lock_bus
.lock_bus = lock_bus,
.lock_bus = lock_bus,
adap->lock_ops->lock_bus(adap, 0);
.lock_bus = gmbus_lock_bus,
sdvo->i2c->lock_ops->lock_bus(sdvo->i2c, flags);
.lock_bus = proxy_lock_bus,
void (*lock_bus)(struct i2c_adapter *, unsigned int);