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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 E432DC33CA4 for ; Fri, 10 Jan 2020 08:02:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE60D2077C for ; Fri, 10 Jan 2020 08:02:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578643333; bh=EGGrFg82AwWBngiHY+ftg7F0R1HyNOaQp8gvY2ISO+Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=QsmCe9PCPt12Sg44pxtWxn7TscYWCsWt2sulni2bTuvBnJp8Ig/2wY1n+NNTMT3vw cQgxUoLANSi4o8lpiR2n/ITnH36fgr21SwZ+TQipnDk4sgx6i3lxu0Sk3tnbxCaxgK EL7paox5fazwXf5UcNHYlhe90gj4A+wGQzL97UMA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726916AbgAJICN (ORCPT ); Fri, 10 Jan 2020 03:02:13 -0500 Received: from mail.kernel.org ([198.145.29.99]:56776 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726401AbgAJICM (ORCPT ); Fri, 10 Jan 2020 03:02:12 -0500 Received: from localhost (unknown [223.226.110.118]) (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 21B1320678; Fri, 10 Jan 2020 08:02:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578643332; bh=EGGrFg82AwWBngiHY+ftg7F0R1HyNOaQp8gvY2ISO+Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=u0L3uzcmQqZZM6x9wv0Y7nfmO3uZwSBsIuGcuVnBO/opMAojueHHAOkK03CZ7Faaj Iov7lqHgklf9rtbq3N+HLmG94IvqUgy/rF/MQH6WWFiPKoWfD+I6nEKKtrfEl2Rqo1 iEmuf/kkc7kUlQpjJOMY7r1rkSL3mBwBxpEGxywA= Date: Fri, 10 Jan 2020 13:31:56 +0530 From: Vinod Koul To: Kunihiko Hayashi Cc: Dan Williams , Masahiro Yamada , Rob Herring , Mark Rutland , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Masami Hiramatsu , Jassi Brar Subject: Re: [PATCH 2/2] dmaengine: uniphier-xdmac: Add UniPhier external DMA controller driver Message-ID: <20200110080156.GG2818@vkoul-mobl> References: <1576630620-1977-3-git-send-email-hayashi.kunihiko@socionext.com> <20191227063411.GG3006@vkoul-mobl> <20200109211219.57FC.4A936039@socionext.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200109211219.57FC.4A936039@socionext.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09-01-20, 21:12, Kunihiko Hayashi wrote: > Hi Vinod, > > Thank you for your comment. > > On Fri, 27 Dec 2019 12:04:11 +0530 wrote: > > > On 18-12-19, 09:57, Kunihiko Hayashi wrote: > > > This adds external DMA controller driver implemented in Socionext > > > UniPhier SoCs. This driver supports DMA_MEMCPY and DMA_SLAVE modes. > > > > > > Since this driver does not support the the way to transfer size > > > unaligned to burst width, 'src_maxburst' or 'dst_maxburst' of > > > > You mean driver does not support any unaligned bursts? > > Yes. If transfer size is unaligned to burst size, the final transfer > will be overrun. That is fine, you shoudl return error for bursts which are not aligned when preparing the descriptors -- ~Vinod