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authorJean Delvare <khali@linux-fr.org>2009-06-19 16:58:19 +0200
committerJean Delvare <khali@linux-fr.org>2009-06-19 16:58:19 +0200
commite549c2b54dd90a056d6824b885d438b7437874f0 (patch)
tree45da005101a1587c18b41f4ad572458e08b95099
parent1e40ac12dab22d98d0178e87364cf4e36862809c (diff)
i2c: Kill the redundant client list
We used to maintain our own per-adapter list of i2c clients, but this is redundant with what the driver core does, and no longer needed. Just drop the redundant list. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <dbrownell@users.sourceforge.net>
-rw-r--r--drivers/i2c/i2c-core.c28
-rw-r--r--include/linux/i2c.h4
2 files changed, 11 insertions, 21 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 95fb997b41e..b1fd00d9a5c 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -276,10 +276,6 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
if (status)
goto out_err;
- mutex_lock(&adap->clist_lock);
- list_add_tail(&client->list, &adap->clients);
- mutex_unlock(&adap->clist_lock);
-
dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",
client->name, dev_name(&client->dev));
@@ -301,12 +297,6 @@ EXPORT_SYMBOL_GPL(i2c_new_device);
*/
void i2c_unregister_device(struct i2c_client *client)
{
- struct i2c_adapter *adapter = client->adapter;
-
- mutex_lock(&adapter->clist_lock);
- list_del(&client->list);
- mutex_unlock(&adapter->clist_lock);
-
device_unregister(&client->dev);
}
EXPORT_SYMBOL_GPL(i2c_unregister_device);
@@ -432,8 +422,6 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
return -EAGAIN;
mutex_init(&adap->bus_lock);
- mutex_init(&adap->clist_lock);
- INIT_LIST_HEAD(&adap->clients);
mutex_lock(&core_lock);
@@ -583,6 +571,14 @@ static int i2c_do_del_adapter(struct device_driver *d, void *data)
return res;
}
+static int __unregister_client(struct device *dev, void *dummy)
+{
+ struct i2c_client *client = i2c_verify_client(dev);
+ if (client)
+ i2c_unregister_device(client);
+ return 0;
+}
+
/**
* i2c_del_adapter - unregister I2C adapter
* @adap: the adapter being unregistered
@@ -593,7 +589,6 @@ static int i2c_do_del_adapter(struct device_driver *d, void *data)
*/
int i2c_del_adapter(struct i2c_adapter *adap)
{
- struct i2c_client *client, *_n;
int res = 0;
mutex_lock(&core_lock);
@@ -612,10 +607,9 @@ int i2c_del_adapter(struct i2c_adapter *adap)
if (res)
goto out_unlock;
- /* Detach any active clients */
- list_for_each_entry_safe_reverse(client, _n, &adap->clients, list) {
- i2c_unregister_device(client);
- }
+ /* Detach any active clients. This can't fail, thus we do not
+ checking the returned value. */
+ res = device_for_each_child(&adap->dev, NULL, __unregister_client);
/* clean up the sysfs representation */
init_completion(&adap->dev_released);
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 28b27282496..5f8157610c6 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -178,7 +178,6 @@ struct i2c_driver {
* @driver: device's driver, hence pointer to access routines
* @dev: Driver model device node for the slave.
* @irq: indicates the IRQ generated by this device (if any)
- * @list: list of active/busy clients (DEPRECATED)
* @detected: member of an i2c_driver.clients list
*
* An i2c_client identifies a single device (i.e. chip) connected to an
@@ -195,7 +194,6 @@ struct i2c_client {
struct i2c_driver *driver; /* and our access routines */
struct device dev; /* the device structure */
int irq; /* irq issued by device */
- struct list_head list; /* DEPRECATED */
struct list_head detected;
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
@@ -339,14 +337,12 @@ struct i2c_adapter {
/* data fields that are valid for all devices */
u8 level; /* nesting level for lockdep */
struct mutex bus_lock;
- struct mutex clist_lock;
int timeout; /* in jiffies */
int retries;
struct device dev; /* the adapter device */
int nr;
- struct list_head clients; /* DEPRECATED */
char name[48];
struct completion dev_released;
};