usb: musb: gadget: clear gadget_driver when gadget is stopped

Some musb glue drivers use gadget_driver pointer to know if any gadget drivers are loaded at some moment and base further decisions on it, like to do runtime suspend/resume or not. Right now the pointer is left alone on stop and OMAP musb glue later does wrong runtime_pm decisions because of it.

Clear the gadget_driver pointer on remove, it's invalid after stop anyway.

---
 drivers/usb/musb/musb_gadget.c |    1 +
 1 file changed, 1 insertion(+)

index 19998e9..1ddb889 100644
@@ -2057,6 +2057,7 @@ static int musb_gadget_stop(struct usb_gadget *g,
 	dev_dbg(musb->controller, "unregistering driver %s\n", driver->function);
 
 	musb->is_active = 0;
+	musb->gadget_driver = NULL;
 	musb_platform_try_idle(musb, 0);
 	spin_unlock_irqrestore(&musb->lock, flags);
 

1.7.9.5

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