From patchwork Fri Apr 21 05:04:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 753123 X-Patchwork-Delegate: bhelgaas@google.com 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 3w8Nwl3KM7z9s75 for ; Fri, 21 Apr 2017 15:05:43 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1035251AbdDUFFl (ORCPT ); Fri, 21 Apr 2017 01:05:41 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:37761 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1035221AbdDUFFk (ORCPT ); Fri, 21 Apr 2017 01:05:40 -0400 Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v3L55TB0019865 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Apr 2017 05:05:30 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v3L55TWr011744 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Apr 2017 05:05:29 GMT Received: from abhmp0014.oracle.com (abhmp0014.oracle.com [141.146.116.20]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v3L55Tt1016044; Fri, 21 Apr 2017 05:05:29 GMT Received: from dhcp-whq-twvpn-3-vpnpool-10-159-248-209.vpn.oracle.com (/69.181.250.163) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 20 Apr 2017 22:05:29 -0700 From: Yinghai Lu To: Bjorn Helgaas , David Miller , Benjamin Herrenschmidt Cc: Wei Yang , Khalid Aziz , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH 02/13] PCI: Add pci_find_bus_resource() Date: Thu, 20 Apr 2017 22:04:49 -0700 Message-Id: <20170421050500.13957-3-yinghai@kernel.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170421050500.13957-1-yinghai@kernel.org> References: <20170421050500.13957-1-yinghai@kernel.org> X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add pci_find_bus_resource() to return bus resource for input resource. In some case, we may only have bus instead of dev. It is same as pci_find_parent_resource, but take bus as input. Signed-off-by: Yinghai Lu --- drivers/pci/pci.c | 27 ++++++++++++++++----------- include/linux/pci.h | 2 ++ 2 files changed, 18 insertions(+), 11 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 4ffa152..deb828f 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -437,18 +437,9 @@ int pci_find_ht_capability(struct pci_dev *dev, int ht_cap) } EXPORT_SYMBOL_GPL(pci_find_ht_capability); -/** - * pci_find_parent_resource - return resource region of parent bus of given region - * @dev: PCI device structure contains resources to be searched - * @res: child resource record for which parent is sought - * - * For given resource region of given device, return the resource - * region of parent bus the given region is contained in. - */ -struct resource *pci_find_parent_resource(const struct pci_dev *dev, - struct resource *res) +struct resource *pci_find_bus_resource(const struct pci_bus *bus, + struct resource *res) { - const struct pci_bus *bus = dev->bus; struct resource *r; int i; @@ -478,6 +469,20 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev, } return NULL; } + +/** + * pci_find_parent_resource - return resource region of parent bus of given region + * @dev: PCI device structure contains resources to be searched + * @res: child resource record for which parent is sought + * + * For given resource region of given device, return the resource + * region of parent bus the given region is contained in. + */ +struct resource *pci_find_parent_resource(const struct pci_dev *dev, + struct resource *res) +{ + return pci_find_bus_resource(dev->bus, res); +} EXPORT_SYMBOL(pci_find_parent_resource); /** diff --git a/include/linux/pci.h b/include/linux/pci.h index 88185ff..817786b 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -836,6 +836,8 @@ void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region, struct resource *res); void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res, struct pci_bus_region *region); +struct resource *pci_find_bus_resource(const struct pci_bus *bus, + struct resource *res); void pcibios_scan_specific_bus(int busn); struct pci_bus *pci_find_bus(int domain, int busnr); void pci_bus_add_devices(const struct pci_bus *bus);