From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752704AbaEUOnO (ORCPT ); Wed, 21 May 2014 10:43:14 -0400 Received: from mga01.intel.com ([192.55.52.88]:14757 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752076AbaEUOnM (ORCPT ); Wed, 21 May 2014 10:43:12 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,880,1392192000"; d="scan'208";a="535484422" Message-ID: <1400683387.13930.26.camel@rzhang1-toshiba> Subject: Re: [PATCH V6 09/11] ACPI: introduce flag .is_master_device From: Zhang Rui To: Mika Westerberg Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, bhelgaas@google.com, matthew.garrett@nebula.com, rafael.j.wysocki@intel.com, dmitry.torokhov@gmail.com Date: Wed, 21 May 2014 22:43:07 +0800 In-Reply-To: <20140521085207.GR1651@lahna.fi.intel.com> References: <1400136256-2218-1-git-send-email-rui.zhang@intel.com> <1400136256-2218-10-git-send-email-rui.zhang@intel.com> <20140521085207.GR1651@lahna.fi.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.8.4-0ubuntu1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On δΈ‰, 2014-05-21 at 11:52 +0300, Mika Westerberg wrote: > On Thu, May 15, 2014 at 02:44:14PM +0800, Zhang Rui wrote: > > For some ACPI device objects, they represent master devices, > > and their children devices are enumerated by bus controller drivers > > for the buses they are on. > > > > In this case, we do not want to enumerate their children devices to > > platform bus explicitly in acpi scan code. > > > > Thus a new flag .is_master_device is introduced in this patch. > > > > For devices with this flag set, we will not do default enumeration > > for their children. > > Is there any particular reason we would like to enumerate everything > below the first device by default? we do not enumerate everything below the first device by default, we just enumerate all the devices with _HID. But if a device has _HID and it is enumerated by its parents to a separate bus, we need this flag set for its parent. thanks, rui