From patchwork Sat Jun 18 02:24:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 9185315 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 06857601C0 for ; Sat, 18 Jun 2016 02:25:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E0C2B27D85 for ; Sat, 18 Jun 2016 02:25:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D501127DA4; Sat, 18 Jun 2016 02:25:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7DCBE27EED for ; Sat, 18 Jun 2016 02:25:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753440AbcFRCZj (ORCPT ); Fri, 17 Jun 2016 22:25:39 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:45131 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751134AbcFRCZh (ORCPT ); Fri, 17 Jun 2016 22:25:37 -0400 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u5I2PKhf005603 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 18 Jun 2016 02:25:20 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u5I2PKBF031692 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 18 Jun 2016 02:25:20 GMT Received: from abhmp0014.oracle.com (abhmp0014.oracle.com [141.146.116.20]) by aserv0122.oracle.com (8.13.8/8.13.8) with ESMTP id u5I2PK9I030809; Sat, 18 Jun 2016 02:25:20 GMT Received: from userv0022.oracle.com (/10.132.126.127) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 17 Jun 2016 19:25:19 -0700 From: Yinghai Lu To: Bjorn Helgaas , David Miller , Benjamin Herrenschmidt , Linus Torvalds Cc: Wei Yang , Khalid Aziz , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH v13 05/16] PCI: Add pci_find_bus_resource() Date: Fri, 17 Jun 2016 19:24:50 -0700 Message-Id: <20160618022501.15648-6-yinghai@kernel.org> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20160618022501.15648-1-yinghai@kernel.org> References: <20160618022501.15648-1-yinghai@kernel.org> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 c8b4dbd..81c6cf9 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -414,18 +414,9 @@ 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; @@ -455,6 +446,20 @@ 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 9c201d4..8214b24 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -805,6 +805,8 @@ 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);