[SCSI] lpfc 8.3.21: FC Discovery changes

FC Discovery changes

- Treat received PLOGI while logged in as a relogin (unregister and reregister).
- Added a timer to delay Nport discovery when clean bit is cleared and Fabric
  portname/nodename/FCID is changed.
- Invalidate Port's DID when receiving PLOGI from p2p port with CONFIG_PORT
  mailbox command.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/lpfc/lpfc_hbadisc.c

@@ -658,6 +658,8 @@ lpfc_work_done(struct lpfc_hba *phba)
 				lpfc_ramp_down_queue_handler(phba);
 			if (work_port_events & WORKER_RAMP_UP_QUEUE)
 				lpfc_ramp_up_queue_handler(phba);
+			if (work_port_events & WORKER_DELAYED_DISC_TMO)
+				lpfc_delayed_disc_timeout_handler(vport);
 		}
 	lpfc_destroy_vport_work_array(phba, vports);
 
@@ -838,6 +840,11 @@ lpfc_linkdown_port(struct lpfc_vport *vport)
 
 	lpfc_port_link_failure(vport);
 
+	/* Stop delayed Nport discovery */
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~FC_DISC_DELAYED;
+	spin_unlock_irq(shost->host_lock);
+	del_timer_sync(&vport->delayed_disc_tmo);
 }
 
 int