[v4,07/13] blk-mq: Pass driver tags to blk_mq_clear_rq_mapping()

Commit Message

John Garry Sept. 24, 2021, 8:28 a.m. UTC

Function blk_mq_clear_rq_mapping() will be used for shared sbitmap tags
in future, so pass a driver tags pointer instead of the tagset container
and HW queue index.

Signed-off-by: John Garry <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
---
 block/blk-mq.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

Comments

Ming Lei Sept. 26, 2021, 1:42 a.m. UTC | #1

On Fri, Sep 24, 2021 at 04:28:24PM +0800, John Garry wrote:
> Function blk_mq_clear_rq_mapping() will be used for shared sbitmap tags
> in future, so pass a driver tags pointer instead of the tagset container
> and HW queue index.
> 
> Signed-off-by: John Garry <[e-mail]>
> Reviewed-by: Hannes Reinecke <[e-mail]>

Reviewed-by: Ming Lei <[e-mail]>

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 47d6ab725bcc..4bae8afdfbe1 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2302,10 +2302,9 @@  static size_t order_to_size(unsigned int order)
 }
 
 /* called before freeing request pool in @tags */
-static void blk_mq_clear_rq_mapping(struct blk_mq_tag_set *set,
-		struct blk_mq_tags *tags, unsigned int hctx_idx)
+static void blk_mq_clear_rq_mapping(struct blk_mq_tags *drv_tags,
+				    struct blk_mq_tags *tags)
 {
-	struct blk_mq_tags *drv_tags = set->tags[hctx_idx];
 	struct page *page;
 	unsigned long flags;
 
@@ -2314,7 +2313,7 @@  static void blk_mq_clear_rq_mapping(struct blk_mq_tag_set *set,
 		unsigned long end = start + order_to_size(page->private);
 		int i;
 
-		for (i = 0; i < set->queue_depth; i++) {
+		for (i = 0; i < drv_tags->nr_tags; i++) {
 			struct request *rq = drv_tags->rqs[i];
 			unsigned long rq_addr = (unsigned long)rq;
 
@@ -2338,8 +2337,11 @@  static void blk_mq_clear_rq_mapping(struct blk_mq_tag_set *set,
 void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
 		     unsigned int hctx_idx)
 {
+	struct blk_mq_tags *drv_tags;
 	struct page *page;
 
+	drv_tags = set->tags[hctx_idx];
+
 	if (tags->static_rqs && set->ops->exit_request) {
 		int i;
 
@@ -2353,7 +2355,7 @@  void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
 		}
 	}
 
-	blk_mq_clear_rq_mapping(set, tags, hctx_idx);
+	blk_mq_clear_rq_mapping(drv_tags, tags);
 
 	while (!list_empty(&tags->page_list)) {
 		page = list_first_entry(&tags->page_list, struct page, lru);