From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v3,1/2] dmaengine: sh: rcar-dmac: With cyclic DMA residue 0 is valid From: Vinod Koul Message-Id: <20190423051554.GF28103@vkoul-mobl> Date: Tue, 23 Apr 2019 10:45:54 +0530 To: Dirk Behme Cc: linux-renesas-soc@vger.kernel.org, dmaengine@vger.kernel.org, geert+renesas@glider.be, niklas.soderlund+renesas@ragnatech.se, laurent.pinchart+renesas@ideasonboard.com, Achim.Dahlhoff@de.bosch.com, yoshihiro.shimoda.uh@renesas.com, ylhuajnu@outlook.com, hiroyuki.yokoyama.vx@renesas.com, kuninori.morimoto.gx@renesas.com, stable@vger.kernel.org List-ID: T24gMTItMDQtMTksIDA3OjI5LCBEaXJrIEJlaG1lIHdyb3RlOgo+IEhhdmluZyBhIGN5Y2xpYyBE TUEsIGEgcmVzaWR1ZSAwIGlzIG5vdCBhbiBpbmRpY2F0aW9uIG9mIGEgY29tcGxldGVkCj4gRE1B LiBJbiBjYXNlIG9mIGN5Y2xpYyBETUEgbWFrZSBzdXJlIHRoYXQgZG1hX3NldF9yZXNpZHVlKCkg aXMgY2FsbGVkCj4gYW5kIHdpdGggdGhpcyBhIHJlc2lkdWUgb2YgMCBpcyBmb3J3YXJkZWQgY29y cmVjdGx5IHRvIHRoZSBjYWxsZXIuCgpBcHBsaWVkIGJvdGgsIHRoYW5rcwo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81500C282E1 for ; Tue, 23 Apr 2019 05:16:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 502672177B for ; Tue, 23 Apr 2019 05:16:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555996561; bh=SaKbq3VWldnSqZadWRhgrbRg6S9DDhZgQ0cGocH1CM8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=lVmjvg6sFB0rdzWafYaJVgqzAVo3720L5R17h5+3tk9+5Jx0bmztXOHvUCaMCmbGj wzrcGR7tuHZkWBMKN0do+K6MsOF8BAQuAbCjspWxv13hEliKubKVp1/LeNJf4KpHGv i9yCM+QdProdFY2EKZFbE1DQi1XACGzjeX1xRPGI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725970AbfDWFQA (ORCPT ); Tue, 23 Apr 2019 01:16:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:33916 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725882AbfDWFQA (ORCPT ); Tue, 23 Apr 2019 01:16:00 -0400 Received: from localhost (unknown [171.76.113.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 395F22064A; Tue, 23 Apr 2019 05:15:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555996559; bh=SaKbq3VWldnSqZadWRhgrbRg6S9DDhZgQ0cGocH1CM8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tQQMUbVUsLWRkjAP2inONF1dSy8LWxbDXjvjCThdk7DyNME4SEGVBHWWnTWgxUtqJ bG6MkzHnxf84u7FmTLGlS3Qd6nnBYjstLEYHyImXlTjRivQ7/GCecBfwR6/5E0BffQ rQStLLPzwfh0XZUPXYDufuQZgRJJ7XrZvIUYf1LA= Date: Tue, 23 Apr 2019 10:45:54 +0530 From: Vinod Koul To: Dirk Behme Cc: linux-renesas-soc@vger.kernel.org, dmaengine@vger.kernel.org, geert+renesas@glider.be, niklas.soderlund+renesas@ragnatech.se, laurent.pinchart+renesas@ideasonboard.com, Achim.Dahlhoff@de.bosch.com, yoshihiro.shimoda.uh@renesas.com, ylhuajnu@outlook.com, hiroyuki.yokoyama.vx@renesas.com, kuninori.morimoto.gx@renesas.com, stable@vger.kernel.org Subject: Re: [PATCH v3 1/2] dmaengine: sh: rcar-dmac: With cyclic DMA residue 0 is valid Message-ID: <20190423051554.GF28103@vkoul-mobl> References: <20190412052914.16006-1-dirk.behme@de.bosch.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline In-Reply-To: <20190412052914.16006-1-dirk.behme@de.bosch.com> User-Agent: Mutt/1.11.3 (2019-02-01) Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Message-ID: <20190423051554.z89bRi4-xaK3b0UdqHHtUUXXeGR57rj0223H7sh5DSM@z> On 12-04-19, 07:29, Dirk Behme wrote: > Having a cyclic DMA, a residue 0 is not an indication of a completed > DMA. In case of cyclic DMA make sure that dma_set_residue() is called > and with this a residue of 0 is forwarded correctly to the caller. Applied both, thanks -- ~Vinod