[Patch v9 01/10] block: Pass blk_queue_get_max_sectors() a request pointer

[John Garry]

Currently blk_queue_get_max_sectors() is passed a enum req_op. In future
the value returned from blk_queue_get_max_sectors() may depend on certain
request flags, so pass a request pointer.

Reviewed-by: Christoph Hellwig <hch at lst.de>
Reviewed-by: Keith Busch <kbusch at kernel.org>
Reviewed-by: Luis Chamberlain <mcgrof at kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>
Signed-off-by: John Garry <john.g.garry at oracle.com>
---
 block/blk-merge.c | 3 ++-
 block/blk-mq.c    | 2 +-
 block/blk.h       | 6 ++++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 8534c35e0497..8957e08e020c 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -593,7 +593,8 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
 	if (blk_rq_is_passthrough(rq))
 		return q->limits.max_hw_sectors;
 
-	max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
+	max_sectors = blk_queue_get_max_sectors(rq);
+
 	if (!q->limits.chunk_sectors ||
 	    req_op(rq) == REQ_OP_DISCARD ||
 	    req_op(rq) == REQ_OP_SECURE_ERASE)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index e2b9710ddc5a..47fe9d19b8f1 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3036,7 +3036,7 @@ void blk_mq_submit_bio(struct bio *bio)
 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));
+	unsigned int max_sectors = blk_queue_get_max_sectors(rq);
 	unsigned int max_segments = blk_rq_get_max_segments(rq);
 	blk_status_t ret;
 
diff --git a/block/blk.h b/block/blk.h
index fa32f7fad5d7..20c5718815e2 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -182,9 +182,11 @@ static inline unsigned int blk_rq_get_max_segments(struct request *rq)
 	return queue_max_segments(rq->q);
 }
 
-static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
-						     enum req_op op)
+static inline unsigned int blk_queue_get_max_sectors(struct request *rq)
 {
+	struct request_queue *q = rq->q;
+	enum req_op op = req_op(rq);
+
 	if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
 		return min(q->limits.max_discard_sectors,
 			   UINT_MAX >> SECTOR_SHIFT);
-- 
2.31.1