Linux Ethernet Bridging - Dec 2021 - [Bridge] [PATCH net] net: bridge: mcast: fix br_multicast_ctx_vlan_global_disabled helper

We need to first check if the context is a vlan one, then we need to
check the global bridge multicast vlan snooping flag, and finally the
vlan's multicast flag, otherwise we will unnecessarily enable vlan mcast
processing (e.g. querier timers).

Fixes: 7b54aaaf53cb ("net: bridge: multicast: add vlan state initialization
and control")
Signed-off-by: Nikolay Aleksandrov <nikolay at nvidia.com>
---
 net/bridge/br_private.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 2187a0c3fd22..4c7e67d7a5b8 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1153,9 +1153,9 @@ br_multicast_port_ctx_get_global(const struct
net_bridge_mcast_port *pmctx)
 static inline bool
 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
 {
-	return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) &&
-	       br_multicast_ctx_is_vlan(brmctx) &&
-	       !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED);
+	return br_multicast_ctx_is_vlan(brmctx) &&
+	       (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
+	        !(brmctx->vlan->priv_flags &
BR_VLFLAG_GLOBAL_MCAST_ENABLED));
 }
 
 static inline bool
-- 
2.33.1

We need to first check if the context is a vlan one, then we need to
check the global bridge multicast vlan snooping flag, and finally the
vlan's multicast flag, otherwise we will unnecessarily enable vlan mcast
processing (e.g. querier timers).

Fixes: 7b54aaaf53cb ("net: bridge: multicast: add vlan state initialization
and control")
Signed-off-by: Nikolay Aleksandrov <nikolay at nvidia.com>
---
v2: fix indentation warning by checkpatch

 net/bridge/br_private.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 2187a0c3fd22..e8c6ee322c71 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1153,9 +1153,9 @@ br_multicast_port_ctx_get_global(const struct
net_bridge_mcast_port *pmctx)
 static inline bool
 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
 {
-	return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) &&
-	       br_multicast_ctx_is_vlan(brmctx) &&
-	       !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED);
+	return br_multicast_ctx_is_vlan(brmctx) &&
+	       (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
+		!(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
 }
 
 static inline bool
-- 
2.33.1