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Wed, 28 Oct 2026 16:18:43 +0100 Message-ID: Date: Wed, 28 Oct 2026 16:18:42 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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; 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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 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