scsi: lpfc: Linux LPFC driver does not process all RSCNs

During RSCN storms, the driver does not rediscover some targets.  The
driver marks some RSCN as to be handled after the ones it's working
on. The driver missed processing some deferred RSCN.

Move where the driver checks for deferred RSCNs and initiate deferred
RSCN handling if the flag was set. Also revise nport state within the
RSCN confirm routine. Add some state data to a possible debug print to
aid future debugging.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_ct.c

@@ -685,6 +685,25 @@ lpfc_cmpl_ct_cmd_gid_ft(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 			lpfc_els_flush_rscn(vport);
 		goto out;
 	}
+
+	spin_lock_irq(shost->host_lock);
+	if (vport->fc_flag & FC_RSCN_DEFERRED) {
+		vport->fc_flag &= ~FC_RSCN_DEFERRED;
+		spin_unlock_irq(shost->host_lock);
+
+		/*
+		 * Skip processing the NS response
+		 * Re-issue the NS cmd
+		 */
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "0151 Process Deferred RSCN Data: x%x x%x\n",
+				 vport->fc_flag, vport->fc_rscn_id_cnt);
+		lpfc_els_handle_rscn(vport);
+
+		goto out;
+	}
+	spin_unlock_irq(shost->host_lock);
+
 	if (irsp->ulpStatus) {
 		/* Check for retry */
 		if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {

drivers/scsi/lpfc/lpfc_els.c

@@ -1675,6 +1675,7 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
 
 		/* Two ndlps cannot have the same did on the nodelist */
 		ndlp->nlp_DID = keepDID;
+		lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
 		if (phba->sli_rev == LPFC_SLI_REV4 &&
 		    active_rrqs_xri_bitmap)
 			memcpy(ndlp->active_rrqs_xri_bitmap,
@@ -6177,9 +6178,6 @@ lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
 		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 		/* send RECOVERY event for ALL nodes that match RSCN payload */
 		lpfc_rscn_recovery_check(vport);
-		spin_lock_irq(shost->host_lock);
-		vport->fc_flag &= ~FC_RSCN_DEFERRED;
-		spin_unlock_irq(shost->host_lock);
 		return 0;
 	}
 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,

drivers/scsi/lpfc/lpfc_hbadisc.c

@@ -5836,9 +5836,12 @@ __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
 		if (filter(ndlp, param)) {
 			lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
 					 "3185 FIND node filter %p DID "
-					 "Data: x%p x%x x%x\n",
+					 "ndlp %p did x%x flg x%x st x%x "
+					 "xri x%x type x%x rpi x%x\n",
 					 filter, ndlp, ndlp->nlp_DID,
-					 ndlp->nlp_flag);
+					 ndlp->nlp_flag, ndlp->nlp_state,
+					 ndlp->nlp_xri, ndlp->nlp_type,
+					 ndlp->nlp_rpi);
 			return ndlp;
 		}
 	}