From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752388AbaEUKxk (ORCPT ); Wed, 21 May 2014 06:53:40 -0400 Received: from v094114.home.net.pl ([79.96.170.134]:61280 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752358AbaEUKxh (ORCPT ); Wed, 21 May 2014 06:53:37 -0400 From: "Rafael J. Wysocki" To: Mika Westerberg Cc: Zhang Rui , 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 Subject: Re: [PATCH V6 09/11] ACPI: introduce flag .is_master_device Date: Wed, 21 May 2014 13:10:33 +0200 Message-ID: <2394524.GkgpdWbBbP@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/3.15.0-rc5+; KDE/4.11.5; x86_64; ; ) 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> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday, May 21, 2014 11:52:07 AM 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? Yes, there is. Device objects without _ADR under the PCI host bridge. Or we can skip the children under every *platform* device created by this by default and mark the ones where we want the children to be enumerated as platform devices too in a special way if needed. I guess we could try that (that was the Rui's original idea IIRC). Rafael