6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
[ Upstream commit 28b241237470981a96fbd82077c8044466b61e5f ]
If the policy == (REQ_FSEQ_DATA | REQ_FSEQ_POSTFLUSH), it means that the
data sequence and post-flush sequence need to be done for this request.
The rq->flush.seq should record what sequences have been done (or don't
need to be done). So in this case, pre-flush doesn't need to be done,
we should init rq->flush.seq to REQ_FSEQ_PREFLUSH not REQ_FSEQ_POSTFLUSH.
Fixes: 615939a2ae73 ("blk-mq: defer to the normal submission path for post-flush requests")
Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Link: https://lore.kernel.org/r/20230717040058.3993930-3-chengming.zhou@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
block/blk-flush.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-flush.c b/block/blk-flush.c
index 8220517c2d67d..fdc489e0ea162 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -443,7 +443,7 @@ bool blk_insert_flush(struct request *rq)
* the post flush, and then just pass the command on.
*/
blk_rq_init_flush(rq);
- rq->flush.seq |= REQ_FSEQ_POSTFLUSH;
+ rq->flush.seq |= REQ_FSEQ_PREFLUSH;
spin_lock_irq(&fq->mq_flush_lock);
list_move_tail(&rq->flush.list, &fq->flush_data_in_flight);
spin_unlock_irq(&fq->mq_flush_lock);
--
2.40.1
