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Commit 7f101a97 authored by Dave Young's avatar Dave Young Committed by Jean Delvare
Browse files

i2c: Use class_for_each_device 



Use class_for_each_device for iteration.

Signed-off-by: default avatarDave Young <hidave.darkstar@gmail.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent bce7f793

drivers/i2c/i2c-core.c

+48 −44
Original line number Diff line number Diff line
@@ -35,7 +35,6 @@ 
#include <linux/completion.h>

#include <linux/hardirq.h>

#include <linux/irqflags.h>

#include <linux/semaphore.h>

#include <asm/uaccess.h>



#include "i2c-core.h"
@@ -646,6 +645,16 @@ EXPORT_SYMBOL(i2c_del_adapter); 


/* ------------------------------------------------------------------------- */



static int __attach_adapter(struct device *dev, void *data)

{

	struct i2c_adapter *adapter = to_i2c_adapter(dev);

	struct i2c_driver *driver = data;



	driver->attach_adapter(adapter);



	return 0;

}



/*

 * An i2c_driver is used with one or more i2c_client (device) nodes to access

 * i2c slave chips, on a bus instance associated with some i2c_adapter.  There
@@ -686,69 +695,64 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) 
	pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name);



	/* legacy drivers scan i2c busses directly */

	if (driver->attach_adapter) {

		struct i2c_adapter *adapter;



		down(&i2c_adapter_class.sem);

		list_for_each_entry(adapter, &i2c_adapter_class.devices,

				    dev.node) {

			driver->attach_adapter(adapter);

		}

		up(&i2c_adapter_class.sem);

	}

	if (driver->attach_adapter)

		class_for_each_device(&i2c_adapter_class, driver,

				      __attach_adapter);



	mutex_unlock(&core_lock);

	return 0;

}

EXPORT_SYMBOL(i2c_register_driver);



/**

 * i2c_del_driver - unregister I2C driver

 * @driver: the driver being unregistered

 * Context: can sleep

 */

void i2c_del_driver(struct i2c_driver *driver)

static int __detach_adapter(struct device *dev, void *data)

{

	struct list_head   *item2, *_n;

	struct i2c_client  *client;

	struct i2c_adapter *adap;



	mutex_lock(&core_lock);



	/* new-style driver? */

	if (is_newstyle_driver(driver))

		goto unregister;

	struct i2c_adapter *adapter = to_i2c_adapter(dev);

	struct i2c_driver *driver = data;



	/* Have a look at each adapter, if clients of this driver are still

	 * attached. If so, detach them to be able to kill the driver

	 * afterwards.

	 */

	down(&i2c_adapter_class.sem);

	list_for_each_entry(adap, &i2c_adapter_class.devices, dev.node) {

	if (driver->detach_adapter) {

			if (driver->detach_adapter(adap)) {

				dev_err(&adap->dev, "detach_adapter failed "

					"for driver [%s]\n",

		if (driver->detach_adapter(adapter))

			dev_err(&adapter->dev,

				"detach_adapter failed for driver [%s]\n",

				driver->driver.name);

			}

	} else {

			list_for_each_safe(item2, _n, &adap->clients) {

				client = list_entry(item2, struct i2c_client, list);

		struct list_head *item, *_n;

		struct i2c_client *client;



		list_for_each_safe(item, _n, &adapter->clients) {

			client = list_entry(item, struct i2c_client, list);

			if (client->driver != driver)

				continue;

				dev_dbg(&adap->dev, "detaching client [%s] "

					"at 0x%02x\n", client->name,

					client->addr);

				if (driver->detach_client(client)) {

					dev_err(&adap->dev, "detach_client "

						"failed for client [%s] at "

						"0x%02x\n", client->name,

						client->addr);

				}

			dev_dbg(&adapter->dev,

				"detaching client [%s] at 0x%02x\n",

				client->name, client->addr);

			if (driver->detach_client(client))

				dev_err(&adapter->dev, "detach_client "

					"failed for client [%s] at 0x%02x\n",

					client->name, client->addr);

		}

	}



	return 0;

}

	up(&i2c_adapter_class.sem);



/**

 * i2c_del_driver - unregister I2C driver

 * @driver: the driver being unregistered

 * Context: can sleep

 */

void i2c_del_driver(struct i2c_driver *driver)

{

	mutex_lock(&core_lock);



	/* new-style driver? */

	if (is_newstyle_driver(driver))

		goto unregister;



	class_for_each_device(&i2c_adapter_class, driver, __detach_adapter);



 unregister:

	driver_unregister(&driver->driver);