net: dsa: felix: program host FDB entries towards PGID_CPU for tag_8021q too

Browse source

I remembered why we had the host FDB migration procedure in place.

It is true that host FDB entry migration can be done by changing the
value of PGID_CPU, but the problem is that only host FDB entries learned
while operating in NPI mode go to PGID_CPU. When the CPU port operates
in tag_8021q mode, the FDB entries are learned towards the unicast PGID
equal to the physical port number of this CPU port, bypassing the
PGID_CPU indirection.

So host FDB entries learned in tag_8021q mode are not migrated any
longer towards the NPI port.

Fix this by extracting the NPI port -> PGID_CPU redirection from the
ocelot switch lib, moving it to the Felix DSA driver, and applying it
for any CPU port regardless of its kind (NPI or tag_8021q).

Fixes: a51c1c3f32 ("net: dsa: felix: stop migrating FDBs back and forth on tag proto change")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Vladimir Oltean 2022-05-11 12:50:13 +03:00 • committed by Jakub Kicinski

parent f0a65f815f

commit e9b3ba439d

2 changed files with 11 additions and 8 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

12

drivers/net/dsa/ocelot/felix.c

View file

7

drivers/net/ethernet/mscc/ocelot.c

View file