From patchwork Sat Jan 18 02:48:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 3507851 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id F01859F169 for ; Sat, 18 Jan 2014 02:48:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 30209201B4 for ; Sat, 18 Jan 2014 02:48:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 43E5620165 for ; Sat, 18 Jan 2014 02:48:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752100AbaARCrp (ORCPT ); Fri, 17 Jan 2014 21:47:45 -0500 Received: from mga02.intel.com ([134.134.136.20]:51359 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752026AbaARCro (ORCPT ); Fri, 17 Jan 2014 21:47:44 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 17 Jan 2014 18:47:43 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,677,1384329600"; d="scan'208";a="460784090" Received: from gerry-dev.bj.intel.com ([10.238.158.74]) by fmsmga001.fm.intel.com with ESMTP; 17 Jan 2014 18:47:40 -0800 From: Jiang Liu To: "Rafael J . Wysocki" , Bjorn Helgaas , Toshi Kani , Yinghai Lu , Yijing Wang , Len Brown , "Rafael J. Wysocki" , Robert Moore , Lv Zheng Cc: Jiang Liu , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, devel@acpica.org Subject: [Patch v1 1/3] ACPI: add callback prepare() into acpi_hotplug_handler Date: Sat, 18 Jan 2014 10:48:15 +0800 Message-Id: <1390013297-23462-1-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add callback prepare() into acpi_hotplug_handler, which will get called at the very beginning of ACPI hotplug event handler. The ACPI core will ignore the event if prepare() returns NOTIFY_STOP. Signed-off-by: Jiang Liu --- drivers/acpi/scan.c | 4 ++++ include/acpi/acpi_bus.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index fd39459..6b0f419 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -392,6 +392,10 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) struct acpi_device *adev; acpi_status status; + if (handler->prepare && + handler->prepare(handle, type, data) == NOTIFY_STOP) + return; + if (!handler->hotplug.enabled) return acpi_hotplug_unsupported(handle, type); diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index ddabed1..09a73bd 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -113,6 +113,7 @@ static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile( struct acpi_scan_handler { const struct acpi_device_id *ids; struct list_head list_node; + int (*prepare)(acpi_handle handle, u32 type, void *context); int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id); void (*detach)(struct acpi_device *dev); struct acpi_hotplug_profile hotplug;