block, drivers: add REQ_OP_FLUSH operation
This adds a REQ_OP_FLUSH operation that is sent to request_fn
based drivers by the block layer's flush code, instead of
sending requests with the request->cmd_flags REQ_FLUSH bit set.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 201a871..bca20f8 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1722,7 +1722,8 @@
!IS_ALIGNED(blk_rq_sectors(next), 8))
break;
- if (req_op(next) == REQ_OP_DISCARD || next->cmd_flags & REQ_FLUSH)
+ if (req_op(next) == REQ_OP_DISCARD ||
+ req_op(next) == REQ_OP_FLUSH)
break;
if (rq_data_dir(cur) != rq_data_dir(next))
@@ -2147,7 +2148,6 @@
struct mmc_card *card = md->queue.card;
struct mmc_host *host = card->host;
unsigned long flags;
- unsigned int cmd_flags = req ? req->cmd_flags : 0;
if (req && !mq->mqrq_prev->req)
/* claim host only for the first request */
@@ -2171,7 +2171,7 @@
ret = mmc_blk_issue_secdiscard_rq(mq, req);
else
ret = mmc_blk_issue_discard_rq(mq, req);
- } else if (cmd_flags & REQ_FLUSH) {
+ } else if (req && req_op(req) == REQ_OP_FLUSH) {
/* complete ongoing async transfer before issuing flush */
if (card->host->areq)
mmc_blk_issue_rw_rq(mq, NULL);