102 static void port_subs_info_init(struct snd_seq_port_subs_info *grp)  in port_subs_info_init()  argument
104 	INIT_LIST_HEAD(&grp->list_head);  in port_subs_info_init()
105 	grp->count = 0;  in port_subs_info_init()
106 	grp->exclusive = 0;  in port_subs_info_init()
107 	rwlock_init(&grp->list_lock);  in port_subs_info_init()
108 	init_rwsem(&grp->list_mutex);  in port_subs_info_init()
109 	grp->open = NULL;  in port_subs_info_init()
110 	grp->close = NULL;  in port_subs_info_init()
177 			  struct snd_seq_port_subs_info *grp,
181 			    struct snd_seq_port_subs_info *grp,
221 				  struct snd_seq_port_subs_info *grp,  in clear_subscriber_list()  argument
226 	list_for_each_safe(p, n, &grp->list_head) {  in clear_subscriber_list()
432 			  struct snd_seq_port_subs_info *grp,  in subscribe_port()  argument
440 	grp->count++;  in subscribe_port()
441 	if (grp->open && grp->count == 1) {  in subscribe_port()
442 		err = grp->open(port->private_data, info);  in subscribe_port()
445 			grp->count--;  in subscribe_port()
457 			    struct snd_seq_port_subs_info *grp,  in unsubscribe_port()  argument
463 	if (! grp->count)  in unsubscribe_port()
465 	grp->count--;  in unsubscribe_port()
466 	if (grp->close && grp->count == 0)  in unsubscribe_port()
467 		err = grp->close(port->private_data, info);  in unsubscribe_port()
503 	struct snd_seq_port_subs_info *grp;  in check_and_subscribe_port()  local
508 	grp = is_src ? &port->c_src : &port->c_dest;  in check_and_subscribe_port()
510 	down_write(&grp->list_mutex);  in check_and_subscribe_port()
512 		if (!list_empty(&grp->list_head))  in check_and_subscribe_port()
515 		if (grp->exclusive)  in check_and_subscribe_port()
518 		list_for_each(p, &grp->list_head) {  in check_and_subscribe_port()
525 	err = subscribe_port(client, port, grp, &subs->info, ack);  in check_and_subscribe_port()
527 		grp->exclusive = 0;  in check_and_subscribe_port()
532 	write_lock_irq(&grp->list_lock);  in check_and_subscribe_port()
534 		list_add_tail(&subs->src_list, &grp->list_head);  in check_and_subscribe_port()
536 		list_add_tail(&subs->dest_list, &grp->list_head);  in check_and_subscribe_port()
537 	grp->exclusive = exclusive;  in check_and_subscribe_port()
539 	write_unlock_irq(&grp->list_lock);  in check_and_subscribe_port()
543 	up_write(&grp->list_mutex);  in check_and_subscribe_port()
553 	struct snd_seq_port_subs_info *grp;  in __delete_and_unsubscribe_port()  local
557 	grp = is_src ? &port->c_src : &port->c_dest;  in __delete_and_unsubscribe_port()
559 	write_lock_irq(&grp->list_lock);  in __delete_and_unsubscribe_port()
563 	grp->exclusive = 0;  in __delete_and_unsubscribe_port()
564 	write_unlock_irq(&grp->list_lock);  in __delete_and_unsubscribe_port()
567 		unsubscribe_port(client, port, grp, &subs->info, ack);  in __delete_and_unsubscribe_port()
575 	struct snd_seq_port_subs_info *grp;  in delete_and_unsubscribe_port()  local
577 	grp = is_src ? &port->c_src : &port->c_dest;  in delete_and_unsubscribe_port()
578 	down_write(&grp->list_mutex);  in delete_and_unsubscribe_port()
580 	up_write(&grp->list_mutex);  in delete_and_unsubscribe_port()