1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index f1f32d7be5f9..3c2bc075ef4f 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -779,7 +779,7 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
                 return -EINVAL;
         if (dum->driver)
                 return -EBUSY;
-        if (!driver->bind || !driver->unbind || !driver->setup
+        if (!driver->bind || !driver->setup
                         || driver->speed == USB_SPEED_UNKNOWN)
                 return -EINVAL;
 
@@ -837,7 +837,8 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
 err_bind_driver:
         driver_unregister (&driver->driver);
 err_register:
-        driver->unbind (&dum->gadget);
+        if (driver->unbind)
+                driver->unbind (&dum->gadget);
         spin_lock_irq (&dum->lock);
         dum->pullup = 0;
         set_link_state (dum);
@@ -857,7 +858,7 @@ usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
 
         if (!dum)
                 return -ENODEV;
-        if (!driver || driver != dum->driver)
+        if (!driver || driver != dum->driver || !driver->unbind)
                 return -EINVAL;
 
         dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",