1 files changed, 61 insertions, 15 deletions

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 927a27dd2f8..a26f73880c3 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -34,6 +34,7 @@
 #include <linux/usb.h>
 #include <linux/mutex.h>
 #include <linux/workqueue.h>
+#include <linux/debugfs.h>
 
 #include <asm/io.h>
 #include <linux/scatterlist.h>
@@ -139,8 +140,7 @@ static int __find_interface(struct device *dev, void *data)
         struct find_interface_arg *arg = data;
         struct usb_interface *intf;
 
-        /* can't look at usb devices, only interfaces */
-        if (is_usb_device(dev))
+        if (!is_usb_interface(dev))
                 return 0;
 
         intf = to_usb_interface(dev);
@@ -184,11 +184,16 @@ EXPORT_SYMBOL_GPL(usb_find_interface);
 static void usb_release_dev(struct device *dev)
 {
         struct usb_device *udev;
+        struct usb_hcd *hcd;
 
         udev = to_usb_device(dev);
+        hcd = bus_to_hcd(udev->bus);
 
         usb_destroy_configuration(udev);
-        usb_put_hcd(bus_to_hcd(udev->bus));
+        /* Root hubs aren't real devices, so don't free HCD resources */
+        if (hcd->driver->free_dev && udev->parent)
+                hcd->driver->free_dev(hcd, udev);
+        usb_put_hcd(hcd);
         kfree(udev->product);
         kfree(udev->manufacturer);
         kfree(udev->serial);
@@ -359,6 +364,13 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
                 kfree(dev);
                 return NULL;
         }
+        /* Root hubs aren't true devices, so don't allocate HCD resources */
+        if (usb_hcd->driver->alloc_dev && parent &&
+                !usb_hcd->driver->alloc_dev(usb_hcd, dev)) {
+                usb_put_hcd(bus_to_hcd(bus));
+                kfree(dev);
+                return NULL;
+        }
 
         device_initialize(&dev->dev);
         dev->dev.bus = &usb_bus_type;
@@ -386,18 +398,24 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
          */
         if (unlikely(!parent)) {
                 dev->devpath[0] = '0';
+                dev->route = 0;
 
                 dev->dev.parent = bus->controller;
                 dev_set_name(&dev->dev, "usb%d", bus->busnum);
                 root_hub = 1;
         } else {
                 /* match any labeling on the hubs; it's one-based */
-                if (parent->devpath[0] == '0')
+                if (parent->devpath[0] == '0') {
                         snprintf(dev->devpath, sizeof dev->devpath,
                                 "%d", port1);
-                else
+                        /* Root ports are not counted in route string */
+                        dev->route = 0;
+                } else {
                         snprintf(dev->devpath, sizeof dev->devpath,
                                 "%s.%d", parent->devpath, port1);
+                        dev->route = parent->route +
+                                (port1 << ((parent->level - 1)*4));
+                }
 
                 dev->dev.parent = &parent->dev;
                 dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath);
@@ -810,12 +828,12 @@ void usb_buffer_dmasync(struct urb *urb)
                 return;
 
         if (controller->dma_mask) {
-                dma_sync_single(controller,
+                dma_sync_single_for_cpu(controller,
                         urb->transfer_dma, urb->transfer_buffer_length,
                         usb_pipein(urb->pipe)
                                 ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
                 if (usb_pipecontrol(urb->pipe))
-                        dma_sync_single(controller,
+                        dma_sync_single_for_cpu(controller,
                                         urb->setup_dma,
                                         sizeof(struct usb_ctrlrequest),
                                         DMA_TO_DEVICE);
@@ -933,8 +951,8 @@ void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in,
                         || !controller->dma_mask)
                 return;
 
-        dma_sync_sg(controller, sg, n_hw_ents,
-                        is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+        dma_sync_sg_for_cpu(controller, sg, n_hw_ents,
+                            is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
 }
 EXPORT_SYMBOL_GPL(usb_buffer_dmasync_sg);
 #endif
@@ -1012,6 +1030,35 @@ static struct notifier_block usb_bus_nb = {
         .notifier_call = usb_bus_notify,
 };
 
+struct dentry *usb_debug_root;
+EXPORT_SYMBOL_GPL(usb_debug_root);
+
+struct dentry *usb_debug_devices;
+
+static int usb_debugfs_init(void)
+{
+        usb_debug_root = debugfs_create_dir("usb", NULL);
+        if (!usb_debug_root)
+                return -ENOENT;
+
+        usb_debug_devices = debugfs_create_file("devices", 0444,
+                                                usb_debug_root, NULL,
+                                                &usbfs_devices_fops);
+        if (!usb_debug_devices) {
+                debugfs_remove(usb_debug_root);
+                usb_debug_root = NULL;
+                return -ENOENT;
+        }
+
+        return 0;
+}
+
+static void usb_debugfs_cleanup(void)
+{
+        debugfs_remove(usb_debug_devices);
+        debugfs_remove(usb_debug_root);
+}
+
 /*
  * Init
  */
@@ -1023,6 +1070,10 @@ static int __init usb_init(void)
                 return 0;
         }
 
+        retval = usb_debugfs_init();
+        if (retval)
+                goto out;
+
         retval = ksuspend_usb_init();
         if (retval)
                 goto out;
@@ -1032,9 +1083,6 @@ static int __init usb_init(void)
         retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
         if (retval)
                 goto bus_notifier_failed;
-        retval = usb_host_init();
-        if (retval)
-                goto host_init_failed;
         retval = usb_major_init();
         if (retval)
                 goto major_init_failed;
@@ -1064,8 +1112,6 @@ usb_devio_init_failed:
 driver_register_failed:
         usb_major_cleanup();
 major_init_failed:
-        usb_host_cleanup();
-host_init_failed:
         bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
 bus_notifier_failed:
         bus_unregister(&usb_bus_type);
@@ -1090,10 +1136,10 @@ static void __exit usb_exit(void)
         usb_deregister(&usbfs_driver);
         usb_devio_cleanup();
         usb_hub_cleanup();
-        usb_host_cleanup();
         bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
         bus_unregister(&usb_bus_type);
         ksuspend_usb_cleanup();
+        usb_debugfs_cleanup();
 }
 
 subsys_initcall(usb_init);