of_iomap(np, 0); + of_node_put(np); + if (!ctrl_base) + return false; + + return true; } =20 void hix5hd2_set_cpu(int cpu, bool enable) --=20 2.17.1