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net: dsa: Don't offload port attributes on standalone ports 

In a situation where a standalone port is indirectly attached to a
bridge (e.g. via a LAG) which is not offloaded, do not offload any
port attributes either. The port should behave as a standard NIC.

Previously, on mv88e6xxx, this meant that in the following setup:

     br0
     /
  team0
   / \
swp0 swp1

If vlan filtering was enabled on br0, swp0's and swp1's QMode was set
to "secure". This caused all untagged packets to be dropped, as their
default VID (0) was not loaded into the VTU.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tobias Waldekranz 2021-01-13 09:42:52 +01:00 committed by Jakub Kicinski
parent 32d4c5647a
commit 5696c8aedf
1 changed files with 3 additions and 0 deletions
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3
net/dsa/slave.c
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@ -273,6 +273,9 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
struct dsa_port *dp = dsa_slave_to_port(dev);
int ret;
if (attr->orig_dev != dev)
return -EOPNOTSUPP;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
ret = dsa_port_set_state(dp, attr->u.stp_state);