diff options
| author | Rana Shahout | 2015-08-23 15:12:14 +0200 |
|---|---|---|
| committer | David S. Miller | 2015-08-25 22:45:09 +0200 |
| commit | 5283af899adec1a7765e413e43b27a335fadac5d (patch) | |
| tree | 00d5c753c8b2b25a6471743a6b7d459a853c4a9b /drivers/net/ethernet/mellanox/mlx5/core/en_main.c | |
| parent | ah4: Fix error return in ah_input(). (diff) | |
| download | kernel-qcow2-linux-5283af899adec1a7765e413e43b27a335fadac5d.tar.gz kernel-qcow2-linux-5283af899adec1a7765e413e43b27a335fadac5d.tar.xz kernel-qcow2-linux-5283af899adec1a7765e413e43b27a335fadac5d.zip | |
net/mlx5e: Avoid accessing NULL pointer at ndo_select_queue
To avoid multiply/division operations on the data path,
we hold a {channel, tc}==>txq mapping table.
We held this mapping table inside the channel object that is
being destroyed upon some configuration operations (e.g MTU change).
So in case ndo_select_queue occurs during such a configuration operation,
it may access a NULL channel pointer, resulting in kernel panic.
To fix this issue we moved the {channel, tc}==>txq mapping table
outside the channel object so that it will be available also
during such configuration operations.
Signed-off-by: Rana Shahout <ranas@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_main.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 55166dd5b4ea..59874d666cff 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -949,13 +949,13 @@ static void mlx5e_close_sqs(struct mlx5e_channel *c) mlx5e_close_sq(&c->sq[tc]); } -static void mlx5e_build_tc_to_txq_map(struct mlx5e_channel *c, - int num_channels) +static void mlx5e_build_channeltc_to_txq_map(struct mlx5e_priv *priv, int ix) { int i; for (i = 0; i < MLX5E_MAX_NUM_TC; i++) - c->tc_to_txq_map[i] = c->ix + i * num_channels; + priv->channeltc_to_txq_map[ix][i] = + ix + i * priv->params.num_channels; } static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix, @@ -979,7 +979,7 @@ static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix, c->mkey_be = cpu_to_be32(priv->mr.key); c->num_tc = priv->params.num_tc; - mlx5e_build_tc_to_txq_map(c, priv->params.num_channels); + mlx5e_build_channeltc_to_txq_map(priv, ix); netif_napi_add(netdev, &c->napi, mlx5e_napi_poll, 64); |