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i2c: Refactor for_each callbacks

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Functions i2c_do_add_adapter() and __attach_adapter() do essentially
the same thing, differing only in how the parameters are passed. Same
for i2c_do_add_adapter() and __detach_adapter(). Introduce wrappers to
normalize the parameters, so that we do not have to duplicate the
code.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Jean Delvare 2009-12-06 17:06:27 +01:00
parent 7e2193a8f9
commit 69b0089a67
1 changed files with 22 additions and 48 deletions
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70
drivers/i2c/i2c-core.c
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@ -558,11 +558,9 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter)
up_read(&__i2c_board_lock);
}
static int i2c_do_add_adapter(struct device_driver *d, void *data)
static int i2c_do_add_adapter(struct i2c_driver *driver,
struct i2c_adapter *adap)
{
struct i2c_driver *driver = to_i2c_driver(d);
struct i2c_adapter *adap = data;
/* Detect supported devices on that bus, and instantiate them */
i2c_detect(adap, driver);
@ -574,6 +572,11 @@ static int i2c_do_add_adapter(struct device_driver *d, void *data)
return 0;
}
static int __process_new_adapter(struct device_driver *d, void *data)
{
return i2c_do_add_adapter(to_i2c_driver(d), data);
}
static int i2c_register_adapter(struct i2c_adapter *adap)
{
int res = 0, dummy;
@ -614,7 +617,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
/* Notify drivers */
mutex_lock(&core_lock);
dummy = bus_for_each_drv(&i2c_bus_type, NULL, adap,
i2c_do_add_adapter);
__process_new_adapter);
mutex_unlock(&core_lock);
return 0;
@ -715,10 +718,9 @@ retry:
}
EXPORT_SYMBOL_GPL(i2c_add_numbered_adapter);
static int i2c_do_del_adapter(struct device_driver *d, void *data)
static int i2c_do_del_adapter(struct i2c_driver *driver,
struct i2c_adapter *adapter)
{
struct i2c_driver *driver = to_i2c_driver(d);
struct i2c_adapter *adapter = data;
struct i2c_client *client, *_n;
int res;
@ -750,6 +752,11 @@ static int __unregister_client(struct device *dev, void *dummy)
return 0;
}
static int __process_removed_adapter(struct device_driver *d, void *data)
{
return i2c_do_del_adapter(to_i2c_driver(d), data);
}
/**
* i2c_del_adapter - unregister I2C adapter
* @adap: the adapter being unregistered
@ -777,7 +784,7 @@ int i2c_del_adapter(struct i2c_adapter *adap)
/* Tell drivers about this removal */
mutex_lock(&core_lock);
res = bus_for_each_drv(&i2c_bus_type, NULL, adap,
i2c_do_del_adapter);
__process_removed_adapter);
mutex_unlock(&core_lock);
if (res)
return res;
@ -826,22 +833,11 @@ EXPORT_SYMBOL(i2c_del_adapter);
/* ------------------------------------------------------------------------- */
static int __attach_adapter(struct device *dev, void *data)
static int __process_new_driver(struct device *dev, void *data)
{
struct i2c_adapter *adapter;
struct i2c_driver *driver = data;
if (dev->type != &i2c_adapter_type)
return 0;
adapter = to_i2c_adapter(dev);
i2c_detect(adapter, driver);
/* Legacy drivers scan i2c busses directly */
if (driver->attach_adapter)
driver->attach_adapter(adapter);
return 0;
return i2c_do_add_adapter(data, to_i2c_adapter(dev));
}
/*
@ -873,40 +869,18 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
INIT_LIST_HEAD(&driver->clients);
/* Walk the adapters that are already present */
mutex_lock(&core_lock);
bus_for_each_dev(&i2c_bus_type, NULL, driver, __attach_adapter);
bus_for_each_dev(&i2c_bus_type, NULL, driver, __process_new_driver);
mutex_unlock(&core_lock);
return 0;
}
EXPORT_SYMBOL(i2c_register_driver);
static int __detach_adapter(struct device *dev, void *data)
static int __process_removed_driver(struct device *dev, void *data)
{
struct i2c_adapter *adapter;
struct i2c_driver *driver = data;
struct i2c_client *client, *_n;
if (dev->type != &i2c_adapter_type)
return 0;
adapter = to_i2c_adapter(dev);
/* Remove the devices we created ourselves as the result of hardware
* probing (using a driver's detect method) */
list_for_each_entry_safe(client, _n, &driver->clients, detected) {
dev_dbg(&adapter->dev, "Removing %s at 0x%x\n",
client->name, client->addr);
list_del(&client->detected);
i2c_unregister_device(client);
}
if (driver->detach_adapter) {
if (driver->detach_adapter(adapter))
dev_err(&adapter->dev,
"detach_adapter failed for driver [%s]\n",
driver->driver.name);
}
return 0;
return i2c_do_del_adapter(data, to_i2c_adapter(dev));
}
/**
@ -917,7 +891,7 @@ static int __detach_adapter(struct device *dev, void *data)
void i2c_del_driver(struct i2c_driver *driver)
{
mutex_lock(&core_lock);
bus_for_each_dev(&i2c_bus_type, NULL, driver, __detach_adapter);
bus_for_each_dev(&i2c_bus_type, NULL, driver, __process_removed_driver);
mutex_unlock(&core_lock);
driver_unregister(&driver->driver);