From patchwork Fri Jan 18 07:53:16 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 2000031 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 69EE5DF280 for ; Fri, 18 Jan 2013 07:54:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751587Ab3ARHyq (ORCPT ); Fri, 18 Jan 2013 02:54:46 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:33899 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751324Ab3ARHxr (ORCPT ); Fri, 18 Jan 2013 02:53:47 -0500 Received: from ucsinet22.oracle.com (ucsinet22.oracle.com [156.151.31.94]) by userp1040.oracle.com (Sentrion-MTA-4.2.2/Sentrion-MTA-4.2.2) with ESMTP id r0I7rVp9011644 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 18 Jan 2013 07:53:31 GMT Received: from acsmt356.oracle.com (acsmt356.oracle.com [141.146.40.156]) by ucsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r0I7rUBf027751 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 18 Jan 2013 07:53:30 GMT Received: from abhmt116.oracle.com (abhmt116.oracle.com [141.146.116.68]) by acsmt356.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id r0I7rUQW008242; Fri, 18 Jan 2013 01:53:30 -0600 Received: from linux-siqj.site (/75.36.247.180) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 17 Jan 2013 23:53:30 -0800 From: Yinghai Lu To: Bjorn Helgaas , "Rafael J. Wysocki" , Len Brown , Taku Izumi , Jiang Liu Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH v9 05/11] PCI: make PCI device create/destroy logic symmetric Date: Thu, 17 Jan 2013 23:53:16 -0800 Message-Id: <1358495602-22867-6-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1358495602-22867-1-git-send-email-yinghai@kernel.org> References: <1358495602-22867-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Jiang Liu According to device model documentation, the way to create/destroy PCI devices should be symmetric. /** * device_del - delete device from system. * @dev: device. * * This is the first part of the device unregistration * sequence. This removes the device from the lists we control * from here, has it removed from the other driver model * subsystems it was added to in device_add(), and removes it * from the kobject hierarchy. * * NOTE: this should be called manually _iff_ device_add() was * also called manually. */ The rule is to either use 1) device_register()/device_unregister() or 2) device_initialize()/device_add()/device_del()/put_device(). So change PCI core logic to follow the rule and get rid of the redundant pci_dev_get()/pci_dev_put() pair. Signed-off-by: Jiang Liu Acked-by: Bjorn Helgaas Signed-by: Yinghai Lu Acked-by: Rafael J. Wysocki --- drivers/pci/probe.c | 1 - drivers/pci/remove.c | 4 ++-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index dcef3b9..9588207 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1298,7 +1298,6 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { device_initialize(&dev->dev); dev->dev.release = pci_release_dev; - pci_dev_get(dev); set_dev_node(&dev->dev, pcibus_to_node(bus)); dev->dev.dma_mask = &dev->dma_mask; diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 7c0fd92..fc38c48 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -22,7 +22,7 @@ static void pci_stop_dev(struct pci_dev *dev) if (dev->is_added) { pci_proc_detach_device(dev); pci_remove_sysfs_dev_files(dev); - device_unregister(&dev->dev); + device_del(&dev->dev); dev->is_added = 0; } @@ -37,7 +37,7 @@ static void pci_destroy_dev(struct pci_dev *dev) up_write(&pci_bus_sem); pci_free_resources(dev); - pci_dev_put(dev); + put_device(&dev->dev); } void pci_remove_bus(struct pci_bus *bus)