scsi: qla2xxx: edif: Fix session thrash

Current code prematurely sends out PRLI before authentication application
has given the OK to do so. This causes PRLI failure and session teardown.

Prevents PRLI from going out before authentication app gives the OK.

Link: https://lore.kernel.org/r/20220608115849.16693-7-njavali@marvell.com
Fixes: 91f6f5fb ("scsi: qla2xxx: edif: Reduce connection thrash")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_edif.c

@@ -3517,7 +3517,7 @@ int qla_edif_process_els(scsi_qla_host_t *vha, struct bsg_job *bsg_job)
 	if (qla_bsg_check(vha, bsg_job, fcport))
 		return 0;
 
-	if (fcport->loop_id == FC_NO_LOOP_ID) {
+	if (EDIF_SESS_DELETE(fcport)) {
 		ql_dbg(ql_dbg_edif, vha, 0x910d,
 		    "%s ELS code %x, no loop id.\n", __func__,
 		    bsg_request->rqst_data.r_els.els_code);

drivers/scsi/qla2xxx/qla_edif.h

@@ -141,4 +141,8 @@ struct enode {
 	(DBELL_ACTIVE(_fcport->vha) && \
 	 (_fcport->disc_state == DSC_LOGIN_AUTH_PEND))
 
+#define EDIF_SESS_DELETE(_s) \
+	(qla_ini_mode_enabled(_s->vha) && (_s->disc_state == DSC_DELETE_PEND || \
+	 _s->disc_state == DSC_DELETED))
+
 #endif	/* __QLA_EDIF_H */

drivers/scsi/qla2xxx/qla_init.c

@@ -1762,8 +1762,16 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
 		break;
 
 	case DSC_LOGIN_PEND:
-		if (fcport->fw_login_state == DSC_LS_PLOGI_COMP)
+		if (vha->hw->flags.edif_enabled)
+			break;
+
+		if (fcport->fw_login_state == DSC_LS_PLOGI_COMP) {
+			ql_dbg(ql_dbg_disc, vha, 0x2118,
+			       "%s %d %8phC post %s PRLI\n",
+			       __func__, __LINE__, fcport->port_name,
+			       NVME_TARGET(vha->hw, fcport) ? "NVME" : "FC");
 			qla24xx_post_prli_work(vha, fcport);
+		}
 		break;
 
 	case DSC_UPD_FCPORT: