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net/mlx5: Tolerate irq_set_affinity_hint() failures 

Add tolerance to failures of irq_set_affinity_hint().
Its role is to give hints that optimizes performance,
and should not block the driver load.

In non-SMP systems, functionality is not available as
there is a single core, and all these calls definitely
fail.  Hence, do not call the function and avoid the
warning prints.

Fixes: db058a186f ("net/mlx5_core: Set irq affinity hints")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2017-05-18 13:34:43 +03:00 