Commit 0502c51a authored by Benjamin Poirier's avatar Benjamin Poirier Committed by Luis Henriques

mlx4: Fix tx ring affinity_mask creation

commit 42eab005 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: default avatarBenjamin Poirier <bpoirier@suse.de>
Acked-by: default avatarIdo Shamay <idos@mellanox.com>
Fixes: d03a68f8 ("net/mlx4_en: Configure the XPS queue mapping on driver load")
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent 56a11552
......@@ -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);
......
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