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.vale...@linaro.org>
Cc: Omar Sandoval <osan...@fb.com>
Signed-off-by: Ming Lei <ming....@redhat.com>
---
 block/kyber-iosched.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c
index f95c60774ce8..0d6d25e32e1f 100644
--- a/block/kyber-iosched.c
+++ b/block/kyber-iosched.c
@@ -833,6 +833,7 @@ 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,
-- 
2.9.5

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