From patchwork Fri Jan 26 15:02:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 866384 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zShxG3T1Cz9s8J for ; Sat, 27 Jan 2018 02:03:30 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753448AbeAZPD0 (ORCPT ); Fri, 26 Jan 2018 10:03:26 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42726 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752954AbeAZPDY (ORCPT ); Fri, 26 Jan 2018 10:03:24 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0A35BD1FFF; Fri, 26 Jan 2018 15:03:24 +0000 (UTC) Received: from dhcp-44-202.space.revspace.nl.com (ovpn-117-96.ams2.redhat.com [10.36.117.96]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5226B5D960; Fri, 26 Jan 2018 15:03:20 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , Len Brown , Robert Moore , Erik Schmauss , Bjorn Helgaas Cc: Hans de Goede , linux-acpi@vger.kernel.org, devel@acpica.org, linux-pci@vger.kernel.org Subject: [PATCH v3 4/5] ACPI / scan: Use acpi_bus_get_status for initial status of ACPI_TYPE_DEVICE devs Date: Fri, 26 Jan 2018 16:02:59 +0100 Message-Id: <20180126150300.9691-4-hdegoede@redhat.com> In-Reply-To: <20180126150300.9691-1-hdegoede@redhat.com> References: <20180126150300.9691-1-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 Jan 2018 15:03:24 +0000 (UTC) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The acpi_get_bus_status wrapper for acpi_bus_get_status_handle has some code to handle certain device quirks, in some cases we also need this quirk handling for the initial _STA call. Specifically on some devices calling _STA before all _DEP dependencies are met results in errors like these: [ 0.123579] ACPI Error: No handler for Region [ECRM] (00000000ba9edc4c) [GenericSerialBus] (20170831/evregion-166) [ 0.123601] ACPI Error: Region GenericSerialBus (ID=9) has no handler (20170831/exfldio-299) [ 0.123618] ACPI Error: Method parse/execution failed \_SB.I2C1.BAT1._STA, AE_NOT_EXIST (20170831/psparse-550) acpi_get_bus_status already has code to avoid this, so by using it we also silence these errors from the initial _STA call. Note that in order for the acpi_get_bus_status handling for this to work, we initialize dep_unmet to 1 until acpi_device_dep_initialize gets called, this means that battery devices will be instantiated with an initial status of 0. This is not a problem, acpi_bus_attach will get called soon after the instantiation anyways and it will update the status as first point of order. Signed-off-by: Hans de Goede --- Note if we were to: 1) move the acpi_bus_init_power call from acpi_bus_get_power_flags to acpi_bus_attach, which already calls acpi_bus_init_power for uninitialized devices; and 2) move the acpi_bus_get_wakeup_device_flags call from acpi_add_single_object to acpi_bus_attach. This one is tricky, because acpi_device_add checks wakeup.flags.valid which gets set by this. And the acpi_wakeup_gpe_init call actually is the troublesome one because it uses acpi_match_device_ids which relies on the status... Then we can entirely rely on the acpi_bus_get_status call in acpi_bus_attach and remove the acpi_bus_get_status call from the device-instantiation path. --- drivers/acpi/scan.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index b0fe5272c76a..4c1b90e91271 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1565,6 +1565,8 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, device_initialize(&device->dev); dev_set_uevent_suppress(&device->dev, true); acpi_init_coherency(device); + /* Assume there are unmet deps until acpi_device_dep_initialize runs */ + device->dep_unmet = 1; } void acpi_device_add_finalize(struct acpi_device *device) @@ -1588,6 +1590,14 @@ static int acpi_add_single_object(struct acpi_device **child, } acpi_init_device_object(device, handle, type, sta); + /* + * For ACPI_BUS_TYPE_DEVICE getting the status is delayed till here so + * that we can call acpi_bus_get_status and use its quirk handling. + * Note this must be done before the get power-/wakeup_dev-flags calls. + */ + if (type == ACPI_BUS_TYPE_DEVICE) + acpi_bus_get_status(device); + acpi_bus_get_power_flags(device); acpi_bus_get_wakeup_device_flags(device); @@ -1660,9 +1670,11 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type, return -ENODEV; *type = ACPI_BUS_TYPE_DEVICE; - status = acpi_bus_get_status_handle(handle, sta); - if (ACPI_FAILURE(status)) - *sta = 0; + /* + * acpi_add_single_object updates this once we've an acpi_device + * so that acpi_bus_get_status' quirk handling can be used. + */ + *sta = 0; break; case ACPI_TYPE_PROCESSOR: *type = ACPI_BUS_TYPE_PROCESSOR; @@ -1760,6 +1772,8 @@ static void acpi_device_dep_initialize(struct acpi_device *adev) acpi_status status; int i; + adev->dep_unmet = 0; + if (!acpi_has_method(adev->handle, "_DEP")) return;