From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from DB3PR0202CU003.outbound.protection.outlook.com (mail-northeuropeazon11010008.outbound.protection.outlook.com [52.101.84.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 95D5F4B2CC1 for ; Thu, 3 Sep 2026 14:12:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.84.8 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788444746; cv=fail; b=JPOVI0AiridnP+ZmfdBcP5UV0d4XcQngHU7cCu3Rm+SFPJIqSbYw8REQkz7DWzgFXHWXQSBPt7jsiV1zhNnTBswT4dioC+Lgyb6ZXMBUd4NryMjpojonwJzFkgPgAPLt1pJclu9TVSjdTQw4o9d0NRiavbedzsZmij3Ixf/s+iE= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788444746; c=relaxed/simple; bh=Q2TqatLUsEUZv8ySrN1NnUb09L7BQEA40ozW+rodQgU=; h=From:Subject:Date:Message-Id:Content-Type:To:Cc:MIME-Version; b=TQfiOmGCcUP+bzgMwBStRZtLeKDFzEm6JrDzIgMccN86MG8K6++Z7/YsY0bx0w2KD/cdf0ngYIOjWt75tDcFaboKAIetQ+jzJcTpiqWRMAYpHzxw/qJKGKBVmwliU2lMhQdHQ2Ssr2EDWO3c/bLTA7zHMpuTaKAQb9LW2OQOmPk= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=oss.nxp.com; spf=pass smtp.mailfrom=oss.nxp.com; dkim=pass (2048-bit key) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com header.b=t3IEvduA; arc=fail smtp.client-ip=52.101.84.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=oss.nxp.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.nxp.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com header.b="t3IEvduA" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=MB8Pl8tZXmTeA/UpTnj2iOXTkxSTayywJmUBcrpUJT0QthHFKI5rTBZGw80Yb5pcJnY4Frc9H5BMKcCtkyhda3o/ID6CXYSkEhbO2UxmQHapUyFxEaA9WB+tHP8/T+AsdKYSyEPw7oe9OJDDr1VUEUMQqrozvOte8sUU/ajV42JfrW7sCuHwJOnL+cYE3d3O2z7cZc02ovZpJKEukXPJIurArJOFIIcPWd8s2FFY9fZ1ADBD7m6gVI+qY4cTa+zK+z2WzRKXdlOE5n1zM4mqesmOLRv6u851Faci2/Fh5I0D4bXt6qJOA133UTrWkbAtXyQ94L/YXaLHnABM2bfbMg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=qCPG0kEDS78xJ0ah/aRN88gQ7J5AUD8Pnfr/KlZT+hs=; b=l1bJBKSZQsmC+3Q6elX/hrW0I2bmJtMzCxysFbXKmfiZv1cfIhcUourXN3XRyFVvIAln/IDJIky7JbMfspD8lrQg9YLf0CO4hkROwgrfOog91iCOkCly4XtE0ye7AA695pwB93fwBHrMNHpdkUbiLEW5mkm2niNhrwV5r7iTu5xTxRtPmdyGRE7RsM2qst/nwQfjVAdkXtVWAD7DmcFVNwR7MrY4UL7og101f+7CRNCw47t/uPk6CnqwY1WjWe2v99wTy7E9Z/x6NekeYXsmn+0wTLzAVfQcPvbFCLMZlrb0C7tZ/vPYu2ZoRaqfPsyf7dScsLkt3HGwYAVJUGgkhg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector1-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=qCPG0kEDS78xJ0ah/aRN88gQ7J5AUD8Pnfr/KlZT+hs=; b=t3IEvduApewNaF+Dtl61DNryRUMkOxvxZ5M5bWLTBfTzGCq56B8K0X6pUBNYba535tD/Wloq1JkNdBBsSdsx5Pd7MiY0WL9fXT6gSp8M3QJOmsGuw8oPm9dbPJkifTGv02FJi6i+qG8dq2vfnK846Vhvy4YYGOVMuLWu+hBO/aZBCieQ1hm16/0TizmARNF0lfUqgOtxSk5Hzc68MOTvG84O92THi0hApoNeeUn06p6uvOIEATIoKgV+OowPn1oCTSdfEP0rl52aWrN2QxV6CaJbXVEUXOEF0ldnlfvw4POVjQaP9vG5RvPRYYXI8csK8bHOvDuJ99QPdoNOTaC0Zg== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=oss.nxp.com; Received: from AM8PR04MB7874.eurprd04.prod.outlook.com (2603:10a6:20b:24d::9) by GVXPR04MB10303.eurprd04.prod.outlook.com (2603:10a6:150:1ea::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.360.13; Thu, 3 Sep 2026 14:12:11 +0000 Received: from AM8PR04MB7874.eurprd04.prod.outlook.com ([fe80::ac38:1699:6f18:c5d9]) by AM8PR04MB7874.eurprd04.prod.outlook.com ([fe80::ac38:1699:6f18:c5d9%6]) with mapi id 15.21.0382.007; Thu, 3 Sep 2026 14:12:11 +0000 From: "Peng Fan (OSS)" Subject: [PATCH 0/3] dmaengine: Use non-atomic bit ops where safe Date: Thu, 03 Sep 2026 22:16:11 +0800 Message-Id: <20260903-dma-mask-v1-0-211ffd12c236@nxp.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIACuBmWoC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDSwNj3ZTcRN3cxOJs3ZSUNDOTFHNzgzTzFCWg8oKi1LTMCrBR0bEQfnF pUlZqcglIv1JtLQBYD5vvbAAAAA== X-Change-ID: 20260903-dma-mask-ddf64d770f7d To: Vinod Koul , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Peng Fan X-Mailer: b4 0.16-dev-7bc12 X-ClientProxiedBy: MA5P287CA0129.INDP287.PROD.OUTLOOK.COM (2603:1096:a01:1d2::14) To AM8PR04MB7874.eurprd04.prod.outlook.com (2603:10a6:20b:24d::9) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM8PR04MB7874:EE_|GVXPR04MB10303:EE_ X-MS-Office365-Filtering-Correlation-Id: 84183449-f71c-44ec-6f67-08df09c558de X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|19092799006|23010399003|376014|18002099003|56012099006|6133799003|11063799006|10067099003; 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:AM8PR04MB7874.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(19092799006)(23010399003)(376014)(18002099003)(56012099006)(6133799003)(11063799006)(10067099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?dHhkbi9WVlNMS1lBeUZiZzBPNG9TQnNDZzZhMjQwQzZZMDFDa01HNFRPQkhF?= =?utf-8?B?YXFKUEp5RXVicVNGUjErcUNuWDJmaFRmdk9Sb3Y1UkJmMjR0OU0xRFdBVmli?= =?utf-8?B?TjBCaDZDT2hXNk5VbUJJWkFNa1c4TzdLZXNnSGFGZlljTkx6aVFXM01HenM2?= =?utf-8?B?WkdJTGJtMldYL3R0V2JuaStleThaRFYyb0hLL0ZMbXFrWnU5Ylo4UXNpQkZk?= =?utf-8?B?aWZqU2hsR2ZuZDNEdUlQeEJKcy9uR3BueE1GcnQzWHYrSDdNZUpKdHFIeGxk?= =?utf-8?B?ZUFkTmVvTGkrdGs0WlFkMlNJaVUwUngvYXRneFJxNThLQkJ0aFdpVlBSRmE0?= =?utf-8?B?Mm03dTVWdUVSOG9GaWlTSTd6blhUbmpDNjd0NE1oYkN0YkI1b050eXl5SmdV?= =?utf-8?B?ZlprdEVEUzNtaE9XTE9vVCtxUEw2b2JEZ2hualc5cGxSSGVLUndEMnEvODd2?= =?utf-8?B?UXJJYWF2amVGMkdQSUllL2F3N1p1aktEOUJSb2hnMmg0RjVWVFozSEZyeHBO?= =?utf-8?B?emQrNzhqQXNiOVlGWUVBNk9yV281Q1pBb083SCtJdHBUNC9mR3BIUXRNcVIz?= =?utf-8?B?MFpOa3ZoYlp1K0RIeFZuWU5kblRzV29XU0ZUd2xzWjdrS0I3SysyZTdaTE51?= =?utf-8?B?eXMxbzh5ZmlrYTl4ejA2ZGk3bzdEM1VxdDAzdy9xK1FwUGdWbkFpOU5yRmFE?= =?utf-8?B?SDdqdVpaeFppSzZMOVRObzF4UGhlQTZiODVyWVlmUGI5ZUI3NGk4aGtyRXd3?= =?utf-8?B?RlBOc1lKOWJQNXV3aXhkMUVWY2l1MEV0aXZrZ0VqcWkyL2t3c1ZyNUxsVXpk?= =?utf-8?B?QlhpSXpRYjRZTm0wSjRxSDg1NHdWZWY3K2NDd2s0K3BZWkJ1Syt1RlpUM3I3?= =?utf-8?B?NURkR3FQS1NLM3hnRzM5aENRVWZJQ0pWODRGdE5tb3l2YVorbStGcE5MdjBM?= =?utf-8?B?em52ZktSTktxbEV0SDdqUHYvMUxmMEtIVU9ETi9IOXhCKzcwU1kzblY5Si9z?= =?utf-8?B?ZHVRKzJzZEduamlES25zQlhiNENUQ2ZhRTdlYnRzRzBmd2dNdURFNmxWRXVL?= =?utf-8?B?eFV5bml5d3pyZS9hNGNSdmw0MFRLWFdRNnlFMjNQcjl4bksxYmx4c3JJRjhM?