[SCSI] ibmvstgt: move crq_queue_create to the end of initialization

Calling crq_queue_create could lead to the creation of a rport. We
need to set up everything before creating a rport. This moves
crq_queue_create to the end of initialization to avoid a race which
causes an oops if lost.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reported-by: Olaf Hering <olh@suse.de>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/ibmvscsi/ibmvstgt.c

@@ -864,21 +864,23 @@ static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)
 
 	INIT_WORK(&vport->crq_work, handle_crq);
 
-	err = crq_queue_create(&vport->crq_queue, target);
+	err = scsi_add_host(shost, target->dev);
 	if (err)
 		goto free_srp_target;
 
-	err = scsi_add_host(shost, target->dev);
+	err = scsi_tgt_alloc_queue(shost);
 	if (err)
-		goto destroy_queue;
+		goto remove_host;
 
-	err = scsi_tgt_alloc_queue(shost);
+	err = crq_queue_create(&vport->crq_queue, target);
 	if (err)
-		goto destroy_queue;
+		goto free_queue;
 
 	return 0;
-destroy_queue:
-	crq_queue_destroy(target);
+free_queue:
+	scsi_tgt_free_queue(shost);
+remove_host:
+	scsi_remove_host(shost);
 free_srp_target:
 	srp_target_free(target);
 put_host: