diff options
| author | Jean Delvare <khali@linux-fr.org> | 2008-01-27 20:14:48 +0300 |
|---|---|---|
| committer | Jean Delvare <khali@hyperion.delvare> | 2008-01-27 20:14:48 +0300 |
| commit | bdc511f438f6ca40307e06edda00331e6ac0f813 (patch) | |
| tree | 06b099c3aa7cb83ca45d4ff280d312f1976c34f6 /drivers | |
| parent | 0f79b72e45da68bf542a63a08f9c924b91b507e7 (diff) | |
| download | linux-bdc511f438f6ca40307e06edda00331e6ac0f813.tar.xz | |
i2c: Use the driver model reference counting
Don't implement our own reference counting mechanism for i2c clients
when the driver model already has one.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 46 | ||||
| -rw-r--r-- | drivers/media/video/ks0127.c | 1 |
2 files changed, 2 insertions, 45 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 7788e1730063..9b9d808578b9 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); diff --git a/drivers/media/video/ks0127.c b/drivers/media/video/ks0127.c index b6cd21e6dab9..4895540be195 100644 --- a/drivers/media/video/ks0127.c +++ b/drivers/media/video/ks0127.c @@ -764,7 +764,6 @@ static struct i2c_client ks0127_client_tmpl = .addr = 0, .adapter = NULL, .driver = &i2c_driver_ks0127, - .usage_count = 0 }; static int ks0127_found_proc(struct i2c_adapter *adapter, int addr, int kind) |