1 files changed, 14 insertions, 5 deletions

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 33292c01875d..228a6696d835 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -611,6 +611,7 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q,
 		.nr_tags	= 1,
 	};
 	u64 alloc_time_ns = 0;
+	struct request *rq;
 	unsigned int cpu;
 	unsigned int tag;
 	int ret;
@@ -660,8 +661,12 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q,
 	tag = blk_mq_get_tag(&data);
 	if (tag == BLK_MQ_NO_TAG)
 		goto out_queue_exit;
-	return blk_mq_rq_ctx_init(&data, blk_mq_tags_from_data(&data), tag,
+	rq = blk_mq_rq_ctx_init(&data, blk_mq_tags_from_data(&data), tag,
 					alloc_time_ns);
+	rq->__data_len = 0;
+	rq->__sector = (sector_t) -1;
+	rq->bio = rq->biotail = NULL;
+	return rq;
 
 out_queue_exit:
 	blk_queue_exit(q);
@@ -1257,6 +1262,7 @@ static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)
 		   (!blk_queue_nomerges(rq->q) &&
 		    blk_rq_bytes(last) >= BLK_PLUG_FLUSH_SIZE)) {
 		blk_mq_flush_plug_list(plug, false);
+		last = NULL;
 		trace_block_plug(rq->q);
 	}
 
@@ -4039,9 +4045,14 @@ EXPORT_SYMBOL(__blk_mq_alloc_disk);
 struct gendisk *blk_mq_alloc_disk_for_queue(struct request_queue *q,
 		struct lock_class_key *lkclass)
 {
+	struct gendisk *disk;
+
 	if (!blk_get_queue(q))
 		return NULL;
-	return __alloc_disk_node(q, NUMA_NO_NODE, lkclass);
+	disk = __alloc_disk_node(q, NUMA_NO_NODE, lkclass);
+	if (!disk)
+		blk_put_queue(q);
+	return disk;
 }
 EXPORT_SYMBOL(blk_mq_alloc_disk_for_queue);
 
@@ -4188,9 +4199,7 @@ int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
 	return 0;
 
 err_hctxs:
-	xa_destroy(&q->hctx_table);
-	q->nr_hw_queues = 0;
-	blk_mq_sysfs_deinit(q);
+	blk_mq_release(q);
 err_poll:
 	blk_stat_free_callback(q->poll_cb);
 	q->poll_cb = NULL;