target/linux/generic/backport-5.15/741-v5.14-0003-net-dsa-b53-Create-default-VLAN-entry-explicitly.patch

   1 From 64a81b24487f0d2fba0f033029eec2abc7d82cee Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <f.fainelli@gmail.com>
   3 Date: Mon, 21 Jun 2021 15:10:55 -0700
   4 Subject: [PATCH] net: dsa: b53: Create default VLAN entry explicitly
   5
   6 In case CONFIG_VLAN_8021Q is not set, there will be no call down to the
   7 b53 driver to ensure that the default PVID VLAN entry will be configured
   8 with the appropriate untagged attribute towards the CPU port. We were
   9 implicitly relying on dsa_slave_vlan_rx_add_vid() to do that for us,
  10 instead make it explicit.
  11
  12 Reported-by: Vladimir Oltean <olteanv@gmail.com>
  13 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  14 Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
  15 Signed-off-by: David S. Miller <davem@davemloft.net>
  16 ---
  17  drivers/net/dsa/b53/b53_common.c | 27 +++++++++++++++++++--------
  18  1 file changed, 19 insertions(+), 8 deletions(-)
  19
  20 --- a/drivers/net/dsa/b53/b53_common.c
  21 +++ b/drivers/net/dsa/b53/b53_common.c
  22 @@ -693,6 +693,13 @@ static u16 b53_default_pvid(struct b53_d
  23                 return 0;
  24  }
  25
  26 +static bool b53_vlan_port_needs_forced_tagged(struct dsa_switch *ds, int port)
  27 +{
  28 +       struct b53_device *dev = ds->priv;
  29 +
  30 +       return dev->tag_protocol == DSA_TAG_PROTO_NONE && dsa_is_cpu_port(ds, port);
  31 +}
  32 +
  33  int b53_configure_vlan(struct dsa_switch *ds)
  34  {
  35         struct b53_device *dev = ds->priv;
  36 @@ -713,9 +720,20 @@ int b53_configure_vlan(struct dsa_switch
  37
  38         b53_enable_vlan(dev, -1, dev->vlan_enabled, ds->vlan_filtering);
  39
  40 -       b53_for_each_port(dev, i)
  41 +       /* Create an untagged VLAN entry for the default PVID in case
  42 +        * CONFIG_VLAN_8021Q is disabled and there are no calls to
  43 +        * dsa_slave_vlan_rx_add_vid() to create the default VLAN
  44 +        * entry. Do this only when the tagging protocol is not
  45 +        * DSA_TAG_PROTO_NONE
  46 +        */
  47 +       b53_for_each_port(dev, i) {
  48 +               v = &dev->vlans[def_vid];
  49 +               v->members |= BIT(i);
  50 +               if (!b53_vlan_port_needs_forced_tagged(ds, i))
  51 +                       v->untag = v->members;
  52                 b53_write16(dev, B53_VLAN_PAGE,
  53                             B53_VLAN_PORT_DEF_TAG(i), def_vid);
  54 +       }
  55
  56         /* Upon initial call we have not set-up any VLANs, but upon
  57          * system resume, we need to restore all VLAN entries.
  58 @@ -1429,13 +1447,6 @@ int b53_vlan_prepare(struct dsa_switch *
  59  }
  60  EXPORT_SYMBOL(b53_vlan_prepare);
  61
  62 -static bool b53_vlan_port_needs_forced_tagged(struct dsa_switch *ds, int port)
  63 -{
  64 -       struct b53_device *dev = ds->priv;
  65 -
  66 -       return dev->tag_protocol == DSA_TAG_PROTO_NONE && dsa_is_cpu_port(ds, port);
  67 -}
  68 -
  69  void b53_vlan_add(struct dsa_switch *ds, int port,
  70                   const struct switchdev_obj_port_vlan *vlan)
  71  {