From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D695606A323 for ; Wed, 28 Oct 2026 16:28:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=kcjcYeAU; dkim=pass (2048-bit key, unprotected) header.d=foss.st.com header.i=@foss.st.com header.a=rsa-sha256 header.s=selector2 header.b=Z64VXJLu DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:CC:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=xyJCK9M6Spjp8gnfvdLjaOCM4a7JNCEx5yYqmNy6PN8=; b=kcjcYeAUA910gu yVbgN3sXvchBsIuC2s3cIgq87dadwFfudsTDGjG7Qy3VIUgO8d1yz8qowBrOiUWrkHhmVK7WMrGNE +hV7T8AlpYSTN1EDMPJDgQ3UPvbSmsS+OwZLXBAelooc839AYdn/nC13j64xGQXDYlZgtwZ/qegmG rx+M0XsWQTinHNtt4Vj64wmuh4iWfyG2lx6Ly+nbqJ3n5mdpqG6/igBmMvPMLOntrF0IBszIy4sTk gKw95cTsiIXsJM+VTqe/8eipl1NgP7bbYR+GaOkyZkQEKXuue2zY1G++Y527hmKMDieixyIN6bXxR YdPBS4KRl+xih1HESeuw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xM5Qj-00000007KHb-1xih; Wed, 28 Oct 2026 15:19:09 +0000 Received: from mail-westeuropeazlp170130006.outbound.protection.outlook.com ([2a01:111:f403:c201::6] helo=AM0PR02CU008.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xM5Qe-00000007KGI-2P2n; Wed, 28 Oct 2026 15:19:08 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=PZThiIFaLbBJF0d/pjycQkTX8sFgMfGVBA5qDsNznQvKBLAJrIfYh3elGzC7/FEba3nqWx9pGHjlaUKjFliY+IYtNut1srwB3uDgiRr/wMtCX4OkvSqIpPFebmqOSP50JF9c/XVekipD9N252uCwQSQLs4kfeCciU/xSDh8Rfo7YOvjB3f2I8rd5Dv7xz6ccsYz3QM6tv1pq+SupJ+k9ZtwFYdLeWwXutexbLQgPK+fDszCWJchMA+WEjPHRCikP+KbTWkrr7DRR6zoXqmIUlueinlIwVNpku4Mdq4N3B+5NYI18t2A8KxHtHjQ/RfQ1MvW6lYPk50xA7AYHv3kFcA== 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=xyJCK9M6Spjp8gnfvdLjaOCM4a7JNCEx5yYqmNy6PN8=; b=TwnOvgxcu2vXH4L4fxkwrfVMdxvs19bSuruhpJYbBA4bFa9+pP1fbc6/YWew516iRXuwpbHzQnYbAkOSe1BscrtbG42m0BsZeUusnyIeL8y/kOLulY2bzkeAY3j2w9klMgCWZJ+OiaWYN9Xqp/O5orQLuvK1MmVcRoECrLDFNRLO9i4EXAuzt8gAraYdFDakknjMM5FQXLmuuCSBiKVI8cKuegSm0gvXxEamAI+SIgBx0EhCF5P6N4UUcCR03WRONyKHS9OIIV+irPhrbHR43HKotN2IXkVfHts9tcCkuE/XHw8XzsZX2zFMddf+YJ1KHwiJKUwCPTjd/maNpD0f5A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=fail (sender ip is 164.130.1.59) smtp.rcpttodomain=gmail.com smtp.mailfrom=foss.st.com; dmarc=fail (p=none sp=none pct=100) action=none header.from=foss.st.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xyJCK9M6Spjp8gnfvdLjaOCM4a7JNCEx5yYqmNy6PN8=; b=Z64VXJLudHoIMlwz55FvlfYIh1tZIHbDwxCtuJ/P4r0W/2N/u9EHcl764kmkX+6cm9RCmqyH7npm6s6LAYUCZMyOyK9R6ZqNb5eDaGBlsAuMxMMOhWHYH8Wd6F/2/ZLiQCTH74/+mw1QeZXvdqfUskpwm0cBNq+kvi02su6sN+I5ipE7nQvjbEeUojRaWqTdi6qTqxJAfBTlObcHszWGUWqKT8nvbHaC6/jU1SjnqhMAVvXMnTTPEFgL7Ictcf0O/HtsJWbkAdzgsgfzxrSO9R5IgqAj6rGF7IDLgokR20/oG8oA6pow9M8HFvxMg5xFoPn+tRs1tYcwZItqt/0tvw== Received: from PR3PR09CA0030.eurprd09.prod.outlook.com (2603:10a6:102:b7::35) by PRAPR10MB5397.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:102:291::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.569.7; Wed, 28 Oct 2026 15:18:46 +0000 Received: from AM7PEPF00000055.EURPRD83.prod.outlook.com (2603:10a6:102:b7:cafe::70) by PR3PR09CA0030.outlook.office365.com (2603:10a6:102:b7::35) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.546.22 via Frontend Transport; Wed, 28 Oct 2026 15:18:46 +0000 X-MS-Exchange-Authentication-Results: mx.microsoft.com 1; spf=fail (sender IP is 164.130.1.59) smtp.mailfrom=foss.st.com; dkim=none (message not signed) header.d=none;dmarc=fail action=none header.from=foss.st.com; Received-SPF: Fail (protection.outlook.com: domain of foss.st.com does not designate 164.130.1.59 as permitted sender) receiver=protection.outlook.com; client-ip=164.130.1.59; helo=smtpO365.st.com; Received: from smtpO365.st.com (164.130.1.59) by AM7PEPF00000055.mail.protection.outlook.com (10.167.242.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.592.0 via Frontend Transport; Wed, 28 Oct 2026 15:18:45 +0000 Received: from STKDAG1NODE2.st.com (10.75.128.133) by smtpo365.st.com (10.250.44.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.46; Wed, 28 Oct 2026 16:19:10 +0100 Received: from [10.252.15.158] (10.252.15.158) by STKDAG1NODE2.st.com (10.75.128.