Rev 430 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 428 | giacomo | 1 | #include <linux/pci.h> |
| 2 | #include <linux/module.h> |
||
| 3 | #include "pci.h" |
||
| 4 | |||
| 5 | #undef DEBUG |
||
| 6 | |||
| 7 | #ifdef DEBUG |
||
| 8 | #define DBG(x...) printk(x) |
||
| 9 | #else |
||
| 10 | #define DBG(x...) |
||
| 11 | #endif |
||
| 12 | |||
| 13 | static void pci_free_resources(struct pci_dev *dev) |
||
| 14 | { |
||
| 15 | int i; |
||
| 16 | |||
| 17 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
||
| 18 | struct resource *res = dev->resource + i; |
||
| 19 | if (res->parent) |
||
| 20 | release_resource(res); |
||
| 21 | } |
||
| 22 | } |
||
| 23 | |||
| 24 | static void pci_destroy_dev(struct pci_dev *dev) |
||
| 25 | { |
||
| 26 | pci_proc_detach_device(dev); |
||
| 27 | device_unregister(&dev->dev); |
||
| 28 | |||
| 29 | /* Remove the device from the device lists, and prevent any further |
||
| 30 | * list accesses from this device */ |
||
| 31 | spin_lock(&pci_bus_lock); |
||
| 32 | list_del(&dev->bus_list); |
||
| 33 | list_del(&dev->global_list); |
||
| 34 | dev->bus_list.next = dev->bus_list.prev = NULL; |
||
| 35 | dev->global_list.next = dev->global_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 | /** |
||
| 61 | * pci_remove_bus_device - remove a PCI device and any children |
||
| 62 | * @dev: the device to remove |
||
| 63 | * |
||
| 64 | * Remove a PCI device from the device lists, informing the drivers |
||
| 65 | * that the device has been removed. We also remove any subordinate |
||
| 66 | * buses and children in a depth-first manner. |
||
| 67 | * |
||
| 68 | * For each device we remove, delete the device structure from the |
||
| 69 | * device lists, remove the /proc entry, and notify userspace |
||
| 70 | * (/sbin/hotplug). |
||
| 71 | */ |
||
| 72 | void pci_remove_bus_device(struct pci_dev *dev) |
||
| 73 | { |
||
| 74 | if (dev->subordinate) { |
||
| 75 | struct pci_bus *b = dev->subordinate; |
||
| 76 | |||
| 77 | pci_remove_behind_bridge(dev); |
||
| 78 | pci_proc_detach_bus(b); |
||
| 79 | |||
| 80 | spin_lock(&pci_bus_lock); |
||
| 81 | list_del(&b->node); |
||
| 82 | spin_unlock(&pci_bus_lock); |
||
| 83 | |||
| 84 | kfree(b); |
||
| 85 | dev->subordinate = NULL; |
||
| 86 | } |
||
| 87 | |||
| 88 | pci_destroy_dev(dev); |
||
| 89 | } |
||
| 90 | |||
| 91 | /** |
||
| 92 | * pci_remove_behind_bridge - remove all devices behind a PCI bridge |
||
| 93 | * @dev: PCI bridge device |
||
| 94 | * |
||
| 95 | * Remove all devices on the bus, except for the parent bridge. |
||
| 96 | * This also removes any child buses, and any devices they may |
||
| 97 | * contain in a depth-first manner. |
||
| 98 | */ |
||
| 99 | void pci_remove_behind_bridge(struct pci_dev *dev) |
||
| 100 | { |
||
| 101 | struct list_head *l, *n; |
||
| 102 | |||
| 103 | if (dev->subordinate) { |
||
| 104 | list_for_each_safe(l, n, &dev->subordinate->devices) { |
||
| 105 | struct pci_dev *dev = pci_dev_b(l); |
||
| 106 | |||
| 107 | pci_remove_bus_device(dev); |
||
| 108 | } |
||
| 109 | } |
||
| 110 | } |
||
| 111 | |||
| 112 | EXPORT_SYMBOL(pci_remove_bus_device); |
||
| 113 | EXPORT_SYMBOL(pci_remove_behind_bridge); |