drivers/mtd/mtd_blkdevs.c

276 int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
278 	struct mtd_blktrans_ops *tr = new->tr;
288 		if (new->devnum == -1) {
292 				new->devnum = last_devnum+1;
293 				list_add_tail(&new->list, &d->list);
296 		} else if (d->devnum == new->devnum) {
299 		} else if (d->devnum > new->devnum) {
301 			list_add_tail(&new->list, &d->list);
308 	if (new->devnum == -1)
309 		new->devnum = last_devnum+1;
314 	if (new->devnum > (MINORMASK >> tr->part_bits) ||
315 	    (tr->part_bits && new->devnum >= 27 * 26))
318 	list_add_tail(&new->list, &tr->devs);
321 	mutex_init(&new->lock);
322 	kref_init(&new->ref);
324 		new->readonly = 1;
327 	new->tag_set = kzalloc(sizeof(*new->tag_set), GFP_KERNEL);
328 	if (!new->tag_set)
331 	ret = blk_mq_alloc_sq_tag_set(new->tag_set, &mtd_mq_ops, 2,
341 	gd = blk_mq_alloc_disk(new->tag_set, &lim, new);
347 	new->disk = gd;
348 	new->rq = new->disk->queue;
349 	gd->private_data = new;
351 	gd->first_minor = (new->devnum) << tr->part_bits;
356 		if (new->devnum < 26)
358 				 "%s%c", tr->name, 'a' + new->devnum);
362 				 'a' - 1 + new->devnum / 26,
363 				 'a' + new->devnum % 26);
366 			 "%s%d", tr->name, new->devnum);
370 	set_capacity(gd, ((u64)new->size * tr->blksize) >> 9);
373 	spin_lock_init(&new->queue_lock);
374 	INIT_LIST_HEAD(&new->rq_list);
377 		blk_queue_write_cache(new->rq, true, false);
379 	blk_queue_flag_set(QUEUE_FLAG_NONROT, new->rq);
380 	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq);
382 	gd->queue = new->rq;
384 	if (new->readonly)
387 	ret = device_add_disk(&new->mtd->dev, gd, NULL);
391 	if (new->disk_attributes) {
393 					new->disk_attributes);
399 	put_disk(new->disk);
401 	blk_mq_free_tag_set(new->tag_set);
403 	kfree(new->tag_set);
405 	list_del(&new->list);
419 	/* Stop new requests to arrive */