lpfc: Fix crash in device reset handler.

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

drivers/scsi/lpfc/lpfc_scsi.c

@@ -5118,9 +5118,10 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
 	int status;
 
 	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
-	if (!rdata) {
+	if (!rdata || !rdata->pnode) {
 		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
-			"0798 Device Reset rport failure: rdata x%p\n", rdata);
+				 "0798 Device Reset rport failure: rdata x%p\n",
+				 rdata);
 		return FAILED;
 	}
 	pnode = rdata->pnode;