[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/pci/remove.c b/ap/os/linux/linux-3.4.x/drivers/pci/remove.c
new file mode 100644
index 0000000..eae55c7
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/pci/remove.c
@@ -0,0 +1,184 @@
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/pci-aspm.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_stop_dev(struct pci_dev *dev)
+{
+ pci_pme_active(dev, false);
+
+ if (dev->is_added) {
+ pci_proc_detach_device(dev);
+ pci_remove_sysfs_dev_files(dev);
+ device_unregister(&dev->dev);
+ dev->is_added = 0;
+ }
+
+ if (dev->bus->self)
+ pcie_aspm_exit_link_state(dev);
+}
+
+static void pci_destroy_dev(struct pci_dev *dev)
+{
+ /* Remove the device from the device lists, and prevent any further
+ * list accesses from this device */
+ down_write(&pci_bus_sem);
+ list_del(&dev->bus_list);
+ dev->bus_list.next = dev->bus_list.prev = NULL;
+ up_write(&pci_bus_sem);
+
+ 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.
+ */
+#if 0
+int pci_remove_device_safe(struct pci_dev *dev)
+{
+ if (pci_dev_driver(dev))
+ return -EBUSY;
+ pci_destroy_dev(dev);
+ return 0;
+}
+#endif /* 0 */
+
+void pci_remove_bus(struct pci_bus *pci_bus)
+{
+ pci_proc_detach_bus(pci_bus);
+
+ down_write(&pci_bus_sem);
+ list_del(&pci_bus->node);
+ up_write(&pci_bus_sem);
+ if (!pci_bus->is_added)
+ return;
+
+ pci_remove_legacy_files(pci_bus);
+ device_unregister(&pci_bus->dev);
+}
+EXPORT_SYMBOL(pci_remove_bus);
+
+static void __pci_remove_behind_bridge(struct pci_dev *dev);
+/**
+ * pci_stop_and_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);
+}
+EXPORT_SYMBOL(__pci_remove_bus_device);
+
+void pci_stop_and_remove_bus_device(struct pci_dev *dev)
+{
+ pci_stop_bus_device(dev);
+ __pci_remove_bus_device(dev);
+}
+
+static 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)
+ __pci_remove_bus_device(pci_dev_b(l));
+}
+
+static void pci_stop_behind_bridge(struct pci_dev *dev)
+{
+ struct list_head *l, *n;
+
+ if (dev->subordinate)
+ list_for_each_safe(l, n, &dev->subordinate->devices)
+ pci_stop_bus_device(pci_dev_b(l));
+}
+
+/**
+ * pci_stop_and_remove_behind_bridge - stop and 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_stop_and_remove_behind_bridge(struct pci_dev *dev)
+{
+ pci_stop_behind_bridge(dev);
+ __pci_remove_behind_bridge(dev);
+}
+
+static void pci_stop_bus_devices(struct pci_bus *bus)
+{
+ struct list_head *l, *n;
+
+ /*
+ * VFs could be removed by pci_stop_and_remove_bus_device() in the
+ * pci_stop_bus_devices() code path for PF.
+ * aka, bus->devices get updated in the process.
+ * but VFs are inserted after PFs when SRIOV is enabled for PF,
+ * We can iterate the list backwards to get prev valid PF instead
+ * of removed VF.
+ */
+ list_for_each_prev_safe(l, n, &bus->devices) {
+ struct pci_dev *dev = pci_dev_b(l);
+ pci_stop_bus_device(dev);
+ }
+}
+
+/**
+ * pci_stop_bus_device - stop a PCI device and any children
+ * @dev: the device to stop
+ *
+ * Stop a PCI device (detach the driver, remove from the global list
+ * and so on). This also stop any subordinate buses and children in a
+ * depth-first manner.
+ */
+void pci_stop_bus_device(struct pci_dev *dev)
+{
+ if (dev->subordinate)
+ pci_stop_bus_devices(dev->subordinate);
+
+ pci_stop_dev(dev);
+}
+
+EXPORT_SYMBOL(pci_stop_and_remove_bus_device);
+EXPORT_SYMBOL(pci_stop_and_remove_behind_bridge);
+EXPORT_SYMBOL_GPL(pci_stop_bus_device);