blk-mq: improve the blk_mq_init_allocated_queue interface
Don't return the passed in request_queue but a normal error code, and
drop the elevator_init argument in favor of just calling elevator_init_mq
directly from dm-rq.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210602065345.355274-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 867e5fa..8550ad6 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3115,21 +3115,18 @@ void blk_mq_release(struct request_queue *q)
struct request_queue *blk_mq_init_queue_data(struct blk_mq_tag_set *set,
void *queuedata)
{
- struct request_queue *uninit_q, *q;
+ struct request_queue *q;
+ int ret;
- uninit_q = blk_alloc_queue(set->numa_node);
- if (!uninit_q)
+ q = blk_alloc_queue(set->numa_node);
+ if (!q)
return ERR_PTR(-ENOMEM);
- uninit_q->queuedata = queuedata;
-
- /*
- * Initialize the queue without an elevator. device_add_disk() will do
- * the initialization.
- */
- q = blk_mq_init_allocated_queue(set, uninit_q, false);
- if (IS_ERR(q))
- blk_cleanup_queue(uninit_q);
-
+ q->queuedata = queuedata;
+ ret = blk_mq_init_allocated_queue(set, q);
+ if (ret) {
+ blk_cleanup_queue(q);
+ return ERR_PTR(ret);
+ }
return q;
}
EXPORT_SYMBOL_GPL(blk_mq_init_queue_data);
@@ -3273,9 +3270,8 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
mutex_unlock(&q->sysfs_lock);
}
-struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
- struct request_queue *q,
- bool elevator_init)
+int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
+ struct request_queue *q)
{
/* mark the queue as mq asap */
q->mq_ops = set->ops;
@@ -3325,11 +3321,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
blk_mq_init_cpu_queues(q, set->nr_hw_queues);
blk_mq_add_queue_tag_set(set, q);
blk_mq_map_swqueue(q);
-
- if (elevator_init)
- elevator_init_mq(q);
-
- return q;
+ return 0;
err_hctxs:
kfree(q->queue_hw_ctx);
@@ -3340,7 +3332,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
q->poll_cb = NULL;
err_exit:
q->mq_ops = NULL;
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
}
EXPORT_SYMBOL(blk_mq_init_allocated_queue);
