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| author |   Ioana Ciornei <ioana.ciornei@nxp.com> | 2019-05-30 00:42:30 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-05-30 14:47:14 -0700 |
| commit | d34d2baa9173f6e0c0f22d005d18e83d1cb54d8d (patch) | |
| tree | 6faa3f16bcf1c7b9d598f3345fde3da5d11555dc /net | |
| parent | net: mvpp2: fix bad MVPP2_TXQ_SCHED_TOKEN_CNTR_REG queue value (diff) | |
| download | linux-dev-d34d2baa9173f6e0c0f22d005d18e83d1cb54d8d.tar.xz linux-dev-d34d2baa9173f6e0c0f22d005d18e83d1cb54d8d.zip | |
net: dsa: tag_8021q: Change order of rx_vid setup
The 802.1Q tagging performs an unbalanced setup in terms of RX VIDs on
the CPU port. For the ingress path of a 802.1Q switch to work, the RX
VID of a port needs to be seen as tagged egress on the CPU port.
While configuring the other front-panel ports to be part of this VID,
for bridge scenarios, the untagged flag is applied even on the CPU port
in dsa_switch_vlan_add. This happens because DSA applies the same flags
on the CPU port as on the (bridge-controlled) slave ports, and the
effect in this case is that the CPU port tagged settings get deleted.
Instead of fixing DSA by introducing a way to control VLAN flags on the
CPU port (and hence stop inheriting from the slave ports) - a hard,
perhaps intractable problem - avoid this situation by moving the setup
part of the RX VID on the CPU port after all the other front-panel ports
have been added to the VID.
Fixes: f9bbe4477c30 ("net: dsa: Optional VLAN-based port separation for switches without tagging")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/dsa/tag_8021q.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c index 8ae48c7e1e76..4adec6bbfe59 100644 --- a/net/dsa/tag_8021q.c +++ b/net/dsa/tag_8021q.c @@ -128,10 +128,7 @@ int dsa_port_setup_8021q_tagging(struct dsa_switch *ds, int port, bool enabled) u16 flags; if (i == upstream) - /* CPU port needs to see this port's RX VID - * as tagged egress. - */ - flags = 0; + continue; else if (i == port) /* The RX VID is pvid on this port */ flags = BRIDGE_VLAN_INFO_UNTAGGED | @@ -150,6 +147,20 @@ int dsa_port_setup_8021q_tagging(struct dsa_switch *ds, int port, bool enabled) return err; } } + + /* CPU port needs to see this port's RX VID + * as tagged egress. + */ + if (enabled) + err = dsa_port_vid_add(upstream_dp, rx_vid, 0); + else + err = dsa_port_vid_del(upstream_dp, rx_vid); + if (err) { + dev_err(ds->dev, "Failed to apply RX VID %d to port %d: %d\n", + rx_vid, port, err); + return err; + } + /* Finally apply the TX VID on this port and on the CPU port */ if (enabled) err = dsa_port_vid_add(dp, tx_vid, BRIDGE_VLAN_INFO_UNTAGGED); |