[PATCH net-next] net: bridge: fix direct access to bridge vlan_enabled and use helper

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We need to use br_vlan_enabled() helper otherwise we'll break builds
without bridge vlans:
net/bridge//br_if.c: In function ‘br_mtu’:
net/bridge//br_if.c:458:8: error: ‘const struct net_bridge’ has no
member named ‘vlan_enabled’
  if (br->vlan_enabled)
        ^
net/bridge//br_if.c:462:1: warning: control reaches end of non-void
function [-Wreturn-type]
 }
 ^
scripts/Makefile.build:324: recipe for target 'net/bridge//br_if.o'
failed

Fixes: 419d14af9e07 ("bridge: Allow max MTU when multiple VLANs present")
Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
---
 net/bridge/br_if.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 48dc4d2e2be3..87b2afd455c7 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -455,7 +455,7 @@ static int __br_mtu(const struct net_bridge *br, bool (compare_fn)(int, int))
 
 int br_mtu(const struct net_bridge *br)
 {
-	if (br->vlan_enabled)
+	if (br_vlan_enabled(br->dev))
 		return __br_mtu(br, max_mtu);
 	else
 		return __br_mtu(br, min_mtu);
-- 
2.1.4




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