From patchwork Fri Jun 29 14:51:19 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Toshi Kani X-Patchwork-Id: 1132291 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 48776DFF34 for ; Fri, 29 Jun 2012 14:55:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755383Ab2F2OzO (ORCPT ); Fri, 29 Jun 2012 10:55:14 -0400 Received: from g4t0015.houston.hp.com ([15.201.24.18]:11118 "EHLO g4t0015.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755548Ab2F2OzO (ORCPT ); Fri, 29 Jun 2012 10:55:14 -0400 Received: from g4t0009.houston.hp.com (g4t0009.houston.hp.com [16.234.32.26]) by g4t0015.houston.hp.com (Postfix) with ESMTP id A0315864F; Fri, 29 Jun 2012 14:55:11 +0000 (UTC) Received: from misato.fc.hp.com (misato.fc.hp.com [16.71.12.41]) by g4t0009.houston.hp.com (Postfix) with ESMTP id 467DCC59B; Fri, 29 Jun 2012 14:55:11 +0000 (UTC) From: Toshi Kani To: lenb@kernel.org, linux-acpi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Toshi Kani Subject: [PATCH] ACPI: Add ACPI CPU hot-remove support Date: Fri, 29 Jun 2012 08:51:19 -0600 Message-Id: <1340981479-6521-1-git-send-email-toshi.kani@hp.com> X-Mailer: git-send-email 1.7.7.6 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Added CPU hot-remove support through an ACPI eject notification. It calls acpi_bus_hot_remove_device(), which shares the same code path with the sysfs eject operation. acpi_os_hotplug_execute() serializes hot-remove operations between ACPI hot-remove and sysfs eject requests. Signed-off-by: Toshi Kani Reviewed-by: Yasuaki Ishimatsu --- This patch applies on top of the patchset below. [PATCH v6 0/6] ACPI: Add _OST support for ACPI hotplug http://marc.info/?l=linux-acpi&m=134074381322973&w=2 --- drivers/acpi/processor_driver.c | 27 +++++++++++++++++---------- 1 files changed, 17 insertions(+), 10 deletions(-) diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index f9fa1b2..a6f6bde 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -699,8 +699,8 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) static void acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) { - struct acpi_processor *pr; struct acpi_device *device = NULL; + struct acpi_eject_event *ej_event = NULL; u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ int result; @@ -732,20 +732,27 @@ static void acpi_processor_hotplug_notify(acpi_handle handle, "received ACPI_NOTIFY_EJECT_REQUEST\n")); if (acpi_bus_get_device(handle, &device)) { - printk(KERN_ERR PREFIX - "Device don't exist, dropping EJECT\n"); + pr_err(PREFIX "Device don't exist, dropping EJECT\n"); break; } - pr = acpi_driver_data(device); - if (!pr) { - printk(KERN_ERR PREFIX - "Driver data is NULL, dropping EJECT\n"); + if (!acpi_driver_data(device)) { + pr_err(PREFIX "Driver data is NULL, dropping EJECT\n"); break; } - /* REVISIT: update when eject is supported */ - ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; - break; + ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); + if (!ej_event) { + pr_err(PREFIX "No memory, dropping EJECT\n"); + break; + } + + ej_event->handle = handle; + ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; + acpi_os_hotplug_execute(acpi_bus_hot_remove_device, + (void *)ej_event); + + /* eject is performed asynchronously */ + return; default: ACPI_DEBUG_PRINT((ACPI_DB_INFO,