diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 6ae70cb..acd513b 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -955,7 +955,10 @@ static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 	int ep_num, stopped, ret = 0;
 	u32 epctrl;
 
-	if (!_ep || !_req)
+	/* Ensure that the ep and request are valid, and the ep is not
+	 * disabled
+	 */
+	if (!_ep || !_req || !ep->ep.desc)
 		return -EINVAL;
 
 	spin_lock_irqsave(&ep->udc->lock, flags);