[dm-devel] [PATCH 3/5] blk-mq: remove the request_queue argument to blk_insert_cloned_request

[Christoph Hellwig]

The request must be submitted to the queue it was allocated for, so
remove the extra request_queue argument.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 block/blk-mq.c         | 9 ++++-----
 drivers/md/dm-rq.c     | 2 +-
 include/linux/blk-mq.h | 3 +--
 3 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index fc132933397fb..886836a54064c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2843,11 +2843,11 @@ void blk_mq_submit_bio(struct bio *bio)
 #ifdef CONFIG_BLK_MQ_STACKING
 /**
  * blk_insert_cloned_request - Helper for stacking drivers to submit a request
- * @q:  the queue to submit the request
  * @rq: the request being queued
  */
-blk_status_t blk_insert_cloned_request(struct request_queue *q, struct request *rq)
+blk_status_t blk_insert_cloned_request(struct request *rq)
 {
+	struct request_queue *q = rq->q;
 	unsigned int max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
 	blk_status_t ret;
 
@@ -2881,8 +2881,7 @@ blk_status_t blk_insert_cloned_request(struct request_queue *q, struct request *
 		return BLK_STS_IOERR;
 	}
 
-	if (rq->q->disk &&
-	    should_fail_request(rq->q->disk->part0, blk_rq_bytes(rq)))
+	if (q->disk && should_fail_request(q->disk->part0, blk_rq_bytes(rq)))
 		return BLK_STS_IOERR;
 
 	if (blk_crypto_insert_cloned_request(rq))
@@ -2895,7 +2894,7 @@ blk_status_t blk_insert_cloned_request(struct request_queue *q, struct request *
 	 * bypass a potential scheduler on the bottom device for
 	 * insert.
 	 */
-	blk_mq_run_dispatch_ops(rq->q,
+	blk_mq_run_dispatch_ops(q,
 			ret = blk_mq_request_issue_directly(rq, true));
 	if (ret)
 		blk_account_io_done(rq, ktime_get_ns());
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 579ab6183d4d8..2fcc9b7f391b3 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -311,7 +311,7 @@ static blk_status_t dm_dispatch_clone_request(struct request *clone, struct requ
 		clone->rq_flags |= RQF_IO_STAT;
 
 	clone->start_time_ns = ktime_get_ns();
-	r = blk_insert_cloned_request(clone->q, clone);
+	r = blk_insert_cloned_request(clone);
 	if (r != BLK_STS_OK && r != BLK_STS_RESOURCE && r != BLK_STS_DEV_RESOURCE)
 		/* must complete clone in terms of original request */
 		dm_complete_request(rq, r);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index d319ffa59354a..3a41d50b85d3a 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -952,8 +952,7 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
 		struct bio_set *bs, gfp_t gfp_mask,
 		int (*bio_ctr)(struct bio *, struct bio *, void *), void *data);
 void blk_rq_unprep_clone(struct request *rq);
-blk_status_t blk_insert_cloned_request(struct request_queue *q,
-		struct request *rq);
+blk_status_t blk_insert_cloned_request(struct request *rq);
 
 struct rq_map_data {
 	struct page **pages;
-- 
2.30.2