cec/core/cec-core.c

54 int cec_get_device(struct cec_devnode *devnode)
58 	 * the devnode->lock held to prevent an open/unregister race:
60 	 * the devnode->registered check and get_device() calls, leading to
63 	mutex_lock(&devnode->lock);
68 	if (!devnode->registered) {
69 		mutex_unlock(&devnode->lock);
73 	get_device(&devnode->dev);
74 	mutex_unlock(&devnode->lock);
78 void cec_put_device(struct cec_devnode *devnode)
80 	put_device(&devnode->dev);
86 	struct cec_devnode *devnode = to_cec_devnode(cd);
90 	clear_bit(devnode->minor, cec_devnode_nums);
93 	cec_delete_adapter(to_cec_adapter(devnode));
113 static int __must_check cec_devnode_register(struct cec_devnode *devnode,
131 	devnode->minor = minor;
132 	devnode->dev.bus = &cec_bus_type;
133 	devnode->dev.devt = MKDEV(MAJOR(cec_dev_t), minor);
134 	devnode->dev.release = cec_devnode_release;
135 	dev_set_name(&devnode->dev, "cec%d", devnode->minor);
136 	device_initialize(&devnode->dev);
139 	cdev_init(&devnode->cdev, &cec_devnode_fops);
140 	devnode->cdev.owner = owner;
141 	kobject_set_name(&devnode->cdev.kobj, "cec%d", devnode->minor);
143 	devnode->registered = true;
144 	ret = cdev_device_add(&devnode->cdev, &devnode->dev);
146 		devnode->registered = false;
155 	clear_bit(devnode->minor, cec_devnode_nums);
171 	struct cec_devnode *devnode = &adap->devnode;
174 	mutex_lock(&devnode->lock);
176 	/* Check if devnode was never registered or already unregistered */
177 	if (!devnode->registered || devnode->unregistered) {
178 		mutex_unlock(&devnode->lock);
181 	devnode->registered = false;
182 	devnode->unregistered = true;
184 	mutex_lock(&devnode->lock_fhs);
185 	list_for_each_entry(fh, &devnode->fhs, list)
187 	mutex_unlock(&devnode->lock_fhs);
189 	mutex_unlock(&devnode->lock);
194 	// Disable the adapter (since adap->devnode.unregistered is true)
198 	cdev_device_del(&devnode->cdev, &devnode->dev);
199 	put_device(&devnode->dev);
289 	/* adap->devnode initialization */
290 	INIT_LIST_HEAD(&adap->devnode.fhs);
291 	mutex_init(&adap->devnode.lock_fhs);
292 	mutex_init(&adap->devnode.lock);
347 	adap->devnode.dev.parent = parent;
366 	res = cec_devnode_register(&adap->devnode, adap->owner);
376 	dev_set_drvdata(&adap->devnode.dev, adap);
381 	adap->cec_dir = debugfs_create_dir(dev_name(&adap->devnode.dev),
384 	debugfs_create_devm_seqfile(&adap->devnode.dev, "status", adap->cec_dir,