8a1bc9013a
This lets us check if the device is really added to the driver core or not, which is what we need when walking some of the bus lists. The flag is there in anticipation of getting rid of the other PCI device list, which is what we used to check in this situation. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
#include <linux/pci.h>
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#include <linux/module.h>
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#include "pci.h"
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static void pci_free_resources(struct pci_dev *dev)
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{
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int i;
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msi_remove_pci_irq_vectors(dev);
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pci_cleanup_rom(dev);
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for (i = 0; i < PCI_NUM_RESOURCES; i++) {
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struct resource *res = dev->resource + i;
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if (res->parent)
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release_resource(res);
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}
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}
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static void pci_stop_dev(struct pci_dev *dev)
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{
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if (dev->is_added) {
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pci_proc_detach_device(dev);
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pci_remove_sysfs_dev_files(dev);
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device_unregister(&dev->dev);
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dev->is_added = 0;
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down_write(&pci_bus_sem);
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list_del(&dev->global_list);
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dev->global_list.next = dev->global_list.prev = NULL;
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up_write(&pci_bus_sem);
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}
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}
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static void pci_destroy_dev(struct pci_dev *dev)
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{
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pci_stop_dev(dev);
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/* Remove the device from the device lists, and prevent any further
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* list accesses from this device */
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down_write(&pci_bus_sem);
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list_del(&dev->bus_list);
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dev->bus_list.next = dev->bus_list.prev = NULL;
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up_write(&pci_bus_sem);
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pci_free_resources(dev);
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pci_dev_put(dev);
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}
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/**
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* pci_remove_device_safe - remove an unused hotplug device
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* @dev: the device to remove
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*
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* Delete the device structure from the device lists and
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* notify userspace (/sbin/hotplug), but only if the device
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* in question is not being used by a driver.
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* Returns 0 on success.
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*/
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#if 0
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int pci_remove_device_safe(struct pci_dev *dev)
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{
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if (pci_dev_driver(dev))
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return -EBUSY;
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pci_destroy_dev(dev);
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return 0;
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}
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#endif /* 0 */
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void pci_remove_bus(struct pci_bus *pci_bus)
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{
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pci_proc_detach_bus(pci_bus);
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down_write(&pci_bus_sem);
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list_del(&pci_bus->node);
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up_write(&pci_bus_sem);
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pci_remove_legacy_files(pci_bus);
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device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
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device_unregister(&pci_bus->dev);
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}
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EXPORT_SYMBOL(pci_remove_bus);
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/**
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* pci_remove_bus_device - remove a PCI device and any children
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* @dev: the device to remove
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*
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* Remove a PCI device from the device lists, informing the drivers
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* that the device has been removed. We also remove any subordinate
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* buses and children in a depth-first manner.
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*
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* For each device we remove, delete the device structure from the
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* device lists, remove the /proc entry, and notify userspace
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* (/sbin/hotplug).
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*/
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void pci_remove_bus_device(struct pci_dev *dev)
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{
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if (dev->subordinate) {
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struct pci_bus *b = dev->subordinate;
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pci_remove_behind_bridge(dev);
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pci_remove_bus(b);
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dev->subordinate = NULL;
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}
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pci_destroy_dev(dev);
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}
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/**
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* pci_remove_behind_bridge - remove all devices behind a PCI bridge
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* @dev: PCI bridge device
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*
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* Remove all devices on the bus, except for the parent bridge.
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* This also removes any child buses, and any devices they may
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* contain in a depth-first manner.
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*/
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void pci_remove_behind_bridge(struct pci_dev *dev)
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{
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struct list_head *l, *n;
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if (dev->subordinate) {
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list_for_each_safe(l, n, &dev->subordinate->devices) {
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struct pci_dev *dev = pci_dev_b(l);
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pci_remove_bus_device(dev);
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}
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}
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}
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static void pci_stop_bus_devices(struct pci_bus *bus)
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{
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struct list_head *l, *n;
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list_for_each_safe(l, n, &bus->devices) {
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struct pci_dev *dev = pci_dev_b(l);
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pci_stop_bus_device(dev);
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}
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}
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/**
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* pci_stop_bus_device - stop a PCI device and any children
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* @dev: the device to stop
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*
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* Stop a PCI device (detach the driver, remove from the global list
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* and so on). This also stop any subordinate buses and children in a
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* depth-first manner.
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*/
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void pci_stop_bus_device(struct pci_dev *dev)
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{
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if (dev->subordinate)
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pci_stop_bus_devices(dev->subordinate);
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pci_stop_dev(dev);
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}
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EXPORT_SYMBOL(pci_remove_bus_device);
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EXPORT_SYMBOL(pci_remove_behind_bridge);
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EXPORT_SYMBOL_GPL(pci_stop_bus_device);
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