--- zzzz-none-000/linux-2.6.39.4/block/blk-exec.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/block/blk-exec.c	2021-11-10 13:23:10.000000000 +0000
@@ -50,6 +50,14 @@
 {
 	int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
 
+	/*== 20161123 AVM/WKR don't access dead queues ==*/
+	if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+		rq->errors = -ENXIO;
+		if (rq->end_io)
+			rq->end_io(rq, rq->errors);
+		return;
+	}
+
 	rq->rq_disk = bd_disk;
 	rq->end_io = done;
 	WARN_ON(irqs_disabled());