--- zzzz-none-000/linux-4.1.38/block/blk-sysfs.c	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/block/blk-sysfs.c	2020-11-25 10:06:48.000000000 +0000
@@ -501,6 +501,9 @@
 	struct request_queue *q =
 		container_of(kobj, struct request_queue, kobj);
 
+#if defined(CONFIG_BCM_KF_MISC_BACKPORTS)
+	bdi_exit(&q->backing_dev_info);
+#endif
 	blkcg_exit_queue(q);
 
 	if (q->elevator) {