[PATCH 2/2] i2c: Kill the old driver matching scheme

[PATCH 2/2] i2c: Kill the old driver matching scheme

[Jean Delvare]

Remove the old driver_name/type scheme for i2c driver matching. Only the
standard aliasing model will be used from now on.

Signed-off-by: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
---
Testers are welcome.

 drivers/i2c/i2c-core.c |   22 +++++-----------------
 include/linux/i2c.h    |    7 +------
 2 files changed, 6 insertions(+), 23 deletions(-)

--- linux-2.6.26-rc2.orig/drivers/i2c/i2c-core.c	2008-05-13 22:39:48.000000000 +0200
+++ linux-2.6.26-rc2/drivers/i2c/i2c-core.c	2008-05-13 22:45:48.000000000 +0200
@@ -74,10 +74,7 @@ static int i2c_device_match(struct devic
 	if (driver->id_table)
 		return i2c_match_id(driver->id_table, client) != NULL;
 
-	/* new style drivers use the same kind of driver matching policy
-	 * as platform devices or SPI:  compare device and driver IDs.
-	 */
-	return strcmp(client->driver_name, drv->name) == 0;
+	return 0;
 }
 
 #ifdef	CONFIG_HOTPLUG
@@ -91,14 +88,9 @@ static int i2c_device_uevent(struct devi
 	if (dev->driver)
 		return 0;
 
-	if (client->driver_name[0]) {
-		if (add_uevent_var(env, "MODALIAS=%s", client->driver_name))
-			return -ENOMEM;
-	} else {
-		if (add_uevent_var(env, "MODALIAS=%s%s",
-				   I2C_MODULE_PREFIX, client->name))
-			return -ENOMEM;
-	}
+	if (add_uevent_var(env, "MODALIAS=%s%s",
+			   I2C_MODULE_PREFIX, client->name))
+		return -ENOMEM;
 	dev_dbg(dev, "uevent\n");
 	return 0;
 }
@@ -206,9 +198,7 @@ static ssize_t show_client_name(struct d
 static ssize_t show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct i2c_client *client = to_i2c_client(dev);
-	return client->driver_name[0]
-		? sprintf(buf, "%s\n", client->driver_name)
-		: sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name);
+	return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name);
 }
 
 static struct device_attribute i2c_dev_attrs[] = {
@@ -282,8 +272,6 @@ i2c_new_device(struct i2c_adapter *adap,
 	client->addr = info->addr;
 	client->irq = info->irq;
 
-	strlcpy(client->driver_name, info->driver_name,
-		sizeof(client->driver_name));
 	strlcpy(client->name, info->type, sizeof(client->name));
 
 	/* a new style driver may be bound to this device when we
--- linux-2.6.26-rc2.orig/include/linux/i2c.h	2008-05-13 22:39:48.000000000 +0200
+++ linux-2.6.26-rc2/include/linux/i2c.h	2008-05-13 22:45:48.000000000 +0200
@@ -155,8 +155,6 @@ 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)
- * @driver_name: Identifies new-style driver used with this device; also
- *	used as the module name for hotplug/coldplug modprobe support.
  * @list: list of active/busy clients (DEPRECATED)
  * @released: used to synchronize client releases & detaches and references
  *
@@ -174,7 +172,6 @@ struct i2c_client {
 	struct i2c_driver *driver;	/* and our access routines	*/
 	struct device dev;		/* the device structure		*/
 	int irq;			/* irq issued by device (or -1) */
-	char driver_name[KOBJ_NAME_LEN];
 	struct list_head list;		/* DEPRECATED */
 	struct completion released;
 };
@@ -200,8 +197,7 @@ static inline void i2c_set_clientdata (s
 
 /**
  * struct i2c_board_info - template for device creation
- * @driver_name: identifies the driver to be bound to the device
- * @type: optional chip type information, to initialize i2c_client.name
+ * @type: chip type, to initialize i2c_client.name
  * @flags: to initialize i2c_client.flags
  * @addr: stored in i2c_client.addr
  * @platform_data: stored in i2c_client.dev.platform_data
@@ -220,7 +216,6 @@ static inline void i2c_set_clientdata (s
  * with the adapter already known.
  */
 struct i2c_board_info {
-	char		driver_name[KOBJ_NAME_LEN];
 	char		type[I2C_NAME_SIZE];
 	unsigned short	flags;
 	unsigned short	addr;


-- 
Jean Delvare

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