author: Saravanan D <saravanand@fb.com> 2021-04-07 10:59:58 -0700
committer: Jens Axboe <axboe@kernel.dk> 2021-04-16 15:17:01 -0600
commit: 1e91e28e374d0b0b912154c192716374609360d9
parent: 7687b38ae470f01749e420079c36cccb24b8619a
Commit Summary:
Diffstat:
1 file changed, 8 insertions, 0 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 9ebb344e2585..8ea96d83d599 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -973,6 +973,14 @@ void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
{
struct elevator_type *e = q->elevator->type;
+ /*
+ * If the parent debugfs directory has not been created yet, return;
+ * We will be called again later on with appropriate parent debugfs
+ * directory from blk_register_queue()
+ */
+ if (!hctx->debugfs_dir)
+ return;
+
if (!e->hctx_debugfs_attrs)
return;