ps3disk: use blk_mq_alloc_disk

Use the blk_mq_alloc_disk API to simplify the gendisk and request_queue
allocation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Geoff Levand <geoff@infradead.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210602065345.355274-11-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/ps3disk.c

@@ -29,7 +29,6 @@
 
 struct ps3disk_private {
 	spinlock_t lock;		/* Request queue spinlock */
-	struct request_queue *queue;
 	struct blk_mq_tag_set tag_set;
 	struct gendisk *gendisk;
 	unsigned int blocking_factor;
@@ -267,7 +266,7 @@ static irqreturn_t ps3disk_interrupt(int irq, void *data)
 	blk_mq_end_request(req, error);
 	spin_unlock(&priv->lock);
 
-	blk_mq_run_hw_queues(priv->queue, true);
+	blk_mq_run_hw_queues(priv->gendisk->queue, true);
 	return IRQ_HANDLED;
 }
 
@@ -441,17 +440,20 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
 
 	ps3disk_identify(dev);
 
-	queue = blk_mq_init_sq_queue(&priv->tag_set, &ps3disk_mq_ops, 1,
+	error = blk_mq_alloc_sq_tag_set(&priv->tag_set, &ps3disk_mq_ops, 1,
 					BLK_MQ_F_SHOULD_MERGE);
-	if (IS_ERR(queue)) {
-		dev_err(&dev->sbd.core, "%s:%u: blk_mq_init_queue failed\n",
-			__func__, __LINE__);
-		error = PTR_ERR(queue);
+	if (error)
 		goto fail_teardown;
+
+	gendisk = blk_mq_alloc_disk(&priv->tag_set, dev);
+	if (IS_ERR(gendisk)) {
+		dev_err(&dev->sbd.core, "%s:%u: blk_mq_alloc_disk failed\n",
+			__func__, __LINE__);
+		error = PTR_ERR(gendisk);
+		goto fail_free_tag_set;
 	}
 
-	priv->queue = queue;
-	queue->queuedata = dev;
+	queue = gendisk->queue;
 
 	blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
 	blk_queue_dma_alignment(queue, dev->blk_size-1);
@@ -462,19 +464,11 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
 	blk_queue_max_segments(queue, -1);
 	blk_queue_max_segment_size(queue, dev->bounce_size);
 
-	gendisk = alloc_disk(PS3DISK_MINORS);
-	if (!gendisk) {
-		dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
-			__LINE__);
-		error = -ENOMEM;
-		goto fail_cleanup_queue;
-	}
-
 	priv->gendisk = gendisk;
 	gendisk->major = ps3disk_major;
 	gendisk->first_minor = devidx * PS3DISK_MINORS;
+	gendisk->minors = PS3DISK_MINORS;
 	gendisk->fops = &ps3disk_fops;
-	gendisk->queue = queue;
 	gendisk->private_data = dev;
 	snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
 		 devidx+'a');
@@ -490,8 +484,7 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
 	device_add_disk(&dev->sbd.core, gendisk, NULL);
 	return 0;
 
-fail_cleanup_queue:
-	blk_cleanup_queue(queue);
+fail_free_tag_set:
 	blk_mq_free_tag_set(&priv->tag_set);
 fail_teardown:
 	ps3stor_teardown(dev);
@@ -517,9 +510,8 @@ static void ps3disk_remove(struct ps3_system_bus_device *_dev)
 		    &ps3disk_mask);
 	mutex_unlock(&ps3disk_mask_mutex);
 	del_gendisk(priv->gendisk);
-	blk_cleanup_queue(priv->queue);
+	blk_cleanup_disk(priv->gendisk);
 	blk_mq_free_tag_set(&priv->tag_set);
-	put_disk(priv->gendisk);
 	dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
 	ps3disk_sync_cache(dev);
 	ps3stor_teardown(dev);