There was quite some confusion why this completion is there and if it is still necessary. Sadly, it is. However, let's improve the comments and share what we rediscovered.
Signed-off-by: Wolfram Sang <[email protected]> --- drivers/i2c/i2c-core.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 39d25a8cb1ad..7a9368750b9a 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1796,11 +1796,15 @@ void i2c_del_adapter(struct i2c_adapter *adap) /* device name is gone after device_unregister */ dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name); - /* clean up the sysfs representation */ + /* wait until all references to the device are gone + * + * FIXME: This is old code and should ideally be replaced by an + * alternative which results in decoupling the lifetime of the struct + * device from the i2c_adapter, like spi or netdev do. Any solution + * should be throughly tested with DEBUG_KOBJECT_RELEASE enabled! + */ init_completion(&adap->dev_released); device_unregister(&adap->dev); - - /* wait for sysfs to drop all references */ wait_for_completion(&adap->dev_released); /* free bus id */ -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
