scsi: libfc: If PRLI rejected, move rport to PLOGI state

If PRLI reject code indicates "rejected status", move rport state machine
back to PLOGI state.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Javed Hasan <[email protected]>
Signed-off-by: Saurav Kashyap <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: javed-h

drivers/scsi/libfc/fc_rport.c

@@ -1208,9 +1208,15 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
 		rjt = fc_frame_payload_get(fp, sizeof(*rjt));
 		if (!rjt)
 			FC_RPORT_DBG(rdata, "PRLI bad response\n");
-		else
+		else {
 			FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n",
 				     rjt->er_reason, rjt->er_explan);
+			if (rjt->er_reason == ELS_RJT_UNAB &&
+			    rjt->er_explan == ELS_EXPL_PLOGI_REQD) {
+				fc_rport_enter_plogi(rdata);
+				goto out;
+			}
+		}
 		fc_rport_error_retry(rdata, FC_EX_ELS_RJT);
 	}