nvmet: fix an error code

We accidentally return zero here when ERR_PTR(-ENOMEM) is intended.

Fixes: a07b4970f464 ('nvmet: add a generic NVMe target')
Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/nvme/target/configfs.c

···
 
 	port = kzalloc(sizeof(*port), GFP_KERNEL);
 	if (!port)
-		return ERR_CAST(port);
+		return ERR_PTR(-ENOMEM);
 
 	INIT_LIST_HEAD(&port->entry);
 	config_group_init_type_name(&port->group, name, &nvmet_referral_type);
···
 
 	port = kzalloc(sizeof(*port), GFP_KERNEL);
 	if (!port)
-		return ERR_CAST(port);
+		return ERR_PTR(-ENOMEM);
 
 	INIT_LIST_HEAD(&port->entry);
 	INIT_LIST_HEAD(&port->subsystems);