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 #if 0 52 int pci_remove_device_safe(struct pci_dev *dev) 53 { 54 if (pci_dev_driver(dev)) 55 return -EBUSY; 56 pci_destroy_dev(dev); 57 return 0; 58 } 59 #endif /* 0 */ 60 61 void pci_remove_bus(struct pci_bus *pci_bus) 62 { 63 pci_proc_detach_bus(pci_bus); 64 65 spin_lock(&pci_bus_lock); 66 list_del(&pci_bus->node); 67 spin_unlock(&pci_bus_lock); 68 pci_remove_legacy_files(pci_bus); 69 class_device_remove_file(&pci_bus->class_dev, 70 &class_device_attr_cpuaffinity); 71 sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge"); 72 class_device_unregister(&pci_bus->class_dev); 73 } 74 EXPORT_SYMBOL(pci_remove_bus); 75 76 /** 77 * pci_remove_bus_device - remove a PCI device and any children 78 * @dev: the device to remove 79 * 80 * Remove a PCI device from the device lists, informing the drivers 81 * that the device has been removed. We also remove any subordinate 82 * buses and children in a depth-first manner. 83 * 84 * For each device we remove, delete the device structure from the 85 * device lists, remove the /proc entry, and notify userspace 86 * (/sbin/hotplug). 87 */ 88 void pci_remove_bus_device(struct pci_dev *dev) 89 { 90 if (dev->subordinate) { 91 struct pci_bus *b = dev->subordinate; 92 93 pci_remove_behind_bridge(dev); 94 pci_remove_bus(b); 95 dev->subordinate = NULL; 96 } 97 98 pci_destroy_dev(dev); 99 } 100 101 /** 102 * pci_remove_behind_bridge - remove all devices behind a PCI bridge 103 * @dev: PCI bridge device 104 * 105 * Remove all devices on the bus, except for the parent bridge. 106 * This also removes any child buses, and any devices they may 107 * contain in a depth-first manner. 108 */ 109 void pci_remove_behind_bridge(struct pci_dev *dev) 110 { 111 struct list_head *l, *n; 112 113 if (dev->subordinate) { 114 list_for_each_safe(l, n, &dev->subordinate->devices) { 115 struct pci_dev *dev = pci_dev_b(l); 116 117 pci_remove_bus_device(dev); 118 } 119 } 120 } 121 122 EXPORT_SYMBOL(pci_remove_bus_device); 123 EXPORT_SYMBOL(pci_remove_behind_bridge); 124