[PATCH 1/5] sched_ext: Fix sub_detach op check to test the parent's ops

[Tejun Heo]

sub_detach is the parent's op called to notify the parent that a child
is detaching. Test parent->ops.sub_detach instead of sch->ops.sub_detach.

Fixes: ebeca1f930ea ("sched_ext: Introduce cgroup sub-sched support")
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
 kernel/sched/ext.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 07476355bfd5..8bf4b51ad0e5 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -5438,7 +5438,7 @@ static void scx_sub_disable(struct scx_sched *sch)
 	 */
 	wake_up_all(&scx_unlink_waitq);
 
-	if (sch->ops.sub_detach && sch->sub_attached) {
+	if (parent->ops.sub_detach && sch->sub_attached) {
 		struct scx_sub_detach_args sub_detach_args = {
 			.ops = &sch->ops,
 			.cgroup_path = sch->cgrp_path,
-- 
2.53.0