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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 5550AC43441 for ; Tue, 27 Nov 2018 11:50:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2509F2086B for ; Tue, 27 Nov 2018 11:50:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2509F2086B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730058AbeK0Wrh (ORCPT ); Tue, 27 Nov 2018 17:47:37 -0500 Received: from mga12.intel.com ([192.55.52.136]:23356 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729726AbeK0Wrg (ORCPT ); Tue, 27 Nov 2018 17:47:36 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Nov 2018 03:49:58 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,286,1539673200"; d="scan'208";a="94676103" Received: from lahna.fi.intel.com (HELO lahna) ([10.237.72.157]) by orsmga006.jf.intel.com with SMTP; 27 Nov 2018 03:49:54 -0800 Received: by lahna (sSMTP sendmail emulation); Tue, 27 Nov 2018 13:49:53 +0200 Date: Tue, 27 Nov 2018 13:49:53 +0200 From: Mika Westerberg To: Hans de Goede Cc: Andy Shevchenko , Darren Hart , platform-driver-x86@vger.kernel.org, "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, Jonathan Cameron , Wolfram Sang , linux-i2c@vger.kernel.org, Heikki Krogerus , linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 05/13] i2c: acpi: Return error pointers from i2c_acpi_new_device() Message-ID: <20181127114953.GQ2296@lahna.fi.intel.com> References: <20181126150858.16901-1-andriy.shevchenko@linux.intel.com> <20181126150858.16901-6-andriy.shevchenko@linux.intel.com> <20181127090432.GK2296@lahna.fi.intel.com> <98674437-9374-32d4-4b25-dedd0cad5bea@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <98674437-9374-32d4-4b25-dedd0cad5bea@redhat.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 27, 2018 at 10:16:25AM +0100, Hans de Goede wrote: > One problem is that i2c_new_device() currently simply returns NULL on all > errors. Andy, you could take a look how much work it is to make that return > an ERR_PTR too, or just check its return value and return ERR_PTR(-ENXIO) if > it fails for now... I would use -ENODEV here and -EINVAL in case there is no ACPI companion :)