1 #include <linux/pci.h> 2 #include <linux/module.h> 3 #include "pci.h" 4 5 static void pci_free_resources(struct pci_dev *dev) 6 { 7 int i; 8 9 msi_remove_pci_irq_vectors(dev); 10 11 pci_cleanup_rom(dev); 12 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 13 struct resource *res = dev->resource + i; 14 if (res->parent) 15 release_resource(res); 16 } 17 } 18 19 static void pci_destroy_dev(struct pci_dev *dev) 20 { 21 if (!list_empty(&dev->global_list)) { 22 pci_proc_detach_device(dev); 23 pci_remove_sysfs_dev_files(dev); 24 device_unregister(&dev->dev); 25 spin_lock(&pci_bus_lock); 26 list_del(&dev->global_list); 27 dev->global_list.next = dev->global_list.prev = NULL; 28 spin_unlock(&pci_bus_lock); 29 } 30 31 /* Remove the device from the device lists, and prevent any further 32 * list accesses from this device */ 33 spin_lock(&pci_bus_lock); 34 list_del(&dev->bus_list); 35 dev->bus_list.next = dev->bus_list.prev = NULL; 36 spin_unlock(&pci_bus_lock); 37 38 pci_free_resources(dev); 39 pci_dev_put(dev); 40 } 41 42 /** 43 * pci_remove_device_safe - remove an unused hotplug device 44 * @dev: the device to remove 45 * 46 * Delete the device structure from the device lists and 47 * notify userspace (/sbin/hotplug), but only if the device 48 * in question is not being used by a driver. 49 * Returns 0 on success. 50 */ 51 int pci_remove_device_safe(struct pci_dev *dev) 52 { 53 if (pci_dev_driver(dev)) 54 return -EBUSY; 55 pci_destroy_dev(dev); 56 return 0; 57 } 58 EXPORT_SYMBOL(pci_remove_device_safe); 59 60 void pci_remove_bus(struct pci_bus *pci_bus) 61 { 62 pci_proc_detach_bus(pci_bus); 63 64 spin_lock(&pci_bus_lock); 65 list_del(&pci_bus->node); 66 spin_unlock(&pci_bus_lock); 67 pci_remove_legacy_files(pci_bus); 68 class_device_remove_file(&pci_bus->class_dev, 69 &class_device_attr_cpuaffinity); 70 sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge"); 71 class_device_unregister(&pci_bus->class_dev); 72 } 73 EXPORT_SYMBOL(pci_remove_bus); 74 75 /** 76 * pci_remove_bus_device - remove a PCI device and any children 77 * @dev: the device to remove 78 * 79 * Remove a PCI device from the device lists, informing the drivers 80 * that the device has been removed. We also remove any subordinate 81 * buses and children in a depth-first manner. 82 * 83 * For each device we remove, delete the device structure from the 84 * device lists, remove the /proc entry, and notify userspace 85 * (/sbin/hotplug). 86 */ 87 void pci_remove_bus_device(struct pci_dev *dev) 88 { 89 if (dev->subordinate) { 90 struct pci_bus *b = dev->subordinate; 91 92 pci_remove_behind_bridge(dev); 93 pci_remove_bus(b); 94 dev->subordinate = NULL; 95 } 96 97 pci_destroy_dev(dev); 98 } 99 100 /** 101 * pci_remove_behind_bridge - remove all devices behind a PCI bridge 102 * @dev: PCI bridge device 103 * 104 * Remove all devices on the bus, except for the parent bridge. 105 * This also removes any child buses, and any devices they may 106 * contain in a depth-first manner. 107 */ 108 void pci_remove_behind_bridge(struct pci_dev *dev) 109 { 110 struct list_head *l, *n; 111 112 if (dev->subordinate) { 113 list_for_each_safe(l, n, &dev->subordinate->devices) { 114 struct pci_dev *dev = pci_dev_b(l); 115 116 pci_remove_bus_device(dev); 117 } 118 } 119 } 120 121 EXPORT_SYMBOL(pci_remove_bus_device); 122 EXPORT_SYMBOL(pci_remove_behind_bridge); 123