system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-19 17:58:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

net: dsa: mv88e6xxx: Avoid useless attempts to fast-age LAGs

Browse source 
When a port is a part of a LAG, the ATU will create dynamic entries
belonging to the LAG ID when learning is enabled. So trying to
fast-age those out using the constituent port will have no
effect. Unfortunately the hardware does not support move operations on
LAGs so there is no obvious way to transform the request to target the
LAG instead.

Instead we document this known limitation and at least avoid wasting
any time on it.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tobias Waldekranz 2021-03-18 20:25:34 +01:00 committed by David S. Miller
parent cc76ce9e8d
commit ffcec3f257
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/net/dsa/mv88e6xxx/chip.c
View file

@ -1479,6 +1479,13 @@ static void mv88e6xxx_port_fast_age(struct dsa_switch *ds, int port)
struct mv88e6xxx_chip *chip = ds->priv;
int err;
if (dsa_to_port(ds, port)->lag_dev)
/* Hardware is incapable of fast-aging a LAG through a
* regular ATU move operation. Until we have something
* more fancy in place this is a no-op.
*/
return;
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_g1_atu_remove(chip, 0, port, false);
mv88e6xxx_reg_unlock(chip);