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.46; Wed, 28 Oct 2026 16:18:43 +0100 Message-ID: Date: Wed, 28 Oct 2026 16:18:42 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] dmaengine: virt-dma: share the DMAengine synchronization callback To: James Hilliard , Sean Wang , Vinod Koul , Frank Li , Matthias Brugger , AngeloGioacchino Del Regno , Basavaraj Natikar , Jacky Huang , Shan-Chun Hung , Florian Fainelli , Broadcom internal kernel review list , Ray Jui , "Scott Branden" , Lars-Peter Clausen , Eugeniy Paltsev , Zhou Wang , Longfang Liu , "Andy Shevchenko" , Keguang Zhang , "Binbin Zhou" , Taichi Sugaya , Takao Orito , Maxime Coquelin , Alexandre Torgue , Laxman Dewangan , Jon Hunter , Thierry Reding , Vignesh Raghavendra , Kunihiko Hayashi , "Masami Hiramatsu" CC: , , , , , , , , Frank Li References: <20261027-submit-mtk-uart-dma-synchronize-v1-v3-0-aad7a6b3c62e@gmail.com> <20261027-submit-mtk-uart-dma-synchronize-v1-v3-1-aad7a6b3c62e@gmail.com> Content-Language: en-US From: Amelie Delaunay In-Reply-To: <20261027-submit-mtk-uart-dma-synchronize-v1-v3-1-aad7a6b3c62e@gmail.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: ENXCAS1NODE2.st.com (10.75.128.138) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PEPF00000055:EE_|PRAPR10MB5397:EE_ X-MS-Office365-Filtering-Correlation-Id: a871d6c0-2c87-41eb-5d89-08df3506c267 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|1800799024|7416014|36860700016|376014|82310400026|921020|4143699003|56012099006|11063799006|261009223027099003|261022105027099003|261026121527099003|261026140227099003|261021123027099003|10067099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:164.130.1.59;CTRY:IT;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:smtpO365.st.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(23010399003)(1800799024)(7416014)(36860700016)(376014)(82310400026)(921020)(4143699003)(56012099006)(11063799006)(261009223027099003)(261022105027099003)(261026121527099003)(261026140227099003)(261021123027099003)(10067099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: PsHFW7ZAVZYZrf1X9VX42gZu30dSrSv2yD/56BMJQac7geQqEtDIaEWxpnI/sY2B+CfQ2E2NeYpRYcsiY0vKMz620DKPAS8f6SiulMvK4Swu+tdv/uoDMwFfb7PcplkqvtHTf6GK0zXG7zRy4A8j/ehLLmq1lKHeOVo6C9RfjlaQtcsQKPhE7ikddAH/jj3rDS3k1kzBzo7Z7buWdZISMJrwl7xpbgHk2ImwocYwWgzcO5Vytege6h2w5Rw2yQ9jdhYbqT94d46niNBtIv4MeL1N4JG2QPMURhqLh37c6S9GFy4YqV3/tBKHIwlsCR63ME8+kcAiuFdCwC/VxXaQW1osNdLGg0WFntjhWJYeSoFn7+XiTNKiIJWc9CSDDOvhypk4mkxEZRXiz9lbfkjZjiQSTFyC0MckF1d2QFIXpp4IJD0EP/AgOGGrczPEGqTq X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Oct 2026 15:18:45.7033 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a871d6c0-2c87-41eb-5d89-08df3506c267 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.59];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: AM7PEPF00000055.EURPRD83.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PRAPR10MB5397 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261028_081904_954389_1F6C5977 X-CRM114-Status: UNSURE ( 7.67 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 10/27/26 19:22, James Hilliard wrote: > Several virt-dma drivers implement device_synchronize with a wrapper that > only converts the DMA channel and calls vchan_synchronize(). Provide > vchan_dma_synchronize() with the DMAengine callback signature so these > drivers can assign it directly. > > Document the requirement to stop the channel and prevent new callbacks > before synchronization, and the context in which the callback wait may > run. Replace the equivalent wrappers in the existing drivers with the > shared helper, preserving their callback-wait and descriptor-cleanup > behavior. > > Suggested-by: Frank Li > Signed-off-by: James Hilliard > --- > drivers/dma/stm32/stm32-dma.c | 9 +-------- > drivers/dma/stm32/stm32-dma3.c | 9 +-------- > drivers/dma/stm32/stm32-mdma.c | 9 +-------- > drivers/dma/virt-dma.h | 15 +++++++++++++++ Reviewed-by: Amelie Delaunay # stm32, virt-dma Regards, Amelie