Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752912AbaARCrr (ORCPT ); Fri, 17 Jan 2014 21:47:47 -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 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,677,1384329600"; d="scan'208";a="460784090" 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-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/