From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/media/dvbdev.h | 57 ++++++++++++++++++++++++++++++++++++++-------------------
1 files changed, 38 insertions(+), 19 deletions(-)
diff --git a/kernel/include/media/dvbdev.h b/kernel/include/media/dvbdev.h
index 881ca46..91ff2d5 100644
--- a/kernel/include/media/dvbdev.h
+++ b/kernel/include/media/dvbdev.h
@@ -86,8 +86,8 @@
* @priv: private data
* @device: pointer to struct device
* @module: pointer to struct module
- * @mfe_shared: mfe shared: indicates mutually exclusive frontends
- * Thie usage of this flag is currently deprecated
+ * @mfe_shared: indicates mutually exclusive frontends.
+ * Use of this flag is currently deprecated.
* @mfe_dvbdev: Frontend device in use, in the case of MFE
* @mfe_lock: Lock to prevent using the other frontends when MFE is
* used.
@@ -126,6 +126,7 @@
* struct dvb_device - represents a DVB device node
*
* @list_head: List head with all DVB devices
+ * @ref: reference counter
* @fops: pointer to struct file_operations
* @adapter: pointer to the adapter that holds this device node
* @type: type of the device, as defined by &enum dvb_device_type.
@@ -156,6 +157,7 @@
*/
struct dvb_device {
struct list_head list_head;
+ struct kref ref;
const struct file_operations *fops;
struct dvb_adapter *adapter;
enum dvb_device_type type;
@@ -186,6 +188,35 @@
void *priv;
};
+
+/**
+ * struct dvbdevfops_node - fops nodes registered in dvbdevfops_list
+ *
+ * @fops: Dynamically allocated fops for ->owner registration
+ * @type: type of dvb_device
+ * @template: dvb_device used for registration
+ * @list_head: list_head for dvbdevfops_list
+ */
+struct dvbdevfops_node {
+ struct file_operations *fops;
+ enum dvb_device_type type;
+ const struct dvb_device *template;
+ struct list_head list_head;
+};
+
+/**
+ * dvb_device_get - Increase dvb_device reference
+ *
+ * @dvbdev: pointer to struct dvb_device
+ */
+struct dvb_device *dvb_device_get(struct dvb_device *dvbdev);
+
+/**
+ * dvb_device_put - Decrease dvb_device reference
+ *
+ * @dvbdev: pointer to struct dvb_device
+ */
+void dvb_device_put(struct dvb_device *dvbdev);
/**
* dvb_register_adapter - Registers a new DVB adapter
@@ -231,28 +262,16 @@
/**
* dvb_remove_device - Remove a registered DVB device
*
- * This does not free memory. To do that, call dvb_free_device().
+ * This does not free memory. dvb_free_device() will do that when
+ * reference counter is empty
*
* @dvbdev: pointer to struct dvb_device
*/
void dvb_remove_device(struct dvb_device *dvbdev);
-/**
- * dvb_free_device - Free memory occupied by a DVB device.
- *
- * Call dvb_unregister_device() before calling this function.
- *
- * @dvbdev: pointer to struct dvb_device
- */
-void dvb_free_device(struct dvb_device *dvbdev);
/**
* dvb_unregister_device - Unregisters a DVB device
- *
- * This is a combination of dvb_remove_device() and dvb_free_device().
- * Using this function is usually a mistake, and is often an indicator
- * for a use-after-free bug (when a userspace process keeps a file
- * handle to a detached device).
*
* @dvbdev: pointer to struct dvb_device
*/
@@ -293,8 +312,8 @@
*
* @adap: pointer to &struct dvb_adapter
*/
-static inline struct media_device
-*dvb_get_media_controller(struct dvb_adapter *adap)
+static inline struct media_device *
+dvb_get_media_controller(struct dvb_adapter *adap)
{
return adap->mdev;
}
@@ -385,7 +404,7 @@
* with dvb_module_probe() should use dvb_module_release() to unbind.
*
* Return:
- * On success, return an &struct i2c_client, pointing the the bound
+ * On success, return an &struct i2c_client, pointing to the bound
* I2C device. %NULL otherwise.
*
* .. note::
--
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