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net: dsa: felix: send VLANs on CPU port as egress-tagged

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As explained in other commits before (b9cd75e668 and 87b0f983f6),
ocelot switches have a single egress-untagged VLAN per port, and the
driver would deny adding a second one while an egress-untagged VLAN
already exists.

But on the CPU port (where the VLAN configuration is implicit, because
there is no net device for the bridge to control), the DSA core attempts
to add a VLAN using the same flags as were used for the front-panel
port. This would make adding any untagged VLAN fail due to the CPU port
rejecting the configuration:

bridge vlan add dev swp0 vid 100 pvid untagged
[ 1865.854253] mscc_felix 0000:00:00.5: Port already has a native VLAN: 1
[ 1865.860824] mscc_felix 0000:00:00.5: Failed to add VLAN 100 to port 5: -16

(note that port 5 is the CPU port and not the front-panel swp0).

So this hardware will send all VLANs as tagged towards the CPU.

Fixes: 5605194877 ("net: dsa: ocelot: add driver for Felix switch family")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2020-05-27 19:48:03 +03:00 • committed by David S. Miller
parent b3b6a84c6a
commit 183be6f967
1 changed files with 6 additions and 2 deletions
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8
drivers/net/dsa/ocelot/felix.c
View file

@ -102,13 +102,17 @@ static void felix_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct ocelot *ocelot = ds->priv;
u16 flags = vlan->flags;
u16 vid;
int err;
if (dsa_is_cpu_port(ds, port))
flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
err = ocelot_vlan_add(ocelot, port, vid,
vlan->flags & BRIDGE_VLAN_INFO_PVID,
vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED);
flags & BRIDGE_VLAN_INFO_PVID,
flags & BRIDGE_VLAN_INFO_UNTAGGED);
if (err) {
dev_err(ds->dev, "Failed to add VLAN %d to port %d: %d\n",
vid, port, err);