= =?utf-8?B?YjJZKzlDUmh4ZFNORXh1SWhpMmhqK28vcFFnT29Nc3VQUVEwcmpPWW5lRFNm?= =?utf-8?B?TXJpQUQ5MWRyanFKWVgwZnRRYXZwelFkd2gzdWN3QnpzV0VMZ09VbzZTVWNC?= =?utf-8?B?MXdhQXBlenhLKytUSlVRSEdnNVFJMzc1emduNGpxeWwrWDNORTc4OW5uNTA3?= =?utf-8?B?WjZaalRKZDlueklrMjhsWEgyTHJKY0FjTmY2Mk1obDI2YlNyZHM0OW4xK1lp?= =?utf-8?B?d2Mvem1WY1h4VkJrcmU4Ykg0b3EveUFFeE50UWJGOVdSenlmb3ZIUTBiSlVv?= =?utf-8?B?NTEwUDRsV1h1UVlWbGd2MzBZN2RFeEdLdzVHR01WVGkrRitjM2pjNTlReStZ?= =?utf-8?B?eVNGYTRaZzFMYTRhazlHOTc1Z1FUeXBrbkcxSU5FbXdjOTNxaCtTcCtQSFJV?= =?utf-8?B?clFSNks5RWNQb2lXRi9GSnVGUkRUSEd1TEVSQm5ybFM5S0huMFZyMnNuWFFV?= =?utf-8?B?NU1TN0xjaFdrcC9sTnlDWkJvcHZuc01DSEpSamVYbUVWQlQrUTNFZ2dISXIv?= =?utf-8?B?T1hUUnVRM3lGS0IxaEtPQS9zUEJRSjBCbUZtQStTVnErczd4RU90L1lxS2Nh?= =?utf-8?B?NWVCVWMxeEl2QVRXejFod2xWbjdQTWpvd2t1TFRvZ1czNEtzcjdiSlZDdEtV?= =?utf-8?B?MURHMGhEWGZMSVJ1M3NLK0daeXQ2YUl5NmwvVGlSUVNSYk5DT3IxV3RwVFpF?= =?utf-8?B?aFBkZmsraC9wRUgxRkZoRWd0YWxEdTh1RkNxRU5rWndKZ29udksxNVJCSDdX?= =?utf-8?B?SDBSd2swY2hzdzNmS0dQdUkzRmV6RURjWFppZ2dZMHFzK1UrWWhma0hETC8z?= =?utf-8?B?SjhUamdBY2M3OHpFekUxWXkwclRuelV4K0UrWnB6bjlDbjBMZ1dhbFE2UDA4?= =?utf-8?B?U3cvbXNvMmpGUTQzNnlFbDA0N1lZR3RNK01PeUovUkJkbEkxSnI0ZkFXYjJX?= =?utf-8?B?S3VJWEZLRjlyVU5NV3JUWlA0YzVwSk1KU2xTRFVaN0ZHNC85TDdyY0RhcXNh?= =?utf-8?B?QlJjQkN6L2ZIY1ZOWEpFQ2dpTVZ2U0l5b2E0OUpPWlVVVlZocUZxVjVRUENw?= =?utf-8?B?bW5kRE9OVDZ4Z1FqTXExK04rUWtHZGlkRVVnMUJ6SklSeEpoUG9aYmw5b0pN?= =?utf-8?B?YjBYODZUcGVsWlpYMjgyL2w1dW05elRCTFRZU3dOOVN2eXE5MWNIS2tIUG53?= =?utf-8?Q?EJdsHsRvxwOSljKBXri2APX+x/ss2XT6F7zSe?= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 84183449-f71c-44ec-6f67-08df09c558de X-MS-Exchange-CrossTenant-AuthSource: AM8PR04MB7874.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Sep 2026 14:12:11.6922 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: riOwkofIG6hB++I4LbjcgmPXz3GMbqTyCPlQ0Gqh8/xvXqN6a0V3jp2Ijt9Y4ofXpYf92wwGjpLnuhNCDFEQUrmoCiaH8LajF1NNWqluSu/Lb+LUmTUNNTpOA+7bYmrq X-MS-Exchange-Transport-CrossTenantHeadersStamped: GVXPR04MB10303 dma_cap_set()/dma_cap_clear() and imx-sdma event_mask setup use atomic set_bit()/clear_bit() in contexts where no concurrent access is possible: - dma_cap_set()/dma_cap_clear() are called exclusively during driver probe, before dma_async_device_register() makes the device visible. - imx-sdma event_mask[] is zeroed and configured during channel setup while the channel is disabled. Switch both to non-atomic __set_bit()/__clear_bit() equivalents. Signed-off-by: Peng Fan --- Peng Fan (3): dmaengine: Use non-atomic bit ops for cap_mask manipulation dmaengine: imx-sdma: Use non-atomic __set_bit() for event_mask setup dmaengine: imx-sdma: Use __assign_bit() for ownership configuration drivers/dma/imx-sdma.c | 21 +++++---------------- include/linux/dmaengine.h | 4 ++-- 2 files changed, 7 insertions(+), 18 deletions(-) --- base-commit: 89c07d98716a13454ec3fd9f97689e812cc71bd4 change-id: 20260903-dma-mask-ddf64d770f7d Best regards, -- Peng Fan