26 #define bsg_dbg(bd, fmt, ...) \  argument
27 	pr_debug("%s: " fmt, (bd)->name, ##__VA_ARGS__)
200 	struct bsg_device *bd;  in bsg_alloc_device()  local
202 	bd = kzalloc(sizeof(struct bsg_device), GFP_KERNEL);  in bsg_alloc_device()
203 	if (unlikely(!bd))  in bsg_alloc_device()
206 	spin_lock_init(&bd->lock);  in bsg_alloc_device()
207 	bd->max_queue = BSG_DEFAULT_CMDS;  in bsg_alloc_device()
208 	INIT_HLIST_NODE(&bd->dev_list);  in bsg_alloc_device()
209 	return bd;  in bsg_alloc_device()
212 static int bsg_put_device(struct bsg_device *bd)  in bsg_put_device()  argument
214 	struct request_queue *q = bd->queue;  in bsg_put_device()
218 	if (!refcount_dec_and_test(&bd->ref_count)) {  in bsg_put_device()
223 	hlist_del(&bd->dev_list);  in bsg_put_device()
226 	bsg_dbg(bd, "tearing down\n");  in bsg_put_device()
231 	kfree(bd);  in bsg_put_device()
240 	struct bsg_device *bd;  in bsg_add_device()  local
248 	bd = bsg_alloc_device();  in bsg_add_device()
249 	if (!bd) {  in bsg_add_device()
254 	bd->queue = rq;  in bsg_add_device()
256 	refcount_set(&bd->ref_count, 1);  in bsg_add_device()
257 	hlist_add_head(&bd->dev_list, bsg_dev_idx_hash(iminor(inode)));  in bsg_add_device()
259 	strncpy(bd->name, dev_name(rq->bsg_dev.class_dev), sizeof(bd->name) - 1);  in bsg_add_device()
260 	bsg_dbg(bd, "bound to <%s>, max queue %d\n",  in bsg_add_device()
261 		format_dev_t(buf, inode->i_rdev), bd->max_queue);  in bsg_add_device()
263 	return bd;  in bsg_add_device()
268 	struct bsg_device *bd;  in __bsg_get_device()  local
272 	hlist_for_each_entry(bd, bsg_dev_idx_hash(minor), dev_list) {  in __bsg_get_device()
273 		if (bd->queue == q) {  in __bsg_get_device()
274 			refcount_inc(&bd->ref_count);  in __bsg_get_device()
278 	bd = NULL;  in __bsg_get_device()
280 	return bd;  in __bsg_get_device()
285 	struct bsg_device *bd;  in bsg_get_device()  local
295 		bd = ERR_PTR(-ENODEV);  in bsg_get_device()
299 	bd = __bsg_get_device(iminor(inode), bcd->queue);  in bsg_get_device()
300 	if (!bd)  in bsg_get_device()
301 		bd = bsg_add_device(inode, bcd->queue, file);  in bsg_get_device()
305 	return bd;  in bsg_get_device()
310 	struct bsg_device *bd;  in bsg_open()  local
312 	bd = bsg_get_device(inode, file);  in bsg_open()
314 	if (IS_ERR(bd))  in bsg_open()
315 		return PTR_ERR(bd);  in bsg_open()
317 	file->private_data = bd;  in bsg_open()
323 	struct bsg_device *bd = file->private_data;  in bsg_release()  local
326 	return bsg_put_device(bd);  in bsg_release()
329 static int bsg_get_command_q(struct bsg_device *bd, int __user *uarg)  in bsg_get_command_q()  argument
331 	return put_user(bd->max_queue, uarg);  in bsg_get_command_q()
334 static int bsg_set_command_q(struct bsg_device *bd, int __user *uarg)  in bsg_set_command_q()  argument
343 	spin_lock_irq(&bd->lock);  in bsg_set_command_q()
344 	bd->max_queue = queue;  in bsg_set_command_q()
345 	spin_unlock_irq(&bd->lock);  in bsg_set_command_q()
351 	struct bsg_device *bd = file->private_data;  in bsg_ioctl()  local
359 		return bsg_get_command_q(bd, uarg);  in bsg_ioctl()
361 		return bsg_set_command_q(bd, uarg);  in bsg_ioctl()
374 		return scsi_cmd_ioctl(bd->queue, NULL, file->f_mode, cmd, uarg);  in bsg_ioctl()
376 		return bsg_sg_io(bd->queue, file->f_mode, uarg);  in bsg_ioctl()