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