Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[linux-2.6-omap-h63xx.git] / drivers / usb / core / usb.c

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index be1fa0723f2c662a058040e8878e7ffb5c12c3df..dcfc072630c11fb8c6d8126c5ce433112b693ad2 100644 (file)
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -253,7 +253,7 @@ static int usb_dev_prepare(struct device *dev)
 static void usb_dev_complete(struct device *dev)
 {
        /* Currently used only for rebinding interfaces */
-       usb_resume(dev);        /* Implement eventually? */
+       usb_resume(dev, PMSG_RESUME);   /* Message event is meaningless */
 }
 
 static int usb_dev_suspend(struct device *dev)
@@ -263,7 +263,7 @@ static int usb_dev_suspend(struct device *dev)
 
 static int usb_dev_resume(struct device *dev)
 {
-       return usb_resume(dev);
+       return usb_resume(dev, PMSG_RESUME);
 }
 
 static int usb_dev_freeze(struct device *dev)
@@ -273,7 +273,7 @@ static int usb_dev_freeze(struct device *dev)
 
 static int usb_dev_thaw(struct device *dev)
 {
-       return usb_resume(dev);
+       return usb_resume(dev, PMSG_THAW);
 }
 
 static int usb_dev_poweroff(struct device *dev)
@@ -283,10 +283,10 @@ static int usb_dev_poweroff(struct device *dev)
 
 static int usb_dev_restore(struct device *dev)
 {
-       return usb_resume(dev);
+       return usb_resume(dev, PMSG_RESTORE);
 }
 
-static struct pm_ops usb_device_pm_ops = {
+static struct dev_pm_ops usb_device_pm_ops = {
        .prepare =      usb_dev_prepare,
        .complete =     usb_dev_complete,
        .suspend =      usb_dev_suspend,
@@ -301,7 +301,7 @@ static struct pm_ops usb_device_pm_ops = {
 
 #define ksuspend_usb_init()    0
 #define ksuspend_usb_cleanup() do {} while (0)
-#define usb_device_pm_ops      (*(struct pm_ops *)0)
+#define usb_device_pm_ops      (*(struct dev_pm_ops *)0)
 
 #endif /* CONFIG_PM */
 
@@ -362,7 +362,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
        dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;
        dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT;
        /* ep0 maxpacket comes later, from device descriptor */
-       usb_enable_endpoint(dev, &dev->ep0);
+       usb_enable_endpoint(dev, &dev->ep0, true);
        dev->can_submit = 1;
 
        /* Save readable and stable topology id, distinguishing devices
@@ -402,6 +402,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
 #ifdef CONFIG_PM
        mutex_init(&dev->pm_mutex);
        INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
+       INIT_WORK(&dev->autoresume, usb_autoresume_work);
        dev->autosuspend_delay = usb_autosuspend_delay * HZ;
        dev->connect_time = jiffies;
        dev->active_duration = -jiffies;
@@ -513,10 +514,7 @@ EXPORT_SYMBOL_GPL(usb_put_intf);
  * disconnect; in some drivers (such as usb-storage) the disconnect()
  * or suspend() method will block waiting for a device reset to complete.
  *
- * Returns a negative error code for failure, otherwise 1 or 0 to indicate
- * that the device will or will not have to be unlocked.  (0 can be
- * returned when an interface is given and is BINDING, because in that
- * case the driver already owns the device lock.)
+ * Returns a negative error code for failure, otherwise 0.
  */
 int usb_lock_device_for_reset(struct usb_device *udev,
                              const struct usb_interface *iface)
@@ -527,16 +525,9 @@ int usb_lock_device_for_reset(struct usb_device *udev,
                return -ENODEV;
        if (udev->state == USB_STATE_SUSPENDED)
                return -EHOSTUNREACH;
-       if (iface) {
-               switch (iface->condition) {
-               case USB_INTERFACE_BINDING:
-                       return 0;
-               case USB_INTERFACE_BOUND:
-                       break;
-               default:
-                       return -EINTR;
-               }
-       }
+       if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+                       iface->condition == USB_INTERFACE_UNBOUND))
+               return -EINTR;
 
        while (usb_trylock_device(udev) != 0) {
 
@@ -550,10 +541,11 @@ int usb_lock_device_for_reset(struct usb_device *udev,
                        return -ENODEV;
                if (udev->state == USB_STATE_SUSPENDED)
                        return -EHOSTUNREACH;
-               if (iface && iface->condition != USB_INTERFACE_BOUND)
+               if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+                               iface->condition == USB_INTERFACE_UNBOUND))
                        return -EINTR;
        }
-       return 1;
+       return 0;
 }
 EXPORT_SYMBOL_GPL(usb_lock_device_for_reset);
 
@@ -962,8 +954,12 @@ void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in,
 }
 EXPORT_SYMBOL_GPL(usb_buffer_unmap_sg);
 
-/* format to disable USB on kernel command line is: nousb */
-__module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
+/* To disable USB, kernel command line is 'nousb' not 'usbcore.nousb' */
+#ifdef MODULE
+module_param(nousb, bool, 0444);
+#else
+core_param(nousb, nousb, bool, 0444);
+#endif
 
 /*
  * for external read access to <nousb>
@@ -974,6 +970,37 @@ int usb_disabled(void)
 }
 EXPORT_SYMBOL_GPL(usb_disabled);
 
+/*
+ * Notifications of device and interface registration
+ */
+static int usb_bus_notify(struct notifier_block *nb, unsigned long action,
+               void *data)
+{
+       struct device *dev = data;
+
+       switch (action) {
+       case BUS_NOTIFY_ADD_DEVICE:
+               if (dev->type == &usb_device_type)
+                       (void) usb_create_sysfs_dev_files(to_usb_device(dev));
+               else if (dev->type == &usb_if_device_type)
+                       (void) usb_create_sysfs_intf_files(
+                                       to_usb_interface(dev));
+               break;
+
+       case BUS_NOTIFY_DEL_DEVICE:
+               if (dev->type == &usb_device_type)
+                       usb_remove_sysfs_dev_files(to_usb_device(dev));
+               else if (dev->type == &usb_if_device_type)
+                       usb_remove_sysfs_intf_files(to_usb_interface(dev));
+               break;
+       }
+       return 0;
+}
+
+static struct notifier_block usb_bus_nb = {
+       .notifier_call = usb_bus_notify,
+};
+
 /*
  * Init
  */
@@ -991,6 +1018,9 @@ static int __init usb_init(void)
        retval = bus_register(&usb_bus_type);
        if (retval)
                goto bus_register_failed;
+       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;
@@ -1025,6 +1055,8 @@ driver_register_failed:
 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);
 bus_register_failed:
        ksuspend_usb_cleanup();
@@ -1048,6 +1080,7 @@ static void __exit usb_exit(void)
        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();
 }