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Subject[PATCH 4.14 026/110] block: kyber: fix domain token leak during requeue
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ming Lei <ming.lei@redhat.com>

commit ba989a01469d027861e55c8f1121edadef757797 upstream.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
block/kyber-iosched.c | 1 +
1 file changed, 1 insertion(+)

--- 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,

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