usb: gadget: composite: reset delayed_status on reset_config

commit 2bac51a1 upstream.

The delayed_status value is used to keep track of status response
packets on ep0. It needs to be reset or the set_config function would
still delay the answer, if the usb device got unplugged while waiting
for setup_continue to be called.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/composite.c

@@ -584,6 +584,7 @@ static void reset_config(struct usb_composite_dev *cdev)
 		bitmap_zero(f->endpoints, 32);
 	}
 	cdev->config = NULL;
+	cdev->delayed_status = 0;
 }
 
 static int set_config(struct usb_composite_dev *cdev,