From patchwork Tue Apr 30 11:31:28 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gu Zheng X-Patchwork-Id: 240597 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 747AB2C00A1 for ; Tue, 30 Apr 2013 21:33:55 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760428Ab3D3Ldf (ORCPT ); Tue, 30 Apr 2013 07:33:35 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:23700 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1760372Ab3D3LdU (ORCPT ); Tue, 30 Apr 2013 07:33:20 -0400 X-IronPort-AV: E=Sophos;i="4.87,581,1363104000"; d="scan'208,223";a="7159408" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 30 Apr 2013 19:30:33 +0800 Received: from fnstmail02.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id r3UBXI0e029865; Tue, 30 Apr 2013 19:33:18 +0800 Received: from [10.167.233.218] ([10.167.233.218]) by fnstmail02.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2013043019313559-921402 ; Tue, 30 Apr 2013 19:31:35 +0800 Message-ID: <517FAB90.3030502@cn.fujitsu.com> Date: Tue, 30 Apr 2013 19:31:28 +0800 From: Gu Zheng User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 MIME-Version: 1.0 To: Bjorn Helgaas , Yinghai Lu CC: "linux-pci@vger.kernel.org" , Yasuaki Ishimatsu , Taku Izumi , Jiang Liu , tangchen , Lin Feng , linux-kernel , guz.fnst@cn.fujitsu.com Subject: [PATCH v2 3/4] PCI: Convert alloc_pci_dev(void) to pci_alloc_dev(bus) instead References: <516FB647.5030203@cn.fujitsu.com> In-Reply-To: X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/04/30 19:31:35, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/04/30 19:31:36, Serialize complete at 2013/04/30 19:31:36 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From 055d93b0e9a29f3786996f90b7893bd6eb4d244b Mon Sep 17 00:00:00 2001 From: Gu Zheng Date: Tue, 30 Apr 2013 17:23:31 +0900 Subject: [PATCH v2 3/4] PCI: Convert alloc_pci_dev(void) to pci_alloc_dev(bus) instead Use the new pci_alloc_dev(bus) to replace the existing using of alloc_pci_dev(void). And new functions pci_bus_get/put() are introdued to hide pci_bus' reference management. v2: Follow Bjorn's correction to move pci_bus_put() to pci_release_dev() instead. Signed-off-by: Gu Zheng --- arch/powerpc/kernel/pci_of_scan.c | 3 +-- arch/sparc/kernel/pci.c | 3 +-- drivers/char/agp/alpha-agp.c | 2 +- drivers/char/agp/parisc-agp.c | 2 +- drivers/pci/iov.c | 8 +++++--- drivers/pci/probe.c | 10 ++++------ drivers/scsi/megaraid.c | 2 +- 7 files changed, 14 insertions(+), 16 deletions(-) diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c index 2a67e9b..24d01c4 100644 --- a/arch/powerpc/kernel/pci_of_scan.c +++ b/arch/powerpc/kernel/pci_of_scan.c @@ -128,7 +128,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, const char *type; struct pci_slot *slot; - dev = alloc_pci_dev(); + dev = pci_alloc_dev(bus); if (!dev) return NULL; type = of_get_property(node, "device_type", NULL); @@ -137,7 +137,6 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, pr_debug(" create device, devfn: %x, type: %s\n", devfn, type); - dev->bus = bus; dev->dev.of_node = of_node_get(node); dev->dev.parent = bus->bridge; dev->dev.bus = &pci_bus_type; diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index baf4366..e5871fb 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -254,7 +254,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, const char *type; u32 class; - dev = alloc_pci_dev(); + dev = pci_alloc_dev(bus); if (!dev) return NULL; @@ -281,7 +281,6 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, printk(" create device, devfn: %x, type: %s\n", devfn, type); - dev->bus = bus; dev->sysdata = node; dev->dev.parent = bus->bridge; dev->dev.bus = &pci_bus_type; diff --git a/drivers/char/agp/alpha-agp.c b/drivers/char/agp/alpha-agp.c index dd84af4..199b8e9 100644 --- a/drivers/char/agp/alpha-agp.c +++ b/drivers/char/agp/alpha-agp.c @@ -174,7 +174,7 @@ alpha_core_agp_setup(void) /* * Build a fake pci_dev struct */ - pdev = alloc_pci_dev(); + pdev = pci_alloc_dev(NULL); if (!pdev) return -ENOMEM; pdev->vendor = 0xffff; diff --git a/drivers/char/agp/parisc-agp.c b/drivers/char/agp/parisc-agp.c index 94821ab..bf5d247 100644 --- a/drivers/char/agp/parisc-agp.c +++ b/drivers/char/agp/parisc-agp.c @@ -333,7 +333,7 @@ parisc_agp_setup(void __iomem *ioc_hpa, void __iomem *lba_hpa) struct agp_bridge_data *bridge; int error = 0; - fake_bridge_dev = alloc_pci_dev(); + fake_bridge_dev = pci_alloc_dev(NULL); if (!fake_bridge_dev) { error = -ENOMEM; goto fail; diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index ee599f2..24134cd 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -75,18 +75,20 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) struct pci_dev *virtfn; struct resource *res; struct pci_sriov *iov = dev->sriov; + struct pci_bus *bus; - virtfn = alloc_pci_dev(); + virtfn = pci_alloc_dev(NULL); if (!virtfn) return -ENOMEM; mutex_lock(&iov->dev->sriov->lock); - virtfn->bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id)); - if (!virtfn->bus) { + bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id)); + if (!bus) { kfree(virtfn); mutex_unlock(&iov->dev->sriov->lock); return -ENOMEM; } + virtfn->bus = pci_bus_get(bus); virtfn->devfn = virtfn_devfn(dev, id); virtfn->vendor = dev->vendor; pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device); diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 89db76a..32cf908 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1131,6 +1131,7 @@ static void pci_release_dev(struct device *dev) struct pci_dev *pci_dev; pci_dev = to_pci_dev(dev); + pci_bus_put(pci_dev->bus); pci_release_capabilities(pci_dev); pci_release_of_node(pci_dev); kfree(pci_dev); @@ -1211,10 +1212,8 @@ struct pci_dev *pci_alloc_dev(struct pci_bus *bus) INIT_LIST_HEAD(&dev->bus_list); - if (bus) { - get_device(&bus->dev); - dev->bus = bus; - } + if (bus) + dev->bus = pci_bus_get(bus); return dev; } @@ -1274,11 +1273,10 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000)) return NULL; - dev = alloc_pci_dev(); + dev = pci_alloc_dev(bus); if (!dev) return NULL; - dev->bus = bus; dev->devfn = devfn; dev->vendor = l & 0xffff; dev->device = (l >> 16) & 0xffff; diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c index 9504ec0..e1660ca 100644 --- a/drivers/scsi/megaraid.c +++ b/drivers/scsi/megaraid.c @@ -2025,7 +2025,7 @@ megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor) static inline int make_local_pdev(adapter_t *adapter, struct pci_dev **pdev) { - *pdev = alloc_pci_dev(); + *pdev = pci_alloc_dev(NULL); if( *pdev == NULL ) return -1;