From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 v10 05/11] PCI: make PCI device create/destroy logic symmetric Date: Mon, 21 Jan 2013 13:20:46 -0800 Message-Id: <1358803252-20639-6-git-send-email-yinghai@kernel.org> In-Reply-To: <1358803252-20639-1-git-send-email-yinghai@kernel.org> References: <1358803252-20639-1-git-send-email-yinghai@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 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) -- 1.7.10.4