From patchwork Thu Sep 27 08:11:56 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 187305 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 8BB1E2C0099 for ; Thu, 27 Sep 2012 18:12:27 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755674Ab2I0IM0 (ORCPT ); Thu, 27 Sep 2012 04:12:26 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:27421 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755522Ab2I0IMX (ORCPT ); Thu, 27 Sep 2012 04:12:23 -0400 Received: from ucsinet21.oracle.com (ucsinet21.oracle.com [156.151.31.93]) by acsinet15.oracle.com (Sentrion-MTA-4.2.2/Sentrion-MTA-4.2.2) with ESMTP id q8R8CDEn001786 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 27 Sep 2012 08:12:14 GMT Received: from acsmt358.oracle.com (acsmt358.oracle.com [141.146.40.158]) by ucsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id q8R8CCnH012342 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 27 Sep 2012 08:12:13 GMT Received: from abhmt114.oracle.com (abhmt114.oracle.com [141.146.116.66]) by acsmt358.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id q8R8CC7E002882; Thu, 27 Sep 2012 03:12:12 -0500 Received: from linux-siqj.site (/75.36.244.250) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 27 Sep 2012 01:12:11 -0700 From: Yinghai Lu To: Bjorn Helgaas , Len Brown , Taku Izumi , Jiang Liu Cc: linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu Subject: [PATCH 5/8] PCI: Add pci_stop_and_remove_root_bus() Date: Thu, 27 Sep 2012 01:11:56 -0700 Message-Id: <1348733519-24684-6-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1348733519-24684-1-git-send-email-yinghai@kernel.org> References: <1348733519-24684-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org It supports both pci root bus and pci bus under pci bridge. -v2: clear pci_bridge's subordinate. -v3: only handle root bus. and also put Jiang's get/put pair in -v4: fold pci_stop/remove_bus_devices in... reducing confusing. -v5: split device_register/unregister to avoid extra get... also remove extra blank line. Signed-off-by: Yinghai Lu --- drivers/pci/remove.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/pci.h | 2 ++ 2 files changed, 38 insertions(+), 0 deletions(-) diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 513972f..7c0fd92 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -111,3 +111,39 @@ void pci_stop_and_remove_bus_device(struct pci_dev *dev) pci_remove_bus_device(dev); } EXPORT_SYMBOL(pci_stop_and_remove_bus_device); + +void pci_stop_root_bus(struct pci_bus *bus) +{ + struct pci_dev *child, *tmp; + struct pci_host_bridge *host_bridge; + + if (!pci_is_root_bus(bus)) + return; + + host_bridge = to_pci_host_bridge(bus->bridge); + list_for_each_entry_safe_reverse(child, tmp, + &bus->devices, bus_list) + pci_stop_bus_device(child); + + /* stop the host bridge */ + device_del(&host_bridge->dev); +} + +void pci_remove_root_bus(struct pci_bus *bus) +{ + struct pci_dev *child, *tmp; + struct pci_host_bridge *host_bridge; + + if (!pci_is_root_bus(bus)) + return; + + host_bridge = to_pci_host_bridge(bus->bridge); + list_for_each_entry_safe(child, tmp, + &bus->devices, bus_list) + pci_remove_bus_device(child); + pci_remove_bus(bus); + host_bridge->bus = NULL; + + /* remove the host bridge */ + put_device(&host_bridge->dev); +} diff --git a/include/linux/pci.h b/include/linux/pci.h index 505c05a..a5cd03b 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -734,6 +734,8 @@ extern struct pci_dev *pci_dev_get(struct pci_dev *dev); extern void pci_dev_put(struct pci_dev *dev); extern void pci_remove_bus(struct pci_bus *b); extern void pci_stop_and_remove_bus_device(struct pci_dev *dev); +void pci_stop_root_bus(struct pci_bus *bus); +void pci_remove_root_bus(struct pci_bus *bus); void pci_setup_cardbus(struct pci_bus *bus); extern void pci_sort_breadthfirst(void); #define dev_is_pci(d) ((d)->bus == &pci_bus_type)