diff options
| author | Yevgeny Petrilin <yevgenyp@mellanox.co.il> | 2011-10-18 01:50:29 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-19 03:42:26 -0400 |
| commit | e72ebf5a578464204c8418d7d9b375333bb33161 (patch) | |
| tree | 9a31012872207aef3d0dae1bd2e17dfb169f1e27 /drivers/net/ethernet | |
| parent | 5ea2ef5f8b006ff9e970327e7fea78f1f5841c44 (diff) | |
mlx4: Fix vlan table overflow
Prevent overflow when trying to register more Vlans then the Vlan table in
HW is configured to.
Need to take into acount that the first 2 entries are reserved.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/port.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c index 609e0ec14ce..163a314c148 100644 --- a/drivers/net/ethernet/mellanox/mlx4/port.c +++ b/drivers/net/ethernet/mellanox/mlx4/port.c @@ -65,7 +65,7 @@ void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table) table->entries[i] = 0; table->refs[i] = 0; } - table->max = 1 << dev->caps.log_num_vlans; + table->max = (1 << dev->caps.log_num_vlans) - MLX4_VLAN_REGULAR; table->total = 0; } @@ -354,6 +354,13 @@ int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index) int free = -1; mutex_lock(&table->mutex); + + if (table->total == table->max) { + /* No free vlan entries */ + err = -ENOSPC; + goto out; + } + for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) { if (free < 0 && (table->refs[i] == 0)) { free = i; @@ -375,12 +382,6 @@ int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index) goto out; } - if (table->total == table->max) { - /* No free vlan entries */ - err = -ENOSPC; - goto out; - } - /* Register new MAC */ table->refs[free] = 1; table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID); |