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[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>
wifi-calibration
Jean Delvare 2006-02-05 23:28:21 +01:00 committed by Greg Kroah-Hartman
parent fabddcd49d
commit 7eebcb7c0f
1 changed files with 5 additions and 6 deletions
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11
drivers/i2c/i2c-core.c
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@ -288,9 +288,7 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
{ {
struct list_head *item; struct list_head *item;
struct i2c_adapter *adapter; struct i2c_adapter *adapter;
int res = 0; int res;
mutex_lock(&core_lists);
/* add the driver to the list of i2c drivers in the driver core */ /* add the driver to the list of i2c drivers in the driver core */
driver->driver.owner = owner; driver->driver.owner = owner;
@ -298,8 +296,10 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
res = driver_register(&driver->driver); res = driver_register(&driver->driver);
if (res) if (res)
goto out_unlock; return res;
mutex_lock(&core_lists);
list_add_tail(&driver->list,&drivers); list_add_tail(&driver->list,&drivers);
pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name); pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name);
@ -311,9 +311,8 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
} }
} }
out_unlock:
mutex_unlock(&core_lists); mutex_unlock(&core_lists);
return res; return 0;
} }
EXPORT_SYMBOL(i2c_register_driver); EXPORT_SYMBOL(i2c_register_driver);