3.16.7-ckt12 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Benjamin Poirier <[email protected]> commit 42eab005a5dd5d7ea2b0328aecc4d6cc0c23c9c2 upstream. By default, the number of tx queues is limited by the number of online cpus in mlx4_en_get_profile(). However, this limit no longer holds after the ethtool .set_channels method has been called. In that situation, the driver may access invalid bits of certain cpumask variables when queue_index >= nr_cpu_ids. Signed-off-by: Benjamin Poirier <[email protected]> Acked-by: Ido Shamay <[email protected]> Fixes: d03a68f ("net/mlx4_en: Configure the XPS queue mapping on driver load") Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Luis Henriques <[email protected]> --- drivers/net/ethernet/mellanox/mlx4/en_tx.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c index 0610c85d4371..8068b0557c5a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c @@ -132,8 +132,10 @@ int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv, ring->hwtstamp_tx_type = priv->hwtstamp_config.tx_type; ring->queue_index = queue_index; - if (queue_index < priv->num_tx_rings_p_up && cpu_online(queue_index)) - cpumask_set_cpu(queue_index, &ring->affinity_mask); + if (queue_index < priv->num_tx_rings_p_up) + cpumask_set_cpu_local_first(queue_index, + priv->mdev->dev->numa_node, + &ring->affinity_mask); *pring = ring; return 0; @@ -200,7 +202,7 @@ int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv, err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, &ring->context, &ring->qp, &ring->qp_state); - if (!user_prio && cpu_online(ring->queue_index)) + if (!cpumask_empty(&ring->affinity_mask)) netif_set_xps_queue(priv->dev, &ring->affinity_mask, ring->queue_index); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
