i2c: Make i2c_del_driver a void function

Make i2c_del_driver a void function, like all other driver removal
functions. It always returned 0 even when errors occured, and nobody
ever actually checked the return value anyway. And we cannot fail
a module removal anyway.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

4 files changed, 7 insertions, 15 deletions

diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients
index e62fbfa1282d..f7e04ec849b1 100644
--- a/Documentation/i2c/writing-clients
+++ b/Documentation/i2c/writing-clients
@@ -586,10 +586,7 @@ the driver module is usually enough.
   void foo_cleanup(void)
   {
     if (foo_initialized == 1) {
-      if ((res = i2c_del_driver(&foo_driver))) {
-        printk("foo: Driver registration failed, module not removed.\n");
-        return;
-      }
+      i2c_del_driver(&foo_driver);
       foo_initialized --;
     }
   }
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 0fd4acbffb78..a58f89a6418a 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -599,14 +599,12 @@ EXPORT_SYMBOL(i2c_register_driver);
  * i2c_del_driver - unregister I2C driver
  * @driver: the driver being unregistered
  */
-int i2c_del_driver(struct i2c_driver *driver)
+void i2c_del_driver(struct i2c_driver *driver)
 {
         struct list_head   *item1, *item2, *_n;
         struct i2c_client  *client;
         struct i2c_adapter *adap;
 
-        int res = 0;
-
         mutex_lock(&core_lists);
 
         /* new-style driver? */
@@ -620,11 +618,10 @@ int i2c_del_driver(struct i2c_driver *driver)
         list_for_each(item1,&adapters) {
                 adap = list_entry(item1, struct i2c_adapter, list);
                 if (driver->detach_adapter) {
-                        if ((res = driver->detach_adapter(adap))) {
+                        if (driver->detach_adapter(adap)) {
                                 dev_err(&adap->dev, "detach_adapter failed "
                                         "for driver [%s]\n",
                                         driver->driver.name);
-                                goto out_unlock;
                         }
                 } else {
                         list_for_each_safe(item2, _n, &adap->clients) {
@@ -634,12 +631,11 @@ int i2c_del_driver(struct i2c_driver *driver)
                                 dev_dbg(&adap->dev, "detaching client [%s] "
                                         "at 0x%02x\n", client->name,
                                         client->addr);
-                                if ((res = driver->detach_client(client))) {
+                                if (driver->detach_client(client)) {
                                         dev_err(&adap->dev, "detach_client "
                                                 "failed for client [%s] at "
                                                 "0x%02x\n", client->name,
                                                 client->addr);
-                                        goto out_unlock;
                                 }
                         }
                 }
@@ -650,9 +646,7 @@ int i2c_del_driver(struct i2c_driver *driver)
         list_del(&driver->list);
         pr_debug("i2c-core: driver [%s] unregistered\n", driver->driver.name);
 
- out_unlock:
         mutex_unlock(&core_lists);
-        return 0;
 }
 EXPORT_SYMBOL(i2c_del_driver);
 
diff --git a/drivers/macintosh/therm_windtunnel.c b/drivers/macintosh/therm_windtunnel.c
index 35233de460ad..3d0354e96a97 100644
--- a/drivers/macintosh/therm_windtunnel.c
+++ b/drivers/macintosh/therm_windtunnel.c
@@ -459,7 +459,8 @@ therm_of_probe( struct of_device *dev, const struct of_device_id *match )
 static int
 therm_of_remove( struct of_device *dev )
 {
-        return i2c_del_driver( &g4fan_driver );
+        i2c_del_driver( &g4fan_driver );
+        return 0;
 }
 
 static struct of_device_id therm_of_match[] = {{
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 3af7111c6680..3fe2ad37da30 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -371,7 +371,7 @@ extern int i2c_del_adapter(struct i2c_adapter *);
 extern int i2c_add_numbered_adapter(struct i2c_adapter *);
 
 extern int i2c_register_driver(struct module *, struct i2c_driver *);
-extern int i2c_del_driver(struct i2c_driver *);
+extern void i2c_del_driver(struct i2c_driver *);
 
 static inline int i2c_add_driver(struct i2c_driver *driver)
 {