Index: usb-devel/drivers/usb/core/urb.c
===================================================================
--- usb-devel.orig/drivers/usb/core/urb.c
+++ usb-devel/drivers/usb/core/urb.c
@@ -204,10 +204,14 @@ int usb_urb_ep_type_check(const struct u
 	const struct usb_host_endpoint *ep;
 
 	ep = usb_pipe_endpoint(urb->dev, urb->pipe);
-	if (!ep)
+	if (!ep) {
+		dev_info(&urb->dev->dev, "Pipe 0x%x, no ep\n", urb->pipe);
 		return -EINVAL;
-	if (usb_pipetype(urb->pipe) != pipetypes[usb_endpoint_type(&ep->desc)])
+	}
+	if (usb_pipetype(urb->pipe) != pipetypes[usb_endpoint_type(&ep->desc)]) {
+		dev_info(&urb->dev->dev, "Pipe/ep type mismatch\n");
 		return -EINVAL;
+	}
 	return 0;
 }
 EXPORT_SYMBOL_GPL(usb_urb_ep_type_check);