ia64/linux-2.6.18-xen.hg

view drivers/pci/remove.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 #include <linux/pci.h>
2 #include <linux/module.h>
3 #include "pci.h"
5 static void pci_free_resources(struct pci_dev *dev)
6 {
7 int i;
9 msi_remove_pci_irq_vectors(dev);
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 }
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 down_write(&pci_bus_sem);
26 list_del(&dev->global_list);
27 dev->global_list.next = dev->global_list.prev = NULL;
28 up_write(&pci_bus_sem);
29 }
31 /* Remove the device from the device lists, and prevent any further
32 * list accesses from this device */
33 down_write(&pci_bus_sem);
34 list_del(&dev->bus_list);
35 dev->bus_list.next = dev->bus_list.prev = NULL;
36 up_write(&pci_bus_sem);
38 pci_free_resources(dev);
39 pci_dev_put(dev);
40 }
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 */
61 void pci_remove_bus(struct pci_bus *pci_bus)
62 {
63 pci_proc_detach_bus(pci_bus);
65 down_write(&pci_bus_sem);
66 list_del(&pci_bus->node);
67 up_write(&pci_bus_sem);
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);
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;
93 pci_remove_behind_bridge(dev);
94 pci_remove_bus(b);
95 dev->subordinate = NULL;
96 }
98 pci_destroy_dev(dev);
99 }
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;
113 if (dev->subordinate) {
114 list_for_each_safe(l, n, &dev->subordinate->devices) {
115 struct pci_dev *dev = pci_dev_b(l);
117 pci_remove_bus_device(dev);
118 }
119 }
120 }
122 EXPORT_SYMBOL(pci_remove_bus_device);
123 EXPORT_SYMBOL(pci_remove_behind_bridge);