692 	struct lineevent_state *le = filep->private_data;  in lineevent_poll()  local
695 	poll_wait(filep, &le->wait, wait);  in lineevent_poll()
697 	if (!kfifo_is_empty(&le->events))  in lineevent_poll()
709 	struct lineevent_state *le = filep->private_data;  in lineevent_read()  local
717 		if (kfifo_is_empty(&le->events)) {  in lineevent_read()
721 			ret = wait_event_interruptible(le->wait,  in lineevent_read()
722 					!kfifo_is_empty(&le->events));  in lineevent_read()
727 		if (mutex_lock_interruptible(&le->read_lock))  in lineevent_read()
729 		ret = kfifo_to_user(&le->events, buf, count, &copied);  in lineevent_read()
730 		mutex_unlock(&le->read_lock);  in lineevent_read()
751 	struct lineevent_state *le = filep->private_data;  in lineevent_release()  local
752 	struct gpio_device *gdev = le->gdev;  in lineevent_release()
754 	free_irq(le->irq, le);  in lineevent_release()
755 	gpiod_free(le->desc);  in lineevent_release()
756 	kfree(le->label);  in lineevent_release()
757 	kfree(le);  in lineevent_release()
765 	struct lineevent_state *le = filep->private_data;  in lineevent_ioctl()  local
778 		val = gpiod_get_value_cansleep(le->desc);  in lineevent_ioctl()
813 	struct lineevent_state *le = p;  in lineevent_irq_thread()  local
820 	ge.timestamp = le->timestamp;  in lineevent_irq_thread()
821 	level = gpiod_get_value_cansleep(le->desc);  in lineevent_irq_thread()
823 	if (le->eflags & GPIOEVENT_REQUEST_RISING_EDGE  in lineevent_irq_thread()
824 	    && le->eflags & GPIOEVENT_REQUEST_FALLING_EDGE) {  in lineevent_irq_thread()
831 	} else if (le->eflags & GPIOEVENT_REQUEST_RISING_EDGE && level) {  in lineevent_irq_thread()
834 	} else if (le->eflags & GPIOEVENT_REQUEST_FALLING_EDGE && !level) {  in lineevent_irq_thread()
841 	ret = kfifo_put(&le->events, ge);  in lineevent_irq_thread()
843 		wake_up_poll(&le->wait, EPOLLIN);  in lineevent_irq_thread()
850 	struct lineevent_state *le = p;  in lineevent_irq_handler()  local
856 	le->timestamp = ktime_get_real_ns();  in lineevent_irq_handler()
864 	struct lineevent_state *le;  in lineevent_create()  local
877 	le = kzalloc(sizeof(*le), GFP_KERNEL);  in lineevent_create()
878 	if (!le)  in lineevent_create()
880 	le->gdev = gdev;  in lineevent_create()
886 		le->label = kstrdup(eventreq.consumer_label,  in lineevent_create()
888 		if (!le->label) {  in lineevent_create()
917 	ret = gpiod_request(desc, le->label);  in lineevent_create()
920 	le->desc = desc;  in lineevent_create()
921 	le->eflags = eflags;  in lineevent_create()
934 	le->irq = gpiod_to_irq(desc);  in lineevent_create()
935 	if (le->irq <= 0) {  in lineevent_create()
947 	INIT_KFIFO(le->events);  in lineevent_create()
948 	init_waitqueue_head(&le->wait);  in lineevent_create()
949 	mutex_init(&le->read_lock);  in lineevent_create()
952 	ret = request_threaded_irq(le->irq,  in lineevent_create()
956 			le->label,  in lineevent_create()
957 			le);  in lineevent_create()
969 				  le,  in lineevent_create()
994 	free_irq(le->irq, le);  in lineevent_create()
996 	gpiod_free(le->desc);  in lineevent_create()
998 	kfree(le->label);  in lineevent_create()
1000 	kfree(le);  in lineevent_create()