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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 24732CEFC35 for ; Tue, 8 Oct 2024 17:13:52 +0000 (UTC) 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-Owner; bh=tE2W/V6AaG/0w/EzdzBlwJBnhdlO7EE3VuHA5jS9Msk=; b=45ju0oJ42jqSYIqR6ovhUxMWK5 +hwwJmaxOQ67HqgOYYchhRkSD26401UeR7jqAFHleWSheU2H/SNgnUhtL9tRB56o5aTj2MMeZWQqE B1pQ/skb+JUFapjf5tZ2JbiHaK32g2tAvgGSu2LBemDtyjtp/1wodPCPrsYsL+WPwYVYu4TxuTv5P LACTisYEIy9E7qHkTANDtxxHZjp797pw3Sn57b4RuNAQ0N/IyjNzI2nqJgxYD3Lyvmbc87Q5AEhrL 2RvPS1DYT6rr18Qz4OJKWNVEQmHP++6JY1U00PtHGWjg4psPWX/V0sQRlo0tnaoHqoSrPEDj5EoOi BZU17sHg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1syDmG-00000006c3G-3Nk9; Tue, 08 Oct 2024 17:13:40 +0000 Received: from mgamail.intel.com ([192.198.163.10]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1syDky-00000006bzU-2n4B for linux-arm-kernel@lists.infradead.org; Tue, 08 Oct 2024 17:12:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728407540; x=1759943540; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=0fw1hymyyqi0Df5uzZWmYjSJPG0NJZJROfytNQQiCkQ=; b=hLQ1HcRYAMSJu4+TUmWeHfAtqNdkPJgLFP+7wl2vR3mOXNKrcbZd3ToW ajGIUvUdm83gl5AQrrVD57ibNFVJRMsVp6U0+WsyZrmR8z7xF/n/ZQQIY hBs+u3W/JlI4od7bJShl91+rYwIDStFnZ5Kv2T1wzTqhoKxtvA3R6oP3d zqh5VCZaB3oOBqe39ioST6CGBmhCkmheS68E3IKntFJMUJzRN6mIO1bPg GBd5JrLau7DY/dA3fJy6lPvT6gnsDao+c+n8jGEHMKJdnU7/+44JftUAr STL2xmLKkV9ZSt76Whpw8onHz/QPzf1o3Emj35a0/YmXjYKmg3CIzMxb3 A==; X-CSE-ConnectionGUID: YmqSqBUnTq+PKTPvSTrREA== X-CSE-MsgGUID: n4m/G4jCSd2z1BMrqAepAg== X-IronPort-AV: E=McAfee;i="6700,10204,11219"; a="38988013" X-IronPort-AV: E=Sophos;i="6.11,187,1725346800"; d="scan'208";a="38988013" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2024 10:12:19 -0700 X-CSE-ConnectionGUID: KKRpSUlfRYCWaXPJjO7TZQ== X-CSE-MsgGUID: EW0XMCXnSM6l8GusStFT+Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,187,1725346800"; d="scan'208";a="106668324" Received: from black.fi.intel.com ([10.237.72.28]) by fmviesa001.fm.intel.com with ESMTP; 08 Oct 2024 10:12:17 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 77AAC20F; Tue, 08 Oct 2024 20:12:15 +0300 (EEST) Date: Tue, 8 Oct 2024 20:12:15 +0300 From: Andy Shevchenko To: Frank Li Cc: Vinod Koul , Paul Cercueil , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Subject: Re: [PATCH v1 2/4] dmaengine: Use dma_request_channel() instead of __dma_request_channel() Message-ID: References: <20241007150852.2183722-1-andriy.shevchenko@linux.intel.com> <20241007150852.2183722-3-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241008_101220_740258_396915F7 X-CRM114-Status: GOOD ( 16.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Oct 07, 2024 at 12:01:22PM -0400, Frank Li wrote: > On Mon, Oct 07, 2024 at 06:06:46PM +0300, Andy Shevchenko wrote: > > Let's reduce the surface of the use of __dma_request_channel(). > > Hopefully we can make it internall to the DMA drivers or kill for good > > completely. > > Suggest: > > Reduce use internal __dma_request_channel() function in public > dmaengine.h Okay. > I think this change is okay, but I hope the following patches, which make > __dma_request_channel() as internal only. otherwise, it looks not necessary. As explained in the commit message it's the first baby step to this direction. But sure, when I have more time I'll continue. In any case I think this change is good on this own as it shows the use inside the header. The people who want to have an example of the use may wrongly take the existing code as "good to go" and this even might pass the review somewhere. That said, it's not only reducing the use, but has an educational purpose as well. -- With Best Regards, Andy Shevchenko