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 02A35606A31E for ; Wed, 28 Oct 2026 08:04:30 +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=eD8R8WD8; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=PSBniF0w 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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=QYUY+SzuyzidMIs5wvcWQ+wJedzQHVpapr2RX4nAS3g=; b=eD8R8WD8/MgJ479jZd4VMTN/tA OlngqnQSklg0bqwZlVNpKNP7mkJafeDGihFESOJCpCYUiw+a2ehpczC5fbtbNmJOcjYS6JPZWZ1M0 z+PQDXwznDZKUiv5rDrlFOahkDTCNw2q5LOtv1dh2/VrZaxc0etTTrQKe8e5klxkTj/S/DTmsRMev BnWn7zPN9usm8S01qb5qfZ6NiLMinpbXv2sfkevN0xMY6o+3PJs5owsmwshiOVA2CepPwkhUxWULM ruhIWQqr8jS73XcRAQt2hO1BwBSdizHKPttTOqi1gF3V5i0J3f5xnfwupA2xD/iMQUo5TvxZh+dLR giq3Xf0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLydy-00000006VWO-1PHm; Wed, 28 Oct 2026 08:04:22 +0000 Received: from mgamail.intel.com ([192.198.163.8]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLydw-00000006VVy-2kbe; Wed, 28 Oct 2026 08:04:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1793174661; x=1824710661; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=GlCrv/Z8ykZTWKLkjrgizpbqqqsL18IOZ9JsGj4pQww=; b=PSBniF0wd7ppMixld2UUoEB73b1yiGoF8vRXQw+G1YSVuOdfGa10kRy1 PP038b2/20WyHj8Za8s3lOK6A5CKledqp9kljtVsDUOiHC+eGA3zA2vlM MT+/FAI3eBlmS2C57vmTMY/nyWjYUaQySkZWV1rFyvAhDua/Nh3xd3GdY sWwjrfJ8DDi7yQFTihVA+9UVxHpxbl2/Ir0XbFIFvaF+ALvnRLsnNW4NV s/AYwI6IkDwqYskbzcKE+gmmy5RrHX+JztLgLKfgdsnx3gKVSDAKY0OQJ fttgekcrMV59ncuafHN6jde7skpkm3TP+u/EPoo8Z96VcipDy/1yMDhB8 Q==; X-CSE-ConnectionGUID: sLTNwIDxTmaAlDuyi7swfg== X-CSE-MsgGUID: s3VSi+43SgW3p+AG5zAHOw== X-IronPort-AV: E=McAfee;i="6800,10657,11948"; a="1780743" X-IronPort-AV: E=Sophos;i="6.27,182,1787036400"; d="scan'208";a="1780743" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2026 01:04:20 -0700 X-CSE-ConnectionGUID: 3U2XXT5qQFSCkgAuKxEChg== X-CSE-MsgGUID: XN/qcR2yR4S9jibXAKAjrg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,182,1787036400"; d="scan'208";a="4852263" Received: from abityuts-desk1.ger.corp.intel.com (HELO localhost) ([10.245.244.117]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2026 01:04:11 -0700 Date: Wed, 28 Oct 2026 10:04:08 +0200 From: Andy Shevchenko To: James Hilliard Cc: 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 , =?iso-8859-1?Q?Am=E9lie?= Delaunay , Maxime Coquelin , Alexandre Torgue , Laxman Dewangan , Jon Hunter , Thierry Reding , Vignesh Raghavendra , Kunihiko Hayashi , Masami Hiramatsu , dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, imx@lists.linux.dev, linux-mips@vger.kernel.org, linux-tegra@vger.kernel.org, Frank Li Subject: Re: [PATCH v3 1/2] dmaengine: virt-dma: share the DMAengine synchronization callback Message-ID: 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> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261027-submit-mtk-uart-dma-synchronize-v1-v3-1-aad7a6b3c62e@gmail.com> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261028_010420_746338_F6FC4D51 X-CRM114-Status: UNSURE ( 9.23 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.4 (----) 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=-15.9 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 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 Tue, Oct 27, 2026 at 12:22:26PM -0600, 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. ... > drivers/dma/hsu/hsu.c | 9 +-------- > drivers/dma/idma64.c | 9 +-------- Reviewed-by: Andy Shevchenko # hsu, idma64, virt-dma -- With Best Regards, Andy Shevchenko