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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by SJ1PEPF00001CEB.mail.protection.outlook.com (10.167.242.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.315.6 via Frontend Transport; Mon, 10 Aug 2026 10:11:11 +0000 Received: from satlexmb10.amd.com (10.181.42.219) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Mon, 10 Aug 2026 05:10:56 -0500 Received: from satlexmb07.amd.com (10.181.42.216) by satlexmb10.amd.com (10.181.42.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Mon, 10 Aug 2026 05:05:00 -0500 Received: from xhdappanad40.xilinx.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.45 via Frontend Transport; Mon, 10 Aug 2026 05:04:57 -0500 From: Golla Nagendra To: , , , , , , CC: , , , , , , Subject: [PATCH V3 1/6] dmaengine: zynqmp_dma: Fix PM usage count handling in probe error path Date: Mon, 10 Aug 2026 15:34:47 +0530 Message-ID: <20260810100452.426320-2-nagendra.golla@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260810100452.426320-1-nagendra.golla@amd.com> References: <20260810100452.426320-1-nagendra.golla@amd.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CEB:EE_|LVXPR12MB999196:EE_ X-MS-Office365-Filtering-Correlation-Id: a03330cd-236f-4e6a-28f4-08def6c7b428 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|7416014|23010399003|36860700016|22082099003|18002099003|10067099003|56012099006|11063799006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: B2e+6lhlh5lBtxUGexigJHD1BwyrBjQnxUT2BPNjGTyOHlP+vs3L4dKNGJJNFPhk2bkhizJk9G14s7sRiM3g4BreC+Fs32VN6wVG2wh+t2dFEHR4KBVn2cpH9z69UcwuC+T0uL6uOdrNddGrQoqHPf3RRnif9pDJ/NO9np48SbTiIWehVA6eKdSlrZxaA63cgUv+BCgGVDkDA5eKGC3vK4SlilxkSMfCXdxn/KwQRdOhQEjVYBvNtiQ1FafMA/Dv0HsYjhoQaYO38X4ktmXT+6hnpmrKmnLLYuBBUYdC1ox0/AU8wUr1G5UNloOulx8QSOZ7CnSHONZsfaOj0kHQvZIv0EfspJSfk5or7OZJfuCzipKmTxpfDtBrW+VVgm81fKujgmL6iLgpjSk0nRe9lpbEvjIqz0EI5pyCALF6CyA5v1NjbJZCPWOQZE0/BIWJ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Aug 2026 10:11:11.3543 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a03330cd-236f-4e6a-28f4-08def6c7b428 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CEB.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LVXPR12MB999196 When pm_runtime_resume_and_get() succeeds during probe, it increments the usage count and enables clocks. If a later step (e.g., channel probe) fails, the error path only called pm_runtime_disable() without a matching pm_runtime_put_sync(), leaking the reference and the clock enable. Add an else branch to drop the usage count acquired by pm_runtime_resume_and_get() when runtime PM is still enabled, letting the PM core suspend/disable clocks on the success-then-later-failure path. Fixes: 64c6f7da8c2c ("dmaengine: zynqmp_dma: Add runtime pm support") Signed-off-by: Golla Nagendra --- Changes in V3: - New patch: split from V2 2/3 per Frank Li's review to keep the PM usage count fix separate from the per-channel reset changes --- drivers/dma/xilinx/zynqmp_dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index f6a812e49ddc..87986f65d24c 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -1152,6 +1152,8 @@ static int zynqmp_dma_probe(struct platform_device *pdev) err_disable_pm: if (!pm_runtime_enabled(zdev->dev)) zynqmp_dma_runtime_suspend(zdev->dev); + else + pm_runtime_put_sync(zdev->dev); pm_runtime_disable(zdev->dev); return ret; } -- 2.43.7