[PATCH] i2c: Optimize core_lists mutex usage
Stop holding the core_lists mutex when we don't actually need it.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 975cb64..45e2cdf 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -288,9 +288,7 @@
{
struct list_head *item;
struct i2c_adapter *adapter;
- int res = 0;
-
- mutex_lock(&core_lists);
+ int res;
/* add the driver to the list of i2c drivers in the driver core */
driver->driver.owner = owner;
@@ -298,8 +296,10 @@
res = driver_register(&driver->driver);
if (res)
- goto out_unlock;
+ return res;
+ mutex_lock(&core_lists);
+
list_add_tail(&driver->list,&drivers);
pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name);
@@ -311,9 +311,8 @@
}
}
- out_unlock:
mutex_unlock(&core_lists);
- return res;
+ return 0;
}
EXPORT_SYMBOL(i2c_register_driver);