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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 587 | giacomo | 1 | #include <linuxcomp.h> |
| 2 | |||
| 3 | #include <linux/pci.h> |
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| 4 | #include <linux/module.h> |
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| 5 | #include "pci.h" |
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| 6 | |||
| 7 | //#define DEBUG |
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| 8 | |||
| 9 | #ifdef DEBUG |
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| 10 | #define DBG(x...) printk(x) |
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| 11 | #else |
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| 12 | #define DBG(x...) |
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| 13 | #endif |
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| 14 | |||
| 15 | static void pci_free_resources(struct pci_dev *dev) |
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| 16 | { |
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| 17 | int i; |
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| 18 | |||
| 19 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
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| 20 | struct resource *res = dev->resource + i; |
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| 21 | if (res->parent) |
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| 22 | release_resource(res); |
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| 23 | } |
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| 24 | } |
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| 25 | |||
| 26 | static void pci_destroy_dev(struct pci_dev *dev) |
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| 27 | { |
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| 28 | pci_proc_detach_device(dev); |
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| 29 | device_unregister(&dev->dev); |
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| 30 | |||
| 31 | /* Remove the device from the device lists, and prevent any further |
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| 32 | * list accesses from this device */ |
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| 33 | spin_lock(&pci_bus_lock); |
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| 34 | list_del(&dev->bus_list); |
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| 35 | list_del(&dev->global_list); |
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| 36 | dev->bus_list.next = dev->bus_list.prev = NULL; |
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| 37 | dev->global_list.next = dev->global_list.prev = NULL; |
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| 38 | spin_unlock(&pci_bus_lock); |
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| 39 | |||
| 40 | pci_free_resources(dev); |
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| 41 | pci_dev_put(dev); |
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| 42 | } |
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| 43 | |||
| 44 | /** |
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| 45 | * pci_remove_device_safe - remove an unused hotplug device |
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| 46 | * @dev: the device to remove |
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| 47 | * |
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| 48 | * Delete the device structure from the device lists and |
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| 49 | * notify userspace (/sbin/hotplug), but only if the device |
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| 50 | * in question is not being used by a driver. |
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| 51 | * Returns 0 on success. |
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| 52 | */ |
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| 53 | int pci_remove_device_safe(struct pci_dev *dev) |
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| 54 | { |
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| 55 | if (pci_dev_driver(dev)) |
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| 56 | return -EBUSY; |
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| 57 | pci_destroy_dev(dev); |
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| 58 | return 0; |
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| 59 | } |
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| 60 | EXPORT_SYMBOL(pci_remove_device_safe); |
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| 61 | |||
| 62 | /** |
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| 63 | * pci_remove_bus_device - remove a PCI device and any children |
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| 64 | * @dev: the device to remove |
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| 65 | * |
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| 66 | * Remove a PCI device from the device lists, informing the drivers |
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| 67 | * that the device has been removed. We also remove any subordinate |
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| 68 | * buses and children in a depth-first manner. |
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| 69 | * |
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| 70 | * For each device we remove, delete the device structure from the |
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| 71 | * device lists, remove the /proc entry, and notify userspace |
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| 72 | * (/sbin/hotplug). |
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| 73 | */ |
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| 74 | void pci_remove_bus_device(struct pci_dev *dev) |
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| 75 | { |
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| 76 | if (dev->subordinate) { |
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| 77 | struct pci_bus *b = dev->subordinate; |
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| 78 | |||
| 79 | pci_remove_behind_bridge(dev); |
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| 80 | pci_proc_detach_bus(b); |
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| 81 | |||
| 82 | spin_lock(&pci_bus_lock); |
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| 83 | list_del(&b->node); |
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| 84 | spin_unlock(&pci_bus_lock); |
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| 85 | |||
| 86 | kfree(b); |
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| 87 | dev->subordinate = NULL; |
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| 88 | } |
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| 89 | |||
| 90 | pci_destroy_dev(dev); |
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| 91 | } |
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| 92 | |||
| 93 | /** |
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| 94 | * pci_remove_behind_bridge - remove all devices behind a PCI bridge |
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| 95 | * @dev: PCI bridge device |
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| 96 | * |
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| 97 | * Remove all devices on the bus, except for the parent bridge. |
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| 98 | * This also removes any child buses, and any devices they may |
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| 99 | * contain in a depth-first manner. |
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| 100 | */ |
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| 101 | void pci_remove_behind_bridge(struct pci_dev *dev) |
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| 102 | { |
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| 103 | struct list_head *l, *n; |
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| 104 | |||
| 105 | if (dev->subordinate) { |
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| 106 | list_for_each_safe(l, n, &dev->subordinate->devices) { |
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| 107 | struct pci_dev *dev = pci_dev_b(l); |
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| 108 | |||
| 109 | pci_remove_bus_device(dev); |
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| 110 | } |
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| 111 | } |
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| 112 | } |
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| 113 | |||
| 114 | EXPORT_SYMBOL(pci_remove_bus_device); |
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| 115 | EXPORT_SYMBOL(pci_remove_behind_bridge); |