From patchwork Tue Oct 30 17:42:38 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 195572 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 9B3602C0097 for ; Wed, 31 Oct 2012 04:43:28 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965067Ab2J3RnW (ORCPT ); Tue, 30 Oct 2012 13:43:22 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:26159 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964822Ab2J3RnT (ORCPT ); Tue, 30 Oct 2012 13:43:19 -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 q9UHh184021479 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 30 Oct 2012 17:43:02 GMT Received: from acsmt356.oracle.com (acsmt356.oracle.com [141.146.40.156]) by ucsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id q9UHh1wd006354 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 30 Oct 2012 17:43:01 GMT Received: from abhmt119.oracle.com (abhmt119.oracle.com [141.146.116.71]) by acsmt356.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id q9UHh0Ax002189; Tue, 30 Oct 2012 12:43:00 -0500 Received: from linux-siqj.site (/10.132.126.191) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 30 Oct 2012 10:43:00 -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 1/8] PCI: Separate out pci_assign_unassigned_bus_resources() Date: Tue, 30 Oct 2012 10:42:38 -0700 Message-Id: <1351618965-16761-2-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1351618965-16761-1-git-send-email-yinghai@kernel.org> References: <20121030040237.GA10472@google.com> <1351618965-16761-1-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 is main portion of pci_rescan_bus(). Separate it out and prepare to use it for pci root bus hot add later. Signed-off-by: Yinghai Lu --- drivers/pci/setup-bus.c | 32 ++++++++++++++++++-------------- include/linux/pci.h | 1 + 2 files changed, 19 insertions(+), 14 deletions(-) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 1e808ca..1f34929 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -1550,25 +1550,12 @@ enable_all: } EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); -#ifdef CONFIG_HOTPLUG -/** - * pci_rescan_bus - scan a PCI bus for devices. - * @bus: PCI bus to scan - * - * Scan a PCI bus and child buses for new devices, adds them, - * and enables them. - * - * Returns the max number of subordinate bus discovered. - */ -unsigned int __ref pci_rescan_bus(struct pci_bus *bus) +void pci_assign_unassigned_bus_resources(struct pci_bus *bus) { - unsigned int max; struct pci_dev *dev; LIST_HEAD(add_list); /* list of resources that want additional resources */ - max = pci_scan_child_bus(bus); - down_read(&pci_bus_sem); list_for_each_entry(dev, &bus->devices, bus_list) if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || @@ -1581,6 +1568,23 @@ unsigned int __ref pci_rescan_bus(struct pci_bus *bus) BUG_ON(!list_empty(&add_list)); pci_enable_bridges(bus); +} +#ifdef CONFIG_HOTPLUG +/** + * pci_rescan_bus - scan a PCI bus for devices. + * @bus: PCI bus to scan + * + * Scan a PCI bus and child buses for new devices, adds them, + * and enables them. + * + * Returns the max number of subordinate bus discovered. + */ +unsigned int __ref pci_rescan_bus(struct pci_bus *bus) +{ + unsigned int max; + + max = pci_scan_child_bus(bus); + pci_assign_unassigned_bus_resources(bus); pci_bus_add_devices(bus); return max; diff --git a/include/linux/pci.h b/include/linux/pci.h index be1de01..505c05a 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -980,6 +980,7 @@ void pci_bus_size_bridges(struct pci_bus *bus); int pci_claim_resource(struct pci_dev *, int); void pci_assign_unassigned_resources(void); void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge); +void pci_assign_unassigned_bus_resources(struct pci_bus *bus); void pdev_enable_device(struct pci_dev *); int pci_enable_resources(struct pci_dev *, int mask); void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),