21 void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)  in v4l2_fh_init()  argument
23 	fh->vdev = vdev;  in v4l2_fh_init()
25 	fh->ctrl_handler = vdev->ctrl_handler;  in v4l2_fh_init()
26 	INIT_LIST_HEAD(&fh->list);  in v4l2_fh_init()
27 	set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);  in v4l2_fh_init()
35 	fh->prio = V4L2_PRIORITY_UNSET;  in v4l2_fh_init()
36 	init_waitqueue_head(&fh->wait);  in v4l2_fh_init()
37 	INIT_LIST_HEAD(&fh->available);  in v4l2_fh_init()
38 	INIT_LIST_HEAD(&fh->subscribed);  in v4l2_fh_init()
39 	fh->sequence = -1;  in v4l2_fh_init()
40 	mutex_init(&fh->subscribe_lock);  in v4l2_fh_init()
44 void v4l2_fh_add(struct v4l2_fh *fh)  in v4l2_fh_add()  argument
48 	v4l2_prio_open(fh->vdev->prio, &fh->prio);  in v4l2_fh_add()
49 	spin_lock_irqsave(&fh->vdev->fh_lock, flags);  in v4l2_fh_add()
50 	list_add(&fh->list, &fh->vdev->fh_list);  in v4l2_fh_add()
51 	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);  in v4l2_fh_add()
58 	struct v4l2_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);  in v4l2_fh_open()  local
60 	filp->private_data = fh;  in v4l2_fh_open()
61 	if (fh == NULL)  in v4l2_fh_open()
63 	v4l2_fh_init(fh, vdev);  in v4l2_fh_open()
64 	v4l2_fh_add(fh);  in v4l2_fh_open()
69 void v4l2_fh_del(struct v4l2_fh *fh)  in v4l2_fh_del()  argument
73 	spin_lock_irqsave(&fh->vdev->fh_lock, flags);  in v4l2_fh_del()
74 	list_del_init(&fh->list);  in v4l2_fh_del()
75 	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);  in v4l2_fh_del()
76 	v4l2_prio_close(fh->vdev->prio, fh->prio);  in v4l2_fh_del()
80 void v4l2_fh_exit(struct v4l2_fh *fh)  in v4l2_fh_exit()  argument
82 	if (fh->vdev == NULL)  in v4l2_fh_exit()
84 	v4l_disable_media_source(fh->vdev);  in v4l2_fh_exit()
85 	v4l2_event_unsubscribe_all(fh);  in v4l2_fh_exit()
86 	mutex_destroy(&fh->subscribe_lock);  in v4l2_fh_exit()
87 	fh->vdev = NULL;  in v4l2_fh_exit()
93 	struct v4l2_fh *fh = filp->private_data;  in v4l2_fh_release()  local
95 	if (fh) {  in v4l2_fh_release()
96 		v4l2_fh_del(fh);  in v4l2_fh_release()
97 		v4l2_fh_exit(fh);  in v4l2_fh_release()
98 		kfree(fh);  in v4l2_fh_release()
105 int v4l2_fh_is_singular(struct v4l2_fh *fh)  in v4l2_fh_is_singular()  argument
110 	if (fh == NULL || fh->vdev == NULL)  in v4l2_fh_is_singular()
112 	spin_lock_irqsave(&fh->vdev->fh_lock, flags);  in v4l2_fh_is_singular()
113 	is_singular = list_is_singular(&fh->list);  in v4l2_fh_is_singular()
114 	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);  in v4l2_fh_is_singular()