[SCSI] ibmvstgt: set up scsi_host properly before __scsi_alloc_queue

Before calling __scsi_alloc_queue, scsi_host->shost_gendev.parent must
be initialized properly.

This patch moves __scsi_alloc_queue after scsi_add_host (like
initiator drivers do).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/ibmvscsi/ibmvstgt.c

@@ -838,9 +838,6 @@ static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)
 	if (!shost)
 		goto free_vport;
 	shost->transportt = ibmvstgt_transport_template;
-	err = scsi_tgt_alloc_queue(shost);
-	if (err)
-		goto put_host;
 
 	target = host_to_srp_target(shost);
 	target->shost = shost;
@@ -872,6 +869,10 @@ static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)
 	if (err)
 		goto destroy_queue;
 
+	err = scsi_tgt_alloc_queue(shost);
+	if (err)
+		goto destroy_queue;
+
 	return 0;
 destroy_queue:
 	crq_queue_destroy(target);