From: Ming Lei <ming.lei@redhat.com>
Date: Fri, 23 Feb 2018 23:36:57 +0800
Subject: [PATCH] block: kyber: fix domain token leak during requeue
References: bsc#1077989
Git-commit: ba989a01469d027861e55c8f1121edadef757797
Patch-mainline: v4.16-rc4

When requeuing request, the domain token should have been freed
before re-inserting the request to io scheduler. Otherwise, the
assigned domain token will be leaked, and IO hang can be caused.

Cc: Paolo Valente <paolo.valente@linaro.org>
Cc: Omar Sandoval <osandov@fb.com>
Cc: stable@vger.kernel.org
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 block/kyber-iosched.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c
index f58cab82105b..09cd5cf2e459 100644
--- a/block/kyber-iosched.c
+++ b/block/kyber-iosched.c
@@ -814,6 +814,7 @@ static struct elevator_type kyber_sched = {
 		.limit_depth = kyber_limit_depth,
 		.prepare_request = kyber_prepare_request,
 		.finish_request = kyber_finish_request,
+		.requeue_request = kyber_finish_request,
 		.completed_request = kyber_completed_request,
 		.dispatch_request = kyber_dispatch_request,
 		.has_work = kyber_has_work,
-- 
2.12.3