scsi: lpfc: Fix attempted FA-PWWN usage after feature disable

Disabling FA-PWWN should be effective after port reset, but in some cases
it was found to be impossible to clear FA-PWWN usage without a driver
reload.

Clean up FA-PWWN flag management to make enable and disable of the feature
more robust.

Link: https://lore.kernel.org/r/20220701211425.2708-7-jsmart2021@gmail.comCo-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_init.c

@@ -375,6 +375,9 @@ lpfc_update_vport_wwn(struct lpfc_vport *vport)
 		if (phba->sli_rev == LPFC_SLI_REV4 &&
 		    vport->port_type == LPFC_PHYSICAL_PORT &&
 		    phba->sli4_hba.fawwpn_flag & LPFC_FAWWPN_FABRIC) {
+			if (!(phba->sli4_hba.fawwpn_flag & LPFC_FAWWPN_CONFIG))
+				phba->sli4_hba.fawwpn_flag &=
+						~LPFC_FAWWPN_FABRIC;
 			lpfc_printf_log(phba, KERN_INFO,
 					LOG_SLI | LOG_DISCOVERY | LOG_ELS,
 					"2701 FA-PWWN change WWPN from %llx to "
@@ -9975,7 +9978,8 @@ lpfc_sli4_read_config(struct lpfc_hba *phba)
 					"configured on\n");
 			phba->sli4_hba.fawwpn_flag |= LPFC_FAWWPN_CONFIG;
 		} else {
-			phba->sli4_hba.fawwpn_flag = 0;
+			/* Clear FW configured flag, preserve driver flag */
+			phba->sli4_hba.fawwpn_flag &= ~LPFC_FAWWPN_CONFIG;
 		}
 
 		phba->sli4_hba.conf_trunk =

drivers/scsi/lpfc/lpfc_sli.c

@@ -5265,7 +5265,8 @@ lpfc_sli_brdrestart_s4(struct lpfc_hba *phba)
 	phba->pport->stopped = 0;
 	phba->link_state = LPFC_INIT_START;
 	phba->hba_flag = 0;
-	phba->sli4_hba.fawwpn_flag = 0;
+	/* Preserve FA-PWWN expectation */
+	phba->sli4_hba.fawwpn_flag &= LPFC_FAWWPN_FABRIC;
 	spin_unlock_irq(&phba->hbalock);
 
 	memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets));
@@ -6054,6 +6055,10 @@ lpfc_sli4_retrieve_pport_name(struct lpfc_hba *phba)
 	/* obtain link type and link number via READ_CONFIG */
 	phba->sli4_hba.lnk_info.lnk_dv = LPFC_LNK_DAT_INVAL;
 	lpfc_sli4_read_config(phba);
+
+	if (phba->sli4_hba.fawwpn_flag & LPFC_FAWWPN_CONFIG)
+		phba->sli4_hba.fawwpn_flag |= LPFC_FAWWPN_FABRIC;
+
 	if (phba->sli4_hba.lnk_info.lnk_dv == LPFC_LNK_DAT_VAL)
 		goto retrieve_ppname;