ip_gre: erspan device should keep dst

lxin · davem330 · commit c84bed440e4e · 2017-10-01T22:30:32.000-07:00
The patch 'ip_gre: ipgre_tap device should keep dst' fixed the issue ipgre_tap dev mtu couldn't be updated in tx path. The same fix is needed for erspan as well. Fixes: 84e54fe ("gre: introduce native tunnel support for ERSPAN") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
@@ -1254,6 +1254,7 @@ static int erspan_tunnel_init(struct net_device *dev)
 	dev->features		|= GRE_FEATURES;
 	dev->hw_features	|= GRE_FEATURES;
 	dev->priv_flags		|= IFF_LIVE_ADDR_CHANGE;
+	netif_keep_dst(dev);
 
 	return ip_tunnel_init(dev);
 }

Original file line number	Diff line number	Diff line change
`@@ -1254,6 +1254,7 @@ static int erspan_tunnel_init(struct net_device *dev)`
`1254`	`1254`	`dev->features \|= GRE_FEATURES;`
`1255`	`1255`	`dev->hw_features \|= GRE_FEATURES;`
`1256`	`1256`	`dev->priv_flags \|= IFF_LIVE_ADDR_CHANGE;`
	`1257`	`+ netif_keep_dst(dev);`
`1257`	`1258`
`1258`	`1259`	`return ip_tunnel_init(dev);`
`1259`	`1260`	`}`