devm_kzalloc
afkep = devm_kzalloc(dcp->dev, sizeof(*afkep), GFP_KERNEL);
dcp = devm_kzalloc(dev, sizeof(*dcp), GFP_KERNEL);
dcp->chunks.data = devm_kzalloc(dcp->dev, *length, GFP_KERNEL);
bl = devm_kzalloc(panel->dev, sizeof(*bl), GFP_KERNEL);