diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 2ce3667ec6fa..2f71636af6e1 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -688,6 +688,10 @@ EXPORT_SYMBOL_GPL(usb_alloc_dev);
  * Drivers for USB interfaces should normally record such references in
  * their probe() methods, when they bind to an interface, and release
  * them by calling usb_put_dev(), in their disconnect() methods.
+ * However, if a driver does not access the usb_device structure after
+ * its disconnect() method returns then refcounting is not necessary,
+ * because the USB core guarantees that a usb_device will not be
+ * deallocated until after all of its interface drivers have been unbound.
  *
  * Return: A pointer to the device with the incremented reference counter.
  */
@@ -722,6 +726,10 @@ EXPORT_SYMBOL_GPL(usb_put_dev);
  * Drivers for USB interfaces should normally record such references in
  * their probe() methods, when they bind to an interface, and release
  * them by calling usb_put_intf(), in their disconnect() methods.
+ * However, if a driver does not access the usb_interface structure after
+ * its disconnect() method returns then refcounting is not necessary,
+ * because the USB core guarantees that a usb_interface will not be
+ * deallocated until after its driver has been unbound.
  *
  * Return: A pointer to the interface with the incremented reference counter.
  */