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net: dsa: mv88e6xxx: Ensure STU support in VLAN MSTI callback

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In the same way that we check for STU support in the MST state
callback, we should also verify it before trying to change a VLANs
MSTI membership.

Fixes: acaf4d2e36 ("net: dsa: mv88e6xxx: MST Offloading")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tobias Waldekranz 2022-03-18 21:13:21 +01:00 • committed by Jakub Kicinski
parent afaed2b142
commit bd48b911c8
1 changed files with 3 additions and 0 deletions
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3
drivers/net/dsa/mv88e6xxx/chip.c
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@ -2678,6 +2678,9 @@ static int mv88e6xxx_vlan_msti_set(struct dsa_switch *ds,
u8 old_sid, new_sid;
int err;
if (!mv88e6xxx_has_stu(chip))
return -EOPNOTSUPP;
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_vtu_get(chip, msti->vid, &vlan);