USB: rearrange functions in driver.c

This patch (as1328) reorders the functions in drivers/usb/core/driver.c
so as to put all the routines dependent on CONFIG_PM in one place.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 057eeab..638d546 100644 (file)
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1413,6 +1413,109 @@ static int usb_resume_both(struct usb_device *udev, pm_message_t msg)
        return status;
 }
 
+/**
+ * usb_external_suspend_device - external suspend of a USB device and its interfaces
+ * @udev: the usb_device to suspend
+ * @msg: Power Management message describing this state transition
+ *
+ * This routine handles external suspend requests: ones not generated
+ * internally by a USB driver (autosuspend) but rather coming from the user
+ * (via sysfs) or the PM core (system sleep).  The suspend will be carried
+ * out regardless of @udev's usage counter or those of its interfaces,
+ * and regardless of whether or not remote wakeup is enabled.  Of course,
+ * interface drivers still have the option of failing the suspend (if
+ * there are unsuspended children, for example).
+ *
+ * The caller must hold @udev's device lock.
+ */
+int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
+{
+       int     status;
+
+       do_unbind_rebind(udev, DO_UNBIND);
+       usb_pm_lock(udev);
+       status = usb_suspend_both(udev, msg);
+       usb_pm_unlock(udev);
+       return status;
+}
+
+/**
+ * usb_external_resume_device - external resume of a USB device and its interfaces
+ * @udev: the usb_device to resume
+ * @msg: Power Management message describing this state transition
+ *
+ * This routine handles external resume requests: ones not generated
+ * internally by a USB driver (autoresume) but rather coming from the user
+ * (via sysfs), the PM core (system resume), or the device itself (remote
+ * wakeup).  @udev's usage counter is unaffected.
+ *
+ * The caller must hold @udev's device lock.
+ */
+int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
+{
+       int     status;
+
+       usb_pm_lock(udev);
+       status = usb_resume_both(udev, msg);
+       udev->last_busy = jiffies;
+       usb_pm_unlock(udev);
+       if (status == 0)
+               do_unbind_rebind(udev, DO_REBIND);
+
+       /* Now that the device is awake, we can start trying to autosuspend
+        * it again. */
+       if (status == 0)
+               usb_try_autosuspend_device(udev);
+       return status;
+}
+
+int usb_suspend(struct device *dev, pm_message_t msg)
+{
+       struct usb_device       *udev;
+
+       udev = to_usb_device(dev);
+
+       /* If udev is already suspended, we can skip this suspend and
+        * we should also skip the upcoming system resume.  High-speed
+        * root hubs are an exception; they need to resume whenever the
+        * system wakes up in order for USB-PERSIST port handover to work
+        * properly.
+        */
+       if (udev->state == USB_STATE_SUSPENDED) {
+               if (udev->parent || udev->speed != USB_SPEED_HIGH)
+                       udev->skip_sys_resume = 1;
+               return 0;
+       }
+
+       udev->skip_sys_resume = 0;
+       return usb_external_suspend_device(udev, msg);
+}
+
+int usb_resume(struct device *dev, pm_message_t msg)
+{
+       struct usb_device       *udev;
+       int                     status;
+
+       udev = to_usb_device(dev);
+
+       /* If udev->skip_sys_resume is set then udev was already suspended
+        * when the system sleep started, so we don't want to resume it
+        * during this system wakeup.
+        */
+       if (udev->skip_sys_resume)
+               return 0;
+       status = usb_external_resume_device(udev, msg);
+
+       /* Avoid PM error messages for devices disconnected while suspended
+        * as we'll display regular disconnect messages just a bit later.
+        */
+       if (status == -ENODEV)
+               return 0;
+       return status;
+}
+
+#endif /* CONFIG_PM */
+
 #ifdef CONFIG_USB_SUSPEND
 
 /**
@@ -1784,109 +1887,6 @@ void usb_autoresume_work(struct work_struct *work)
 
 #endif /* CONFIG_USB_SUSPEND */
 
-/**
- * usb_external_suspend_device - external suspend of a USB device and its interfaces
- * @udev: the usb_device to suspend
- * @msg: Power Management message describing this state transition
- *
- * This routine handles external suspend requests: ones not generated
- * internally by a USB driver (autosuspend) but rather coming from the user
- * (via sysfs) or the PM core (system sleep).  The suspend will be carried
- * out regardless of @udev's usage counter or those of its interfaces,
- * and regardless of whether or not remote wakeup is enabled.  Of course,
- * interface drivers still have the option of failing the suspend (if
- * there are unsuspended children, for example).
- *
- * The caller must hold @udev's device lock.
- */
-int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
-{
-       int     status;
-
-       do_unbind_rebind(udev, DO_UNBIND);
-       usb_pm_lock(udev);
-       status = usb_suspend_both(udev, msg);
-       usb_pm_unlock(udev);
-       return status;
-}
-
-/**
- * usb_external_resume_device - external resume of a USB device and its interfaces
- * @udev: the usb_device to resume
- * @msg: Power Management message describing this state transition
- *
- * This routine handles external resume requests: ones not generated
- * internally by a USB driver (autoresume) but rather coming from the user
- * (via sysfs), the PM core (system resume), or the device itself (remote
- * wakeup).  @udev's usage counter is unaffected.
- *
- * The caller must hold @udev's device lock.
- */
-int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
-{
-       int     status;
-
-       usb_pm_lock(udev);
-       status = usb_resume_both(udev, msg);
-       udev->last_busy = jiffies;
-       usb_pm_unlock(udev);
-       if (status == 0)
-               do_unbind_rebind(udev, DO_REBIND);
-
-       /* Now that the device is awake, we can start trying to autosuspend
-        * it again. */
-       if (status == 0)
-               usb_try_autosuspend_device(udev);
-       return status;
-}
-
-int usb_suspend(struct device *dev, pm_message_t msg)
-{
-       struct usb_device       *udev;
-
-       udev = to_usb_device(dev);
-
-       /* If udev is already suspended, we can skip this suspend and
-        * we should also skip the upcoming system resume.  High-speed
-        * root hubs are an exception; they need to resume whenever the
-        * system wakes up in order for USB-PERSIST port handover to work
-        * properly.
-        */
-       if (udev->state == USB_STATE_SUSPENDED) {
-               if (udev->parent || udev->speed != USB_SPEED_HIGH)
-                       udev->skip_sys_resume = 1;
-               return 0;
-       }
-
-       udev->skip_sys_resume = 0;
-       return usb_external_suspend_device(udev, msg);
-}
-
-int usb_resume(struct device *dev, pm_message_t msg)
-{
-       struct usb_device       *udev;
-       int                     status;
-
-       udev = to_usb_device(dev);
-
-       /* If udev->skip_sys_resume is set then udev was already suspended
-        * when the system sleep started, so we don't want to resume it
-        * during this system wakeup.
-        */
-       if (udev->skip_sys_resume)
-               return 0;
-       status = usb_external_resume_device(udev, msg);
-
-       /* Avoid PM error messages for devices disconnected while suspended
-        * as we'll display regular disconnect messages just a bit later.
-        */
-       if (status == -ENODEV)
-               return 0;
-       return status;
-}
-
-#endif /* CONFIG_PM */
-
 struct bus_type usb_bus_type = {
        .name =         "usb",
        .match =        usb_device_match,