block: change the tag sync vs async restriction logic

Make them fully share the tag space, but disallow async requests using
the last any two slots.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/blk-barrier.c b/block/blk-barrier.c
index 0ab81a0a7502..0d98054cdbd7 100644
--- a/block/blk-barrier.c
+++ b/block/blk-barrier.c
@@ -218,7 +218,7 @@ static inline bool start_ordered(struct request_queue *q, struct request **rqp)
         } else
                 skip |= QUEUE_ORDSEQ_PREFLUSH;
 
-        if ((q->ordered & QUEUE_ORDERED_BY_DRAIN) && q->in_flight)
+        if ((q->ordered & QUEUE_ORDERED_BY_DRAIN) && queue_in_flight(q))
                 rq = NULL;
         else
                 skip |= QUEUE_ORDSEQ_DRAIN;