[PATCH v2 24/33] ibmvfc: register local nvme fc port after fabric login

[Tyrel Datwyler <tyreld@linux.ibm.com>]

Register the local NVMe/FC port only after fabric login has completed.

The VIOS returns the client port ID in the fabric login response, and
that port ID is required to populate the local-port information passed
to the NVMe-FC midlayer. Delay local-port registration until that data
is available and update the registration helper accordingly.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc-core.c |  5 +++++
 drivers/scsi/ibmvscsi/ibmvfc-nvme.c | 17 ++++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc-core.c b/drivers/scsi/ibmvscsi/ibmvfc-core.c
index ff84ca0f9f45..81d9229bf388 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc-core.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc-core.c
@@ -5210,6 +5210,8 @@ static void ibmvfc_fabric_login_nvme_done(struct ibmvfc_event *evt)
 
 	switch (mad_status) {
 	case IBMVFC_MAD_SUCCESS:
+		fc_host_port_id(vhost->host) = be64_to_cpu(rsp->nport_id);
+		ibmvfc_nvme_register(vhost);
 		ibmvfc_dbg(vhost, "NVMe fabric login succeeded\n");
 		break;
 	case IBMVFC_MAD_FAILED:
@@ -5271,6 +5273,7 @@ static void ibmvfc_fabric_login_scsi_done(struct ibmvfc_event *evt)
 
 	switch (mad_status) {
 	case IBMVFC_MAD_SUCCESS:
+		fc_host_port_id(vhost->host) = be64_to_cpu(rsp->nport_id);
 		ibmvfc_dbg(vhost, "SCSI fabric login succeeded\n");
 		break;
 	case IBMVFC_MAD_FAILED:
@@ -5653,6 +5656,7 @@ static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
 	case IBMVFC_MAD_SUCCESS:
 		if (list_empty(&vhost->crq.sent) &&
 		    vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
+			ibmvfc_nvme_unregister(vhost);
 			ibmvfc_init_host(vhost);
 			return;
 		}
@@ -5931,6 +5935,7 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
 		list_splice_init(&vhost->purge, &purge);
 		spin_unlock_irqrestore(vhost->host->host_lock, flags);
 		ibmvfc_complete_purge(&purge);
+		ibmvfc_nvme_unregister(vhost);
 		rc = ibmvfc_reset_crq(vhost);
 
 		spin_lock_irqsave(vhost->host->host_lock, flags);
diff --git a/drivers/scsi/ibmvscsi/ibmvfc-nvme.c b/drivers/scsi/ibmvscsi/ibmvfc-nvme.c
index d679d1ca366a..637d7d7015cf 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc-nvme.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc-nvme.c
@@ -145,14 +145,17 @@ int ibmvfc_nvme_register(struct ibmvfc_host *vhost)
 	pinfo.dev_loss_tmo = 0;
 
 	rc = nvme_fc_register_localport(&pinfo, &ibmvfc_nvme_fc_transport,
-					vhost->dev, &vhost->nvme_local_port);
+					get_device(vhost->dev),
+					&vhost->nvme_local_port);
 
 	if (!rc) {
 		ibmvfc_log(vhost, 2, "register_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n",
 			   pinfo.node_name, pinfo.port_name, pinfo.port_id);
 		vhost->nvme_local_port->private = vhost;
-	} else
+	} else {
 		dev_err(vhost->dev, "Failed to register NVMe fc localport (%d)\n", rc);
+		put_device(vhost->dev);
+	}
 
 	return rc;
 }
@@ -165,9 +168,17 @@ void ibmvfc_nvme_unregister(struct ibmvfc_host *vhost)
 		return;
 
 	if (vhost->nvme_local_port) {
+		ibmvfc_log(vhost, 2, "unregister_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n",
+			   vhost->nvme_local_port->node_name,
+			   vhost->nvme_local_port->port_name,
+			   vhost->nvme_local_port->port_id);
 		init_completion(&vhost->nvme_delete_done);
 		rc = nvme_fc_unregister_localport(vhost->nvme_local_port);
-		if (!rc)
+		if (!rc) {
 			wait_for_completion(&vhost->nvme_delete_done);
+		} else
+			dev_err(vhost->dev, "Failed to unregister NVMe fc localport (%d)\n", rc);
+
+		put_device(vhost->dev);
 	}
 }
-- 
2.55.0