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mlx4: Fix tx ring affinity_mask creation

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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 <bpoirier@suse.de>
Acked-by: Ido Shamay <idos@mellanox.com>
Fixes: d03a68f ("net/mlx4_en: Configure the XPS queue mapping on driver load")
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin Poirier 2015-04-28 14:49:29 -07:00 committed by David S. Miller
parent 0d699f28ee
commit 42eab005a5
1 changed files with 5 additions and 3 deletions
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8
drivers/net/ethernet/mellanox/mlx4/en_tx.c
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@ -143,8 +143,10 @@ 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;
@ -213,7 +215,7 @@ 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);