USB: Move runtime PM callbacks to usb_device_pm_ops

USB defines usb_device_type pointing to usb_device_pm_ops that
provides system-wide PM callbacks only and usb_bus_type pointing to
usb_bus_pm_ops that provides runtime PM callbacks only.  However,
the USB runtime PM callbacks may be defined in usb_device_pm_ops
which makes it possible to drop usb_bus_pm_ops and will allow us
to consolidate the handling of subsystems by the PM core code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/driver.c

@@ -1646,7 +1646,7 @@ static int autosuspend_check(struct usb_device *udev)
 	return 0;
 }
 
-static int usb_runtime_suspend(struct device *dev)
+int usb_runtime_suspend(struct device *dev)
 {
 	struct usb_device	*udev = to_usb_device(dev);
 	int			status;
@@ -1667,7 +1667,7 @@ static int usb_runtime_suspend(struct device *dev)
 	return status;
 }
 
-static int usb_runtime_resume(struct device *dev)
+int usb_runtime_resume(struct device *dev)
 {
 	struct usb_device	*udev = to_usb_device(dev);
 	int			status;
@@ -1679,7 +1679,7 @@ static int usb_runtime_resume(struct device *dev)
 	return status;
 }
 
-static int usb_runtime_idle(struct device *dev)
+int usb_runtime_idle(struct device *dev)
 {
 	struct usb_device	*udev = to_usb_device(dev);
 
@@ -1691,19 +1691,10 @@ static int usb_runtime_idle(struct device *dev)
 	return 0;
 }
 
-static const struct dev_pm_ops usb_bus_pm_ops = {
-	.runtime_suspend =	usb_runtime_suspend,
-	.runtime_resume =	usb_runtime_resume,
-	.runtime_idle =		usb_runtime_idle,
-};
-
 #endif /* CONFIG_USB_SUSPEND */
 
 struct bus_type usb_bus_type = {
 	.name =		"usb",
 	.match =	usb_device_match,
 	.uevent =	usb_uevent,
-#ifdef CONFIG_USB_SUSPEND
-	.pm =		&usb_bus_pm_ops,
-#endif
 };

drivers/usb/core/usb.c

@@ -315,6 +315,11 @@ static const struct dev_pm_ops usb_device_pm_ops = {
 	.thaw =		usb_dev_thaw,
 	.poweroff =	usb_dev_poweroff,
 	.restore =	usb_dev_restore,
+#ifdef CONFIG_USB_SUSPEND
+	.runtime_suspend =	usb_runtime_suspend,
+	.runtime_resume =	usb_runtime_resume,
+	.runtime_idle =		usb_runtime_idle,
+#endif
 };
 
 #endif	/* CONFIG_PM */

drivers/usb/core/usb.h

@@ -77,6 +77,9 @@ static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
 extern void usb_autosuspend_device(struct usb_device *udev);
 extern int usb_autoresume_device(struct usb_device *udev);
 extern int usb_remote_wakeup(struct usb_device *dev);
+extern int usb_runtime_suspend(struct device *dev);
+extern int usb_runtime_resume(struct device *dev);
+extern int usb_runtime_idle(struct device *dev);
 
 #else