From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Westerberg Subject: Re: [PATCH V7 08/11] ACPI: always register memory hotplug scan handler even if CONFIG_X86_INTEL_LPSS is cleared Date: Mon, 26 May 2014 14:52:35 +0300 Message-ID: <20140526115235.GD1765@lahna.fi.intel.com> References: <1400781753-2682-1-git-send-email-rui.zhang@intel.com> <1400781753-2682-9-git-send-email-rui.zhang@intel.com> <20140526105636.GC1765@lahna.fi.intel.com> <4177604.8JWRhYqtaS@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga09.intel.com ([134.134.136.24]:48370 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751537AbaEZLwl (ORCPT ); Mon, 26 May 2014 07:52:41 -0400 Content-Disposition: inline In-Reply-To: <4177604.8JWRhYqtaS@vostro.rjw.lan> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" 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 On Mon, May 26, 2014 at 01:53:39PM +0200, Rafael J. Wysocki wrote: > > I'm wondering whether it is worth the ugliness to get platform bus > > enumeration the default? > > > > Since you already have the PNP whitelist, can't we just use that for PNP > > and keep these files as they are? In other words, don't make any kind of > > physical device by default and let the scan handlers to decide. > > Well, that's tempting, but then we'd get one more whitelist pretty much without > any benefit, because we'd be still going to have the list in acpi_platform.c. > > The purpose of the whole exercise is not to prevent PNP devices from being > created by default (which admittedly is a nice side effect), but to get rid > of the white list in acpi_platform.c - and in particular, to avoid the > necessity to add every ACPI-enumerated platform device to that list in the > future. Yes, I understand but that list currently has only 5 entries. Are we expecting to have much more entries there in the future? For LPSS devices we can't get rid of the list since we need to pass ->driver_data based on the _HID anyway.