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-rw-r--r--block/blk-flush.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c
index c486b7aa62ee..1bdbb3d3e5f5 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -396,6 +396,13 @@ void blk_insert_flush(struct request *rq)
rq->cmd_flags &= ~REQ_FUA;
/*
+ * REQ_PREFLUSH|REQ_FUA implies REQ_SYNC, so if we clear any
+ * of those flags, we have to set REQ_SYNC to avoid skewing
+ * the request accounting.
+ */
+ rq->cmd_flags |= REQ_SYNC;
+
+ /*
* An empty flush handed down from a stacking driver may
* translate into nothing if the underlying device does not
* advertise a write-back cache. In this case, simply