diff options
Diffstat (limited to 'drivers/i2c/i2c-core.c')
-rw-r--r-- | drivers/i2c/i2c-core.c | 46 |
1 files changed, 2 insertions, 44 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 7788e173006..9b9d808578b 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -696,8 +696,6 @@ int i2c_attach_client(struct i2c_client *client) } list_add_tail(&client->list,&adapter->clients); - client->usage_count = 0; - client->dev.parent = &client->adapter->dev; client->dev.bus = &i2c_bus_type; @@ -744,12 +742,6 @@ int i2c_detach_client(struct i2c_client *client) struct i2c_adapter *adapter = client->adapter; int res = 0; - if (client->usage_count > 0) { - dev_warn(&client->dev, "Client [%s] still busy, " - "can't detach\n", client->name); - return -EBUSY; - } - if (adapter->client_unregister) { res = adapter->client_unregister(client); if (res) { @@ -772,50 +764,16 @@ int i2c_detach_client(struct i2c_client *client) } EXPORT_SYMBOL(i2c_detach_client); -static int i2c_inc_use_client(struct i2c_client *client) -{ - - if (!try_module_get(client->driver->driver.owner)) - return -ENODEV; - if (!try_module_get(client->adapter->owner)) { - module_put(client->driver->driver.owner); - return -ENODEV; - } - - return 0; -} - -static void i2c_dec_use_client(struct i2c_client *client) -{ - module_put(client->driver->driver.owner); - module_put(client->adapter->owner); -} - int i2c_use_client(struct i2c_client *client) { - int ret; - - ret = i2c_inc_use_client(client); - if (ret) - return ret; - - client->usage_count++; - + get_device(&client->dev); return 0; } EXPORT_SYMBOL(i2c_use_client); int i2c_release_client(struct i2c_client *client) { - if (!client->usage_count) { - pr_debug("i2c-core: %s used one too many times\n", - __FUNCTION__); - return -EPERM; - } - - client->usage_count--; - i2c_dec_use_client(client); - + put_device(&client->dev); return 0; } EXPORT_SYMBOL(i2c_release_client); |