33 void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)  in v4l2_fh_init()  argument
35 	fh->vdev = vdev;  in v4l2_fh_init()
37 	fh->ctrl_handler = vdev->ctrl_handler;  in v4l2_fh_init()
38 	INIT_LIST_HEAD(&fh->list);  in v4l2_fh_init()
39 	set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);  in v4l2_fh_init()
47 	fh->prio = V4L2_PRIORITY_UNSET;  in v4l2_fh_init()
48 	init_waitqueue_head(&fh->wait);  in v4l2_fh_init()
49 	INIT_LIST_HEAD(&fh->available);  in v4l2_fh_init()
50 	INIT_LIST_HEAD(&fh->subscribed);  in v4l2_fh_init()
51 	fh->sequence = -1;  in v4l2_fh_init()
55 void v4l2_fh_add(struct v4l2_fh *fh)  in v4l2_fh_add()  argument
59 	v4l2_prio_open(fh->vdev->prio, &fh->prio);  in v4l2_fh_add()
60 	spin_lock_irqsave(&fh->vdev->fh_lock, flags);  in v4l2_fh_add()
61 	list_add(&fh->list, &fh->vdev->fh_list);  in v4l2_fh_add()
62 	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);  in v4l2_fh_add()
69 	struct v4l2_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);  in v4l2_fh_open()  local
71 	filp->private_data = fh;  in v4l2_fh_open()
72 	if (fh == NULL)  in v4l2_fh_open()
74 	v4l2_fh_init(fh, vdev);  in v4l2_fh_open()
75 	v4l2_fh_add(fh);  in v4l2_fh_open()
80 void v4l2_fh_del(struct v4l2_fh *fh)  in v4l2_fh_del()  argument
84 	spin_lock_irqsave(&fh->vdev->fh_lock, flags);  in v4l2_fh_del()
85 	list_del_init(&fh->list);  in v4l2_fh_del()
86 	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);  in v4l2_fh_del()
87 	v4l2_prio_close(fh->vdev->prio, fh->prio);  in v4l2_fh_del()
91 void v4l2_fh_exit(struct v4l2_fh *fh)  in v4l2_fh_exit()  argument
93 	if (fh->vdev == NULL)  in v4l2_fh_exit()
95 	v4l2_event_unsubscribe_all(fh);  in v4l2_fh_exit()
96 	fh->vdev = NULL;  in v4l2_fh_exit()
102 	struct v4l2_fh *fh = filp->private_data;  in v4l2_fh_release()  local
104 	if (fh) {  in v4l2_fh_release()
105 		v4l2_fh_del(fh);  in v4l2_fh_release()
106 		v4l2_fh_exit(fh);  in v4l2_fh_release()
107 		kfree(fh);  in v4l2_fh_release()
113 int v4l2_fh_is_singular(struct v4l2_fh *fh)  in v4l2_fh_is_singular()  argument
118 	if (fh == NULL || fh->vdev == NULL)  in v4l2_fh_is_singular()
120 	spin_lock_irqsave(&fh->vdev->fh_lock, flags);  in v4l2_fh_is_singular()
121 	is_singular = list_is_singular(&fh->list);  in v4l2_fh_is_singular()
122 	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);  in v4l2_fh_is_singular()