2 #include <linux/module.h>
3 #include <linux/pci-aspm.h>
6 static void pci_free_resources(struct pci_dev
*dev
)
10 msi_remove_pci_irq_vectors(dev
);
13 for (i
= 0; i
< PCI_NUM_RESOURCES
; i
++) {
14 struct resource
*res
= dev
->resource
+ i
;
16 release_resource(res
);
20 static void pci_stop_dev(struct pci_dev
*dev
)
22 pci_pme_active(dev
, false);
25 pci_proc_detach_device(dev
);
26 pci_remove_sysfs_dev_files(dev
);
27 device_release_driver(&dev
->dev
);
32 pcie_aspm_exit_link_state(dev
);
35 static void pci_destroy_dev(struct pci_dev
*dev
)
37 device_del(&dev
->dev
);
39 down_write(&pci_bus_sem
);
40 list_del(&dev
->bus_list
);
41 up_write(&pci_bus_sem
);
43 pci_free_resources(dev
);
44 put_device(&dev
->dev
);
47 void pci_remove_bus(struct pci_bus
*bus
)
49 pci_proc_detach_bus(bus
);
51 down_write(&pci_bus_sem
);
53 pci_bus_release_busn_res(bus
);
54 up_write(&pci_bus_sem
);
55 pci_remove_legacy_files(bus
);
56 pcibios_remove_bus(bus
);
57 device_unregister(&bus
->dev
);
59 EXPORT_SYMBOL(pci_remove_bus
);
61 static void pci_stop_bus_device(struct pci_dev
*dev
)
63 struct pci_bus
*bus
= dev
->subordinate
;
64 struct pci_dev
*child
, *tmp
;
67 * Stopping an SR-IOV PF device removes all the associated VFs,
68 * which will update the bus->devices list and confuse the
69 * iterator. Therefore, iterate in reverse so we remove the VFs
73 list_for_each_entry_safe_reverse(child
, tmp
,
74 &bus
->devices
, bus_list
)
75 pci_stop_bus_device(child
);
81 static void pci_remove_bus_device(struct pci_dev
*dev
)
83 struct pci_bus
*bus
= dev
->subordinate
;
84 struct pci_dev
*child
, *tmp
;
87 list_for_each_entry_safe(child
, tmp
,
88 &bus
->devices
, bus_list
)
89 pci_remove_bus_device(child
);
92 dev
->subordinate
= NULL
;
99 * pci_stop_and_remove_bus_device - remove a PCI device and any children
100 * @dev: the device to remove
102 * Remove a PCI device from the device lists, informing the drivers
103 * that the device has been removed. We also remove any subordinate
104 * buses and children in a depth-first manner.
106 * For each device we remove, delete the device structure from the
107 * device lists, remove the /proc entry, and notify userspace
110 void pci_stop_and_remove_bus_device(struct pci_dev
*dev
)
112 pci_stop_bus_device(dev
);
113 pci_remove_bus_device(dev
);
115 EXPORT_SYMBOL(pci_stop_and_remove_bus_device
);
117 void pci_stop_root_bus(struct pci_bus
*bus
)
119 struct pci_dev
*child
, *tmp
;
120 struct pci_host_bridge
*host_bridge
;
122 if (!pci_is_root_bus(bus
))
125 host_bridge
= to_pci_host_bridge(bus
->bridge
);
126 list_for_each_entry_safe_reverse(child
, tmp
,
127 &bus
->devices
, bus_list
)
128 pci_stop_bus_device(child
);
130 /* stop the host bridge */
131 device_del(&host_bridge
->dev
);
134 void pci_remove_root_bus(struct pci_bus
*bus
)
136 struct pci_dev
*child
, *tmp
;
137 struct pci_host_bridge
*host_bridge
;
139 if (!pci_is_root_bus(bus
))
142 host_bridge
= to_pci_host_bridge(bus
->bridge
);
143 list_for_each_entry_safe(child
, tmp
,
144 &bus
->devices
, bus_list
)
145 pci_remove_bus_device(child
);
147 host_bridge
->bus
= NULL
;
149 /* remove the host bridge */
150 put_device(&host_bridge
->dev
);