mlxsw: spectrum: Allocate active VLANs only for port netdevs

When adding support for bridges between VLAN interfaces, we'll introduce
a new entity called a vPort, which is a represntation of the VLAN
interface in the hardware.

The main difference between a vPort and a physical port is that several
FIDs can be bound to the latter, whereas only one (called a vFID) can be
bound to the first.

Therefore, it makes sense to use the same struct to represent the two,
but to only allocate the 'active_vlans' bitmap in case of a physical
port.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 322ed54..6bacdcf 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1245,6 +1245,7 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port)
        struct mlxsw_sp_port *mlxsw_sp_port;
        struct net_device *dev;
        bool usable;
+       size_t bytes;
        int err;
 
        dev = alloc_etherdev(sizeof(struct mlxsw_sp_port));
@@ -1258,6 +1259,12 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port)
        mlxsw_sp_port->learning_sync = 1;
        mlxsw_sp_port->uc_flood = 1;
        mlxsw_sp_port->pvid = 1;
+       bytes = DIV_ROUND_UP(VLAN_N_VID, BITS_PER_BYTE);
+       mlxsw_sp_port->active_vlans = kzalloc(bytes, GFP_KERNEL);
+       if (!mlxsw_sp_port->active_vlans) {
+               err = -ENOMEM;
+               goto err_port_active_vlans_alloc;
+       }
 
        mlxsw_sp_port->pcpu_stats =
                netdev_alloc_pcpu_stats(struct mlxsw_sp_port_pcpu_stats);
@@ -1359,6 +1366,8 @@ err_port_module_check:
 err_dev_addr_init:
        free_percpu(mlxsw_sp_port->pcpu_stats);
 err_alloc_stats:
+       kfree(mlxsw_sp_port->active_vlans);
+err_port_active_vlans_alloc:
        free_netdev(dev);
        return err;
 }
@@ -1381,6 +1390,7 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
        unregister_netdev(mlxsw_sp_port->dev); /* This calls ndo_stop */
        mlxsw_sp_port_switchdev_fini(mlxsw_sp_port);
        free_percpu(mlxsw_sp_port->pcpu_stats);
+       kfree(mlxsw_sp_port->active_vlans);
        free_netdev(mlxsw_sp_port->dev);
 }
 

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 48be5a6..608be6e 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -103,7 +103,7 @@ struct mlxsw_sp_port {
        u16 pvid;
        u16 lag_id;
        /* 802.1Q bridge VLANs */
-       unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+       unsigned long *active_vlans;
        /* VLAN interfaces */
        unsigned long active_vfids[BITS_TO_LONGS(VLAN_N_VID)];
        u16 nr_vfids;