1 files changed, 19 insertions, 20 deletions

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 7936e5f5821c..495396425bad 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -664,17 +664,13 @@ static struct ioc *q_to_ioc(struct request_queue *q)
 	return rqos_to_ioc(rq_qos_id(q, RQ_QOS_COST));
 }
 
-static const char *q_name(struct request_queue *q)
-{
-	if (blk_queue_registered(q))
-		return kobject_name(q->kobj.parent);
-	else
-		return "<unknown>";
-}
-
 static const char __maybe_unused *ioc_name(struct ioc *ioc)
 {
-	return q_name(ioc->rqos.q);
+	struct gendisk *disk = ioc->rqos.q->disk;
+
+	if (!disk)
+		return "<unknown>";
+	return disk->disk_name;
 }
 
 static struct ioc_gq *pd_to_iocg(struct blkg_policy_data *pd)
@@ -1430,7 +1426,7 @@ static int iocg_wake_fn(struct wait_queue_entry *wq_entry, unsigned mode,
 			int flags, void *key)
 {
 	struct iocg_wait *wait = container_of(wq_entry, struct iocg_wait, wait);
-	struct iocg_wake_ctx *ctx = (struct iocg_wake_ctx *)key;
+	struct iocg_wake_ctx *ctx = key;
 	u64 cost = abs_cost_to_cost(wait->abs_cost, ctx->hw_inuse);
 
 	ctx->vbudget -= cost;
@@ -2640,7 +2636,7 @@ retry_lock:
 	if (use_debt) {
 		iocg_incur_debt(iocg, abs_cost, &now);
 		if (iocg_kick_delay(iocg, &now))
-			blkcg_schedule_throttle(rqos->q,
+			blkcg_schedule_throttle(rqos->q->disk,
 					(bio->bi_opf & REQ_SWAP) == REQ_SWAP);
 		iocg_unlock(iocg, ioc_locked, &flags);
 		return;
@@ -2741,7 +2737,7 @@ static void ioc_rqos_merge(struct rq_qos *rqos, struct request *rq,
 	if (likely(!list_empty(&iocg->active_list))) {
 		iocg_incur_debt(iocg, abs_cost, &now);
 		if (iocg_kick_delay(iocg, &now))
-			blkcg_schedule_throttle(rqos->q,
+			blkcg_schedule_throttle(rqos->q->disk,
 					(bio->bi_opf & REQ_SWAP) == REQ_SWAP);
 	} else {
 		iocg_commit_bio(iocg, bio, abs_cost, cost);
@@ -2832,8 +2828,9 @@ static struct rq_qos_ops ioc_rqos_ops = {
 	.exit = ioc_rqos_exit,
 };
 
-static int blk_iocost_init(struct request_queue *q)
+static int blk_iocost_init(struct gendisk *disk)
 {
+	struct request_queue *q = disk->queue;
 	struct ioc *ioc;
 	struct rq_qos *rqos;
 	int i, cpu, ret;
@@ -3170,6 +3167,7 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
 			     size_t nbytes, loff_t off)
 {
 	struct block_device *bdev;
+	struct gendisk *disk;
 	struct ioc *ioc;
 	u32 qos[NR_QOS_PARAMS];
 	bool enable, user;
@@ -3180,12 +3178,13 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
 
-	ioc = q_to_ioc(bdev_get_queue(bdev));
+	disk = bdev->bd_disk;
+	ioc = q_to_ioc(disk->queue);
 	if (!ioc) {
-		ret = blk_iocost_init(bdev_get_queue(bdev));
+		ret = blk_iocost_init(disk);
 		if (ret)
 			goto err;
-		ioc = q_to_ioc(bdev_get_queue(bdev));
+		ioc = q_to_ioc(disk->queue);
 	}
 
 	spin_lock_irq(&ioc->lock);
@@ -3262,11 +3261,11 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
 	spin_lock_irq(&ioc->lock);
 
 	if (enable) {
-		blk_stat_enable_accounting(ioc->rqos.q);
-		blk_queue_flag_set(QUEUE_FLAG_RQ_ALLOC_TIME, ioc->rqos.q);
+		blk_stat_enable_accounting(disk->queue);
+		blk_queue_flag_set(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
 		ioc->enabled = true;
 	} else {
-		blk_queue_flag_clear(QUEUE_FLAG_RQ_ALLOC_TIME, ioc->rqos.q);
+		blk_queue_flag_clear(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
 		ioc->enabled = false;
 	}
 
@@ -3349,7 +3348,7 @@ static ssize_t ioc_cost_model_write(struct kernfs_open_file *of, char *input,
 
 	ioc = q_to_ioc(bdev_get_queue(bdev));
 	if (!ioc) {
-		ret = blk_iocost_init(bdev_get_queue(bdev));
+		ret = blk_iocost_init(bdev->bd_disk);
 		if (ret)
 			goto err;
 		ioc = q_to_ioc(bdev_get_queue(bdev));