diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index b346a687ab5..a96e1bf2764 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -437,6 +437,10 @@ static int i2c_register_adapter(struct i2c_adapter *adap) { int res = 0, dummy; + /* Can't register until after driver model init */ + if (unlikely(WARN_ON(!i2c_bus_type.p))) + return -EAGAIN; + mutex_init(&adap->bus_lock); mutex_init(&adap->clist_lock); INIT_LIST_HEAD(&adap->clients); @@ -696,6 +700,10 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) { int res; + /* Can't register until after driver model init */ + if (unlikely(WARN_ON(!i2c_bus_type.p))) + return -EAGAIN; + /* new style driver methods can't mix with legacy ones */ if (is_newstyle_driver(driver)) { if (driver->attach_adapter || driver->detach_adapter |