65 static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr,  in do_blktrans_request()  argument
72 	block = blk_rq_pos(req) << 9 >> tr->blkshift;  in do_blktrans_request()
73 	nsect = blk_rq_cur_bytes(req) >> tr->blkshift;  in do_blktrans_request()
76 		if (tr->flush(dev))  in do_blktrans_request()
87 		if (tr->discard(dev, block, nsect))  in do_blktrans_request()
92 		for (; nsect > 0; nsect--, block++, buf += tr->blksize) {  in do_blktrans_request()
93 			if (tr->readsect(dev, block, buf)) {  in do_blktrans_request()
102 		if (!tr->writesect)  in do_blktrans_request()
107 		for (; nsect > 0; nsect--, block++, buf += tr->blksize) {  in do_blktrans_request()
108 			if (tr->writesect(dev, block, buf)) {  in do_blktrans_request()
144 	struct mtd_blktrans_ops *tr = dev->tr;  in mtd_blktrans_work()  local
153 			if (tr->background && !background_done) {  in mtd_blktrans_work()
156 				tr->background(dev);  in mtd_blktrans_work()
172 		res = do_blktrans_request(dev->tr, dev, req);  in mtd_blktrans_work()
219 	__module_get(dev->tr->owner);  in blktrans_open()
224 	if (dev->tr->open) {  in blktrans_open()
225 		ret = dev->tr->open(dev);  in blktrans_open()
243 	if (dev->tr->release)  in blktrans_open()
244 		dev->tr->release(dev);  in blktrans_open()
246 	module_put(dev->tr->owner);  in blktrans_open()
268 	module_put(dev->tr->owner);  in blktrans_release()
271 		if (dev->tr->release)  in blktrans_release()
272 			dev->tr->release(dev);  in blktrans_release()
294 	ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : -ENOTTY;  in blktrans_getgeo()
317 		ret = dev->tr->flush ? dev->tr->flush(dev) : 0;  in blktrans_ioctl()
342 	struct mtd_blktrans_ops *tr = new->tr;  in add_mtd_blktrans_dev()  local
351 	list_for_each_entry(d, &tr->devs, list) {  in add_mtd_blktrans_dev()
379 	if (new->devnum > (MINORMASK >> tr->part_bits) ||  in add_mtd_blktrans_dev()
380 	    (tr->part_bits && new->devnum >= 27 * 26)) {  in add_mtd_blktrans_dev()
385 	list_add_tail(&new->list, &tr->devs);  in add_mtd_blktrans_dev()
391 	if (!tr->writesect)  in add_mtd_blktrans_dev()
396 	gd = alloc_disk(1 << tr->part_bits);  in add_mtd_blktrans_dev()
403 	gd->major = tr->major;  in add_mtd_blktrans_dev()
404 	gd->first_minor = (new->devnum) << tr->part_bits;  in add_mtd_blktrans_dev()
407 	if (tr->part_bits)  in add_mtd_blktrans_dev()
410 				 "%s%c", tr->name, 'a' + new->devnum);  in add_mtd_blktrans_dev()
413 				 "%s%c%c", tr->name,  in add_mtd_blktrans_dev()
418 			 "%s%d", tr->name, new->devnum);  in add_mtd_blktrans_dev()
420 	set_capacity(gd, ((u64)new->size * tr->blksize) >> 9);  in add_mtd_blktrans_dev()
438 	if (tr->flush)  in add_mtd_blktrans_dev()
442 	blk_queue_logical_block_size(new->rq, tr->blksize);  in add_mtd_blktrans_dev()
447 	if (tr->discard) {  in add_mtd_blktrans_dev()
450 		new->rq->limits.discard_granularity = tr->blksize;  in add_mtd_blktrans_dev()
503 		if (old->tr->release)  in del_mtd_blktrans_dev()
504 			old->tr->release(old);  in del_mtd_blktrans_dev()
517 	struct mtd_blktrans_ops *tr;  in blktrans_notify_remove()  local
520 	list_for_each_entry(tr, &blktrans_majors, list)  in blktrans_notify_remove()
521 		list_for_each_entry_safe(dev, next, &tr->devs, list)  in blktrans_notify_remove()
523 				tr->remove_dev(dev);  in blktrans_notify_remove()
528 	struct mtd_blktrans_ops *tr;  in blktrans_notify_add()  local
533 	list_for_each_entry(tr, &blktrans_majors, list)  in blktrans_notify_add()
534 		tr->add_mtd(tr, mtd);  in blktrans_notify_add()
542 int register_mtd_blktrans(struct mtd_blktrans_ops *tr)  in register_mtd_blktrans()  argument
556 	ret = register_blkdev(tr->major, tr->name);  in register_mtd_blktrans()
559 		       tr->name, tr->major, ret);  in register_mtd_blktrans()
565 		tr->major = ret;  in register_mtd_blktrans()
567 	tr->blkshift = ffs(tr->blksize) - 1;  in register_mtd_blktrans()
569 	INIT_LIST_HEAD(&tr->devs);  in register_mtd_blktrans()
570 	list_add(&tr->list, &blktrans_majors);  in register_mtd_blktrans()
574 			tr->add_mtd(tr, mtd);  in register_mtd_blktrans()
580 int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr)  in deregister_mtd_blktrans()  argument
587 	list_del(&tr->list);  in deregister_mtd_blktrans()
589 	list_for_each_entry_safe(dev, next, &tr->devs, list)  in deregister_mtd_blktrans()
590 		tr->remove_dev(dev);  in deregister_mtd_blktrans()
592 	unregister_blkdev(tr->major, tr->name);  in deregister_mtd_blktrans()
595 	BUG_ON(!list_empty(&tr->devs));  in deregister_mtd_blktrans()