33 #define bsg_dbg(bd, fmt, ...) \  argument
34 	pr_debug("%s: " fmt, (bd)->name, ##__VA_ARGS__)
237 	struct bsg_device *bd;  in bsg_alloc_device()  local
239 	bd = kzalloc(sizeof(struct bsg_device), GFP_KERNEL);  in bsg_alloc_device()
240 	if (unlikely(!bd))  in bsg_alloc_device()
243 	spin_lock_init(&bd->lock);  in bsg_alloc_device()
244 	bd->max_queue = BSG_DEFAULT_CMDS;  in bsg_alloc_device()
245 	INIT_HLIST_NODE(&bd->dev_list);  in bsg_alloc_device()
246 	return bd;  in bsg_alloc_device()
249 static int bsg_put_device(struct bsg_device *bd)  in bsg_put_device()  argument
251 	struct request_queue *q = bd->queue;  in bsg_put_device()
255 	if (!refcount_dec_and_test(&bd->ref_count)) {  in bsg_put_device()
260 	hlist_del(&bd->dev_list);  in bsg_put_device()
263 	bsg_dbg(bd, "tearing down\n");  in bsg_put_device()
268 	kfree(bd);  in bsg_put_device()
277 	struct bsg_device *bd;  in bsg_add_device()  local
285 	bd = bsg_alloc_device();  in bsg_add_device()
286 	if (!bd) {  in bsg_add_device()
291 	bd->queue = rq;  in bsg_add_device()
293 	refcount_set(&bd->ref_count, 1);  in bsg_add_device()
294 	hlist_add_head(&bd->dev_list, bsg_dev_idx_hash(iminor(inode)));  in bsg_add_device()
296 	strncpy(bd->name, dev_name(rq->bsg_dev.class_dev), sizeof(bd->name) - 1);  in bsg_add_device()
297 	bsg_dbg(bd, "bound to <%s>, max queue %d\n",  in bsg_add_device()
298 		format_dev_t(buf, inode->i_rdev), bd->max_queue);  in bsg_add_device()
300 	return bd;  in bsg_add_device()
305 	struct bsg_device *bd;  in __bsg_get_device()  local
309 	hlist_for_each_entry(bd, bsg_dev_idx_hash(minor), dev_list) {  in __bsg_get_device()
310 		if (bd->queue == q) {  in __bsg_get_device()
311 			refcount_inc(&bd->ref_count);  in __bsg_get_device()
315 	bd = NULL;  in __bsg_get_device()
317 	return bd;  in __bsg_get_device()
322 	struct bsg_device *bd;  in bsg_get_device()  local
332 		bd = ERR_PTR(-ENODEV);  in bsg_get_device()
336 	bd = __bsg_get_device(iminor(inode), bcd->queue);  in bsg_get_device()
337 	if (!bd)  in bsg_get_device()
338 		bd = bsg_add_device(inode, bcd->queue, file);  in bsg_get_device()
342 	return bd;  in bsg_get_device()
347 	struct bsg_device *bd;  in bsg_open()  local
349 	bd = bsg_get_device(inode, file);  in bsg_open()
351 	if (IS_ERR(bd))  in bsg_open()
352 		return PTR_ERR(bd);  in bsg_open()
354 	file->private_data = bd;  in bsg_open()
360 	struct bsg_device *bd = file->private_data;  in bsg_release()  local
363 	return bsg_put_device(bd);  in bsg_release()
368 	struct bsg_device *bd = file->private_data;  in bsg_ioctl()  local
377 		return put_user(bd->max_queue, uarg);  in bsg_ioctl()
386 		spin_lock_irq(&bd->lock);  in bsg_ioctl()
387 		bd->max_queue = queue;  in bsg_ioctl()
388 		spin_unlock_irq(&bd->lock);  in bsg_ioctl()
405 		return scsi_cmd_ioctl(bd->queue, NULL, file->f_mode, cmd, uarg);  in bsg_ioctl()
416 		rq = bsg_map_hdr(bd->queue, &hdr, file->f_mode);  in bsg_ioctl()
425 		blk_execute_rq(bd->queue, NULL, rq, at_head);  in bsg_ioctl()