lpfc: Fix to handle PLOGI when already logged in

Signed-off-by: Dick Kennedy <dick.kennedy@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index 5cc1103..3d93363 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -276,6 +276,7 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
        struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
        struct lpfc_hba    *phba = vport->phba;
        struct lpfc_dmabuf *pcmd;
+       uint64_t nlp_portwwn = 0;
        uint32_t *lp;
        IOCB_t *icmd;
        struct serv_parm *sp;
@@ -332,6 +333,8 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
                        NULL);
                return 0;
        }
+
+       nlp_portwwn = wwn_to_u64(ndlp->nlp_portname.u.wwn);
        if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
                /* Reject this request because invalid parameters */
                stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
@@ -367,7 +370,7 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
        ndlp->nlp_maxframe =
                ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 
-       /* no need to reg_login if we are already in one of these states */
+       /* if already logged in, do implicit logout */
        switch (ndlp->nlp_state) {
        case  NLP_STE_NPR_NODE:
                if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
@@ -376,8 +379,26 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
        case  NLP_STE_PRLI_ISSUE:
        case  NLP_STE_UNMAPPED_NODE:
        case  NLP_STE_MAPPED_NODE:
-               lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
-               return 1;
+               /* lpfc_plogi_confirm_nport skips fabric did, handle it here */
+               if (!(ndlp->nlp_type & NLP_FABRIC)) {
+                       lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
+                                        ndlp, NULL);
+                       return 1;
+               }
+               if (nlp_portwwn != 0 &&
+                   nlp_portwwn != wwn_to_u64(sp->portName.u.wwn))
+                       lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+                                        "0143 PLOGI recv'd from DID: x%x "
+                                        "WWPN changed: old %llx new %llx\n",
+                                        ndlp->nlp_DID,
+                                        (unsigned long long)nlp_portwwn,
+                                        (unsigned long long)
+                                        wwn_to_u64(sp->portName.u.wwn));
+
+               ndlp->nlp_prev_state = ndlp->nlp_state;
+               /* rport needs to be unregistered first */
+               lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
+               break;
        }
 
        /* Check for Nport to NPort pt2pt protocol */