45 static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr,  in do_blktrans_request()  argument
54 	block = blk_rq_pos(req) << 9 >> tr->blkshift;  in do_blktrans_request()
55 	nsect = blk_rq_cur_bytes(req) >> tr->blkshift;  in do_blktrans_request()
59 		if (tr->flush(dev))  in do_blktrans_request()
63 		if (tr->discard(dev, block, nsect))  in do_blktrans_request()
68 		for (; nsect > 0; nsect--, block++, buf += tr->blksize) {  in do_blktrans_request()
69 			if (tr->readsect(dev, block, buf)) {  in do_blktrans_request()
80 		if (!tr->writesect)  in do_blktrans_request()
87 		for (; nsect > 0; nsect--, block++, buf += tr->blksize) {  in do_blktrans_request()
88 			if (tr->writesect(dev, block, buf)) {  in do_blktrans_request()
124 	struct mtd_blktrans_ops *tr = dev->tr;  in mtd_blktrans_work()  local
133 			if (tr->background && !background_done) {  in mtd_blktrans_work()
136 				tr->background(dev);  in mtd_blktrans_work()
152 		res = do_blktrans_request(dev->tr, dev, req);  in mtd_blktrans_work()
197 	__module_get(dev->tr->owner);  in blktrans_open()
202 	if (dev->tr->open) {  in blktrans_open()
203 		ret = dev->tr->open(dev);  in blktrans_open()
219 	if (dev->tr->release)  in blktrans_open()
220 		dev->tr->release(dev);  in blktrans_open()
222 	module_put(dev->tr->owner);  in blktrans_open()
237 	module_put(dev->tr->owner);  in blktrans_release()
240 		if (dev->tr->release)  in blktrans_release()
241 			dev->tr->release(dev);  in blktrans_release()
259 	ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : -ENOTTY;  in blktrans_getgeo()
278 	struct mtd_blktrans_ops *tr = new->tr;  in add_mtd_blktrans_dev()  local
286 	list_for_each_entry(d, &tr->devs, list) {  in add_mtd_blktrans_dev()
313 	if (new->devnum > (MINORMASK >> tr->part_bits) ||  in add_mtd_blktrans_dev()
314 	    (tr->part_bits && new->devnum >= 27 * 26))  in add_mtd_blktrans_dev()
317 	list_add_tail(&new->list, &tr->devs);  in add_mtd_blktrans_dev()
322 	if (!tr->writesect)  in add_mtd_blktrans_dev()
345 	gd->major = tr->major;  in add_mtd_blktrans_dev()
346 	gd->first_minor = (new->devnum) << tr->part_bits;  in add_mtd_blktrans_dev()
347 	gd->minors = 1 << tr->part_bits;  in add_mtd_blktrans_dev()
350 	if (tr->part_bits) {  in add_mtd_blktrans_dev()
353 				 "%s%c", tr->name, 'a' + new->devnum);  in add_mtd_blktrans_dev()
356 				 "%s%c%c", tr->name,  in add_mtd_blktrans_dev()
361 			 "%s%d", tr->name, new->devnum);  in add_mtd_blktrans_dev()
365 	set_capacity(gd, ((u64)new->size * tr->blksize) >> 9);  in add_mtd_blktrans_dev()
371 	if (tr->flush)  in add_mtd_blktrans_dev()
374 	blk_queue_logical_block_size(new->rq, tr->blksize);  in add_mtd_blktrans_dev()
379 	if (tr->discard) {  in add_mtd_blktrans_dev()
381 		new->rq->limits.discard_granularity = tr->blksize;  in add_mtd_blktrans_dev()
439 		if (old->tr->release)  in del_mtd_blktrans_dev()
440 			old->tr->release(old);  in del_mtd_blktrans_dev()
453 	struct mtd_blktrans_ops *tr;  in blktrans_notify_remove()  local
456 	list_for_each_entry(tr, &blktrans_majors, list)  in blktrans_notify_remove()
457 		list_for_each_entry_safe(dev, next, &tr->devs, list)  in blktrans_notify_remove()
459 				tr->remove_dev(dev);  in blktrans_notify_remove()
464 	struct mtd_blktrans_ops *tr;  in blktrans_notify_add()  local
469 	list_for_each_entry(tr, &blktrans_majors, list)  in blktrans_notify_add()
470 		tr->add_mtd(tr, mtd);  in blktrans_notify_add()
478 int register_mtd_blktrans(struct mtd_blktrans_ops *tr)  in register_mtd_blktrans()  argument
489 	ret = register_blkdev(tr->major, tr->name);  in register_mtd_blktrans()
492 		       tr->name, tr->major, ret);  in register_mtd_blktrans()
497 		tr->major = ret;  in register_mtd_blktrans()
499 	tr->blkshift = ffs(tr->blksize) - 1;  in register_mtd_blktrans()
501 	INIT_LIST_HEAD(&tr->devs);  in register_mtd_blktrans()
504 	list_add(&tr->list, &blktrans_majors);  in register_mtd_blktrans()
507 			tr->add_mtd(tr, mtd);  in register_mtd_blktrans()
512 int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr)  in deregister_mtd_blktrans()  argument
519 	list_del(&tr->list);  in deregister_mtd_blktrans()
521 	list_for_each_entry_safe(dev, next, &tr->devs, list)  in deregister_mtd_blktrans()
522 		tr->remove_dev(dev);  in deregister_mtd_blktrans()
525 	unregister_blkdev(tr->major, tr->name);  in deregister_mtd_blktrans()
527 	BUG_ON(!list_empty(&tr->devs));  in deregister_mtd_blktrans()