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Wysocki" , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , David Airlie , Daniel Vetter , Bjorn Helgaas , Mario Limonciello , Lijo Lazar , "Srinivasan Shanmugam" , Le Ma , =?utf-8?q?Andr=C3=A9_Almeida?= , James Zhu , Aurabindo Pillai , Alex Shi , Jerry Snitselaar , Wei Liu , Robin Murphy , , , Subject: [PATCH 3/3] drm/amdgpu: wire up the can_remove() callback Date: Fri, 2 Feb 2024 17:25:56 -0500 Message-ID: <20240202222603.141240-3-hamza.mahfooz@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240202222603.141240-1-hamza.mahfooz@amd.com> References: <20240202222603.141240-1-hamza.mahfooz@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE30:EE_|PH7PR12MB5928:EE_ X-MS-Office365-Filtering-Correlation-Id: a657c881-da50-4bc1-ec1b-08dc243e0120 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(4636009)(136003)(376002)(346002)(39860400002)(396003)(230922051799003)(186009)(82310400011)(451199024)(64100799003)(1800799012)(40470700004)(46966006)(36840700001)(41300700001)(36756003)(44832011)(82740400003)(70586007)(4326008)(8676002)(70206006)(8936002)(7416002)(2906002)(86362001)(5660300002)(316002)(54906003)(6916009)(36860700001)(356005)(81166007)(6666004)(478600001)(83380400001)(47076005)(336012)(426003)(16526019)(2616005)(26005)(40460700003)(1076003)(40480700001)(36900700001)(16060500005);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Feb 2024 22:26:30.4181 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a657c881-da50-4bc1-ec1b-08dc243e0120 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE30.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB5928 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1789828155784662871 X-GMAIL-MSGID: 1789828155784662871 Removing an amdgpu device that still has user space references allocated to it causes undefined behaviour. So, implement amdgpu_pci_can_remove() and disallow devices that still have files allocated to them from being unbound. Cc: stable@vger.kernel.org Signed-off-by: Hamza Mahfooz --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index cc69005f5b46..cfa64f3c5be5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -2323,6 +2323,22 @@ static int amdgpu_pci_probe(struct pci_dev *pdev, return ret; } +static bool amdgpu_pci_can_remove(struct pci_dev *pdev) +{ + struct drm_device *dev = pci_get_drvdata(pdev); + + mutex_lock(&dev->filelist_mutex); + + if (!list_empty(&dev->filelist)) { + mutex_unlock(&dev->filelist_mutex); + return false; + } + + mutex_unlock(&dev->filelist_mutex); + + return true; +} + static void amdgpu_pci_remove(struct pci_dev *pdev) { @@ -2929,6 +2945,7 @@ static struct pci_driver amdgpu_kms_pci_driver = { .name = DRIVER_NAME, .id_table = pciidlist, .probe = amdgpu_pci_probe, + .can_remove = amdgpu_pci_can_remove, .remove = amdgpu_pci_remove, .shutdown = amdgpu_pci_shutdown, .driver.pm = &amdgpu_pm_ops,