diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2009-03-12 18:56:15 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:20 -0300 |
| commit | 7c026c35114d169d77c2543fdf4d5689a1c9a51d (patch) | |
| tree | 6c179ab3dc681829fc8e8042dae02755cc111f8d | |
| parent | 2c79252326421dd49c059aceec0880d2cf15b17a (diff) | |
V4L/DVB (10983): v4l2-common: add missing i2c_unregister_device.
If the i2c sub-device cannot be found, then we must unregister the i2c_client.
Otherwise this will prevent a possible probe for a different device on that same
address.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/v4l2-common.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c index dbced906aa0..49aad1ed0b2 100644 --- a/drivers/media/video/v4l2-common.c +++ b/drivers/media/video/v4l2-common.c @@ -813,11 +813,11 @@ struct v4l2_subdev *v4l2_i2c_new_subdev(struct i2c_adapter *adapter, We need better support from the kernel so that we can easily wait for the load to finish. */ if (client == NULL || client->driver == NULL) - return NULL; + goto error; /* Lock the module so we can safely get the v4l2_subdev pointer */ if (!try_module_get(client->driver->driver.owner)) - return NULL; + goto error; sd = i2c_get_clientdata(client); /* Register with the v4l2_device which increases the module's @@ -826,8 +826,13 @@ struct v4l2_subdev *v4l2_i2c_new_subdev(struct i2c_adapter *adapter, sd = NULL; /* Decrease the module use count to match the first try_module_get. */ module_put(client->driver->driver.owner); - return sd; +error: + /* If we have a client but no subdev, then something went wrong and + we must unregister the client. */ + if (client && sd == NULL) + i2c_unregister_device(client); + return sd; } EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev); @@ -860,11 +865,11 @@ struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct i2c_adapter *adapter, We need better support from the kernel so that we can easily wait for the load to finish. */ if (client == NULL || client->driver == NULL) - return NULL; + goto error; /* Lock the module so we can safely get the v4l2_subdev pointer */ if (!try_module_get(client->driver->driver.owner)) - return NULL; + goto error; sd = i2c_get_clientdata(client); /* Register with the v4l2_device which increases the module's @@ -873,6 +878,12 @@ struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct i2c_adapter *adapter, sd = NULL; /* Decrease the module use count to match the first try_module_get. */ module_put(client->driver->driver.owner); + +error: + /* If we have a client but no subdev, then something went wrong and + we must unregister the client. */ + if (client && sd == NULL) + i2c_unregister_device(client); return sd; } EXPORT_SYMBOL_GPL(v4l2_i2c_new_probed_subdev); |