block: kyber: fix domain token leak during requeue

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 <[email protected]>
Cc: Omar Sandoval <[email protected]>
Cc: [email protected]
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c
index f95c60774ce8ca613417d3ccf54bee52010752ee..0d6d25e32e1f44fda0049bb3e213b85a3debfa1f 100644 (file)
--- 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,