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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 AE3EEC2BA83 for ; Wed, 12 Feb 2020 11:43:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 904C42082F for ; Wed, 12 Feb 2020 11:43:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728303AbgBLLnr (ORCPT ); Wed, 12 Feb 2020 06:43:47 -0500 Received: from mga17.intel.com ([192.55.52.151]:39394 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728139AbgBLLnr (ORCPT ); Wed, 12 Feb 2020 06:43:47 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2020 03:43:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,428,1574150400"; d="scan'208";a="347499795" Received: from lahna.fi.intel.com (HELO lahna) ([10.237.72.163]) by fmsmga001.fm.intel.com with SMTP; 12 Feb 2020 03:43:42 -0800 Received: by lahna (sSMTP sendmail emulation); Wed, 12 Feb 2020 13:43:41 +0200 Date: Wed, 12 Feb 2020 13:43:41 +0200 From: Mika Westerberg To: Andy Shevchenko Cc: Darren Hart , Lee Jones , Greg Kroah-Hartman , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , x86@kernel.org, Zha Qipeng , "David E . Box" , Guenter Roeck , Heikki Krogerus , Wim Van Sebroeck , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 03/18] platform/x86: intel_scu_ipc: Introduce new SCU IPC API Message-ID: <20200212114341.GW2667@lahna.fi.intel.com> References: <20200211132603.73509-1-mika.westerberg@linux.intel.com> <20200211132603.73509-4-mika.westerberg@linux.intel.com> <20200211154841.GF10400@smile.fi.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200211154841.GF10400@smile.fi.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 11, 2020 at 05:48:41PM +0200, Andy Shevchenko wrote: > On Tue, Feb 11, 2020 at 04:25:48PM +0300, Mika Westerberg wrote: > > The current SCU IPC API has been operating on a single instance and > > there has been no way to pin the providing module in place when the SCU > > IPC is in use. > > > > This implements a new API that takes the SCU IPC instance as first > > parameter (NULL means the single instance is being used). The SCU IPC > > instance can be retrieved by calling new function > > intel_scu_ipc_dev_get() that take care of pinning the providing module > > in place as long as intel_scu_ipc_dev_put() is not called. > > > > The old API and constants that are still being used are left there to > > support existing users that cannot be converted easily but they are put > > to a separate header that is subject to be removed eventually. > > Subsequent patches will convert most of the users over to the new API. > > I'm thinking now if it would be better to do this in two steps, i.e. split out > legacy header first and then introduce new API? No problem doing that but I'm not sure what's the benefit over what is done now?