blk-mq: remove blk_mq_alloc_tag_set_tags

There is no point in trying to share any code with the realloc case when
all that is needed by the initial tagset allocation is a simple
kcalloc_node.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20221109100811.2413423-1-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-mq.c

@@ -4398,12 +4398,6 @@ static int blk_mq_realloc_tag_set_tags(struct blk_mq_tag_set *set,
 	return 0;
 }
 
-static int blk_mq_alloc_tag_set_tags(struct blk_mq_tag_set *set,
-				int new_nr_hw_queues)
-{
-	return blk_mq_realloc_tag_set_tags(set, 0, new_nr_hw_queues);
-}
-
 /*
  * Alloc a tag set to be associated with one or more request queues.
  * May fail with EINVAL for various error conditions. May adjust the
@@ -4466,11 +4460,13 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
 			goto out_free_srcu;
 	}
 
-	ret = blk_mq_alloc_tag_set_tags(set, set->nr_hw_queues);
-	if (ret)
+	ret = -ENOMEM;
+	set->tags = kcalloc_node(set->nr_hw_queues,
+				 sizeof(struct blk_mq_tags *), GFP_KERNEL,
+				 set->numa_node);
+	if (!set->tags)
 		goto out_cleanup_srcu;
 
-	ret = -ENOMEM;
 	for (i = 0; i < set->nr_maps; i++) {
 		set->map[i].mq_map = kcalloc_node(nr_cpu_ids,
 						  sizeof(set->map[i].mq_map[0]),