Index: linux-4.1.52/drivers/net/ppp/ppp_generic.c
===================================================================
--- linux-4.1.52.orig/drivers/net/ppp/ppp_generic.c	2018-01-22 14:21:12.281630779 +0800
+++ linux-4.1.52/drivers/net/ppp/ppp_generic.c	2018-01-23 13:21:26.001634991 +0800
@@ -3028,7 +3028,7 @@
      * num[1] == 1:  vlanMux mode: ppp0.100, ppp1.200...  
      * num[1] == 2:  msc (multiple service mode) ppp0_1, ppp1_3...
      * num[1] == 3:  pppoa0, pppoa1...
-     *
+     * num[1] == 4:  pppowwan
      */
       num[0] = u<<(32-(FIELD2+FIELD1+FIELD0))>>(32-FIELD0);
       num[1] = u<<(32-(FIELD2+FIELD1))>>(32-FIELD1);
@@ -3049,6 +3049,11 @@
       {
          sprintf(dev->name, "pppoa%d", num[0]);
       }
+#if 1 /* support pppowwan */
+      else if (num[1] == 4){ /* pppowwan */
+         sprintf(dev->name, "pppowwan%d", num[0]);
+      }
+#endif
    }
 #else
 	sprintf(dev->name, "ppp%d", unit);
@@ -3106,6 +3111,9 @@
 	ppp_lock(ppp);
 	if (!ppp->closing) {
 #if defined(CONFIG_BCM_KF_PPP)
+#if 1 /* support pppowwan */
+		if(!strstr(ppp->dev->name,"pppowwan")){
+#endif
                 int err;
                 struct net_device *next_dev;
                 next_dev = netdev_path_next_dev(ppp->dev);
@@ -3118,6 +3126,9 @@
                 }
                 if(next_dev != NULL)
                    dev_put(next_dev);
+#if 1 /* support pppowwan */
+		}
+#endif
 #endif
 		ppp->closing = 1;
 		ppp_unlock(ppp);