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authorVladimir Oltean <vladimir.oltean@nxp.com>2021-03-24 12:56:39 +0300
committerDavid S. Miller <davem@davemloft.net>2021-03-26 02:48:45 +0300
commit479dc497db8322ae486f8ee49020f5600a77a680 (patch)
tree822b30f5466cbbeed5479139e081cebc8f10b198 /net/dsa
parent002322402dafd846c424ffa9240a937f49b48c42 (diff)
downloadlinux-479dc497db8322ae486f8ee49020f5600a77a680.tar.xz
net: dsa: only unset VLAN filtering when last port leaves last VLAN-aware bridge
DSA is aware of switches with global VLAN filtering since the blamed commit, but it makes a bad decision when multiple bridges are spanning the same switch: ip link add br0 type bridge vlan_filtering 1 ip link add br1 type bridge vlan_filtering 1 ip link set swp2 master br0 ip link set swp3 master br0 ip link set swp4 master br1 ip link set swp5 master br1 ip link set swp5 nomaster ip link set swp4 nomaster [138665.939930] sja1105 spi0.1: port 3: dsa_core: VLAN filtering is a global setting [138665.947514] DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE When all ports leave br1, DSA blindly attempts to disable VLAN filtering on the switch, ignoring the fact that br0 still exists and is VLAN-aware too. It fails while doing that. This patch checks whether any port exists at all and is under a VLAN-aware bridge. Fixes: d371b7c92d19 ("net: dsa: Unset vlan_filtering when ports leave the bridge") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/switch.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 4b5da89dc27a..32963276452f 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -107,7 +107,7 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
bool unset_vlan_filtering = br_vlan_enabled(info->br);
struct dsa_switch_tree *dst = ds->dst;
struct netlink_ext_ack extack = {0};
- int err, i;
+ int err, port;
if (dst->index == info->tree_index && ds->index == info->sw_index &&
ds->ops->port_bridge_join)
@@ -124,13 +124,16 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
* it. That is a good thing, because that lets us handle it and also
* handle the case where the switch's vlan_filtering setting is global
* (not per port). When that happens, the correct moment to trigger the
- * vlan_filtering callback is only when the last port left this bridge.
+ * vlan_filtering callback is only when the last port leaves the last
+ * VLAN-aware bridge.
*/
if (unset_vlan_filtering && ds->vlan_filtering_is_global) {
- for (i = 0; i < ds->num_ports; i++) {
- if (i == info->port)
- continue;
- if (dsa_to_port(ds, i)->bridge_dev == info->br) {
+ for (port = 0; port < ds->num_ports; port++) {
+ struct net_device *bridge_dev;
+
+ bridge_dev = dsa_to_port(ds, port)->bridge_dev;
+
+ if (bridge_dev && br_vlan_enabled(bridge_dev)) {
unset_vlan_filtering = false;
break;
}