From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andres Salomon Subject: Re: [PATCH] ACPI: don't attempt to use hest_tab unless !acpi_pci_disabled Date: Sat, 15 Jan 2011 12:32:33 -0800 Message-ID: <20110115123233.2727f871@queued.net> References: <20110114181620.188e7a62@queued.net> <20110114235437.669f820d@queued.net> <201101151401.18846.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from LUNGE.MIT.EDU ([18.54.1.69]:42639 "EHLO lunge.queued.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753793Ab1AOUci (ORCPT ); Sat, 15 Jan 2011 15:32:38 -0500 In-Reply-To: <201101151401.18846.rjw@sisk.pl> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: Len Brown , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Huang Ying , Jesse Barnes On Sat, 15 Jan 2011 14:01:18 +0100 "Rafael J. Wysocki" wrote: > On Saturday, January 15, 2011, Andres Salomon wrote: > > On Fri, 14 Jan 2011 23:24:27 -0500 (EST) > > Len Brown wrote: > > > > [...] > > > > This patch causes apei_hest_parse to check both hest_disabled > > > > and acpi_pci_disabled before continuing. With it, the XO-1 > > > > boots properly. > > > > > > The X0-1 has no ACPI support, and thus you are running > > > with acpi_disabled=1, yes? > > > > The XO-1 has no ACPI support, but ACPI support is enabled in the > > kernel (as the XO-1.5 does have ACPI support, and the same kernel > > is used between both) and I'm not passing any arguments to the > > kernel regarding it. The kernel's ACPI code detects that it's not > > there and disables it (the kernel message that's seen is "ACPI: > > Interpreter disabled.") > > > > This is what sets apci_pci_disabled to 1; I'm not doing it manually. > > Hmm. Does the appended patch help instead? Nope. acpi_hest_init returns immediately if acpi_disabled, and thus never sets hest_disable. You either need to set hest_disable, or ensure apei_hest_parse checks more than just hest_disable. > > Rafael > > --- > drivers/acpi/pci_root.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > Index: linux-2.6/drivers/acpi/pci_root.c > =================================================================== > --- linux-2.6.orig/drivers/acpi/pci_root.c > +++ linux-2.6/drivers/acpi/pci_root.c > @@ -631,11 +631,11 @@ static int acpi_pci_root_remove(struct a > > static int __init acpi_pci_root_init(void) > { > + acpi_hest_init(); > + > if (acpi_pci_disabled) > return 0; > > - acpi_hest_init(); > - > pci_acpi_crs_quirks(); > if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) > return -ENODEV;