1 files changed, 118 insertions, 0 deletions

diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
new file mode 100644
index 000000000000..96f077f9a659
--- /dev/null
+++ b/drivers/pci/remove.c
@@ -0,0 +1,118 @@
+#include <linux/pci.h>
+#include <linux/module.h>
+#include "pci.h"
+
+static void pci_free_resources(struct pci_dev *dev)
+{
+        int i;
+
+        msi_remove_pci_irq_vectors(dev);
+
+        pci_cleanup_rom(dev);
+        for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+                struct resource *res = dev->resource + i;
+                if (res->parent)
+                        release_resource(res);
+        }
+}
+
+static void pci_destroy_dev(struct pci_dev *dev)
+{
+        pci_proc_detach_device(dev);
+        pci_remove_sysfs_dev_files(dev);
+        device_unregister(&dev->dev);
+
+        /* Remove the device from the device lists, and prevent any further
+         * list accesses from this device */
+        spin_lock(&pci_bus_lock);
+        list_del(&dev->bus_list);
+        list_del(&dev->global_list);
+        dev->bus_list.next = dev->bus_list.prev = NULL;
+        dev->global_list.next = dev->global_list.prev = NULL;
+        spin_unlock(&pci_bus_lock);
+
+        pci_free_resources(dev);
+        pci_dev_put(dev);
+}
+
+/**
+ * pci_remove_device_safe - remove an unused hotplug device
+ * @dev: the device to remove
+ *
+ * Delete the device structure from the device lists and 
+ * notify userspace (/sbin/hotplug), but only if the device
+ * in question is not being used by a driver.
+ * Returns 0 on success.
+ */
+int pci_remove_device_safe(struct pci_dev *dev)
+{
+        if (pci_dev_driver(dev))
+                return -EBUSY;
+        pci_destroy_dev(dev);
+        return 0;
+}
+EXPORT_SYMBOL(pci_remove_device_safe);
+
+void pci_remove_bus(struct pci_bus *pci_bus)
+{
+        pci_proc_detach_bus(pci_bus);
+
+        spin_lock(&pci_bus_lock);
+        list_del(&pci_bus->node);
+        spin_unlock(&pci_bus_lock);
+        pci_remove_legacy_files(pci_bus);
+        class_device_remove_file(&pci_bus->class_dev,
+                &class_device_attr_cpuaffinity);
+        sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge");
+        class_device_unregister(&pci_bus->class_dev);
+}
+EXPORT_SYMBOL(pci_remove_bus);
+
+/**
+ * pci_remove_bus_device - remove a PCI device and any children
+ * @dev: the device to remove
+ *
+ * Remove a PCI device from the device lists, informing the drivers
+ * that the device has been removed.  We also remove any subordinate
+ * buses and children in a depth-first manner.
+ *
+ * For each device we remove, delete the device structure from the
+ * device lists, remove the /proc entry, and notify userspace
+ * (/sbin/hotplug).
+ */
+void pci_remove_bus_device(struct pci_dev *dev)
+{
+        if (dev->subordinate) {
+                struct pci_bus *b = dev->subordinate;
+
+                pci_remove_behind_bridge(dev);
+                pci_remove_bus(b);
+                dev->subordinate = NULL;
+        }
+
+        pci_destroy_dev(dev);
+}
+
+/**
+ * pci_remove_behind_bridge - remove all devices behind a PCI bridge
+ * @dev: PCI bridge device
+ *
+ * Remove all devices on the bus, except for the parent bridge.
+ * This also removes any child buses, and any devices they may
+ * contain in a depth-first manner.
+ */
+void pci_remove_behind_bridge(struct pci_dev *dev)
+{
+        struct list_head *l, *n;
+
+        if (dev->subordinate) {
+                list_for_each_safe(l, n, &dev->subordinate->devices) {
+                        struct pci_dev *dev = pci_dev_b(l);
+
+                        pci_remove_bus_device(dev);
+                }
+        }
+}
+
+EXPORT_SYMBOL(pci_remove_bus_device);
+EXPORT_SYMBOL(pci_remove_behind_bridge);