disable pwm7

hc

2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a

 kernel/include/media/dvbdev.h
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@@ -126,6 +126,7 @@
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  * struct dvb_device - represents a DVB device node
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  *
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  * @list_head:	List head with all DVB devices
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+ * @ref:	reference counter
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  * @fops:	pointer to struct file_operations
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  * @adapter:	pointer to the adapter that holds this device node
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  * @type:	type of the device, as defined by &enum dvb_device_type.
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@@ -156,6 +157,7 @@
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  */
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 struct dvb_device {
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 	struct list_head list_head;
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+	struct kref ref;
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 	const struct file_operations *fops;
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 	struct dvb_adapter *adapter;
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 	enum dvb_device_type type;
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@@ -186,6 +188,35 @@
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 	void *priv;
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 };
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+
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+/**
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+ * struct dvbdevfops_node - fops nodes registered in dvbdevfops_list
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+ *
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+ * @fops:		Dynamically allocated fops for ->owner registration
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+ * @type:		type of dvb_device
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+ * @template:		dvb_device used for registration
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+ * @list_head:		list_head for dvbdevfops_list
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+ */
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+struct dvbdevfops_node {
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+	struct file_operations *fops;
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+	enum dvb_device_type type;
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+	const struct dvb_device *template;
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+	struct list_head list_head;
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+};
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+
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+/**
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+ * dvb_device_get - Increase dvb_device reference
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+ *
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+ * @dvbdev:	pointer to struct dvb_device
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+ */
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+struct dvb_device *dvb_device_get(struct dvb_device *dvbdev);
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+
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+/**
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+ * dvb_device_put - Decrease dvb_device reference
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+ *
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+ * @dvbdev:	pointer to struct dvb_device
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+ */
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+void dvb_device_put(struct dvb_device *dvbdev);
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 /**
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  * dvb_register_adapter - Registers a new DVB adapter
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@@ -231,28 +262,16 @@
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 /**
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  * dvb_remove_device - Remove a registered DVB device
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  *
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- * This does not free memory.  To do that, call dvb_free_device().
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+ * This does not free memory. dvb_free_device() will do that when
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+ * reference counter is empty
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  *
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  * @dvbdev:	pointer to struct dvb_device
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  */
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 void dvb_remove_device(struct dvb_device *dvbdev);
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-/**
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- * dvb_free_device - Free memory occupied by a DVB device.
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- *
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- * Call dvb_unregister_device() before calling this function.
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- *
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- * @dvbdev:	pointer to struct dvb_device
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- */
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-void dvb_free_device(struct dvb_device *dvbdev);
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 /**
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  * dvb_unregister_device - Unregisters a DVB device
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- *
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- * This is a combination of dvb_remove_device() and dvb_free_device().
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- * Using this function is usually a mistake, and is often an indicator
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- * for a use-after-free bug (when a userspace process keeps a file
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- * handle to a detached device).
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  *
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  * @dvbdev:	pointer to struct dvb_device
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  */