99 static void port_subs_info_init(struct snd_seq_port_subs_info *grp)  in port_subs_info_init()  argument
101 	INIT_LIST_HEAD(&grp->list_head);  in port_subs_info_init()
102 	grp->count = 0;  in port_subs_info_init()
103 	grp->exclusive = 0;  in port_subs_info_init()
104 	rwlock_init(&grp->list_lock);  in port_subs_info_init()
105 	init_rwsem(&grp->list_mutex);  in port_subs_info_init()
106 	grp->open = NULL;  in port_subs_info_init()
107 	grp->close = NULL;  in port_subs_info_init()
170 			  struct snd_seq_port_subs_info *grp,
174 			    struct snd_seq_port_subs_info *grp,
214 				  struct snd_seq_port_subs_info *grp,  in clear_subscriber_list()  argument
219 	list_for_each_safe(p, n, &grp->list_head) {  in clear_subscriber_list()
428 			  struct snd_seq_port_subs_info *grp,  in subscribe_port()  argument
436 	grp->count++;  in subscribe_port()
437 	if (grp->open && grp->count == 1) {  in subscribe_port()
438 		err = grp->open(port->private_data, info);  in subscribe_port()
441 			grp->count--;  in subscribe_port()
453 			    struct snd_seq_port_subs_info *grp,  in unsubscribe_port()  argument
459 	if (! grp->count)  in unsubscribe_port()
461 	grp->count--;  in unsubscribe_port()
462 	if (grp->close && grp->count == 0)  in unsubscribe_port()
463 		err = grp->close(port->private_data, info);  in unsubscribe_port()
499 	struct snd_seq_port_subs_info *grp;  in check_and_subscribe_port()  local
504 	grp = is_src ? &port->c_src : &port->c_dest;  in check_and_subscribe_port()
505 	guard(rwsem_write)(&grp->list_mutex);  in check_and_subscribe_port()
507 		if (!list_empty(&grp->list_head))  in check_and_subscribe_port()
510 		if (grp->exclusive)  in check_and_subscribe_port()
513 		list_for_each(p, &grp->list_head) {  in check_and_subscribe_port()
520 	err = subscribe_port(client, port, grp, &subs->info, ack);  in check_and_subscribe_port()
522 		grp->exclusive = 0;  in check_and_subscribe_port()
527 	guard(write_lock_irq)(&grp->list_lock);  in check_and_subscribe_port()
529 		list_add_tail(&subs->src_list, &grp->list_head);  in check_and_subscribe_port()
531 		list_add_tail(&subs->dest_list, &grp->list_head);  in check_and_subscribe_port()
532 	grp->exclusive = exclusive;  in check_and_subscribe_port()
538 /* called with grp->list_mutex held */
544 	struct snd_seq_port_subs_info *grp;  in __delete_and_unsubscribe_port()  local
548 	grp = is_src ? &port->c_src : &port->c_dest;  in __delete_and_unsubscribe_port()
550 	scoped_guard(write_lock_irq, &grp->list_lock) {  in __delete_and_unsubscribe_port()
554 		grp->exclusive = 0;  in __delete_and_unsubscribe_port()
558 		unsubscribe_port(client, port, grp, &subs->info, ack);  in __delete_and_unsubscribe_port()
566 	struct snd_seq_port_subs_info *grp;  in delete_and_unsubscribe_port()  local
568 	grp = is_src ? &port->c_src : &port->c_dest;  in delete_and_unsubscribe_port()
569 	guard(rwsem_write)(&grp->list_mutex);  in delete_and_unsubscribe_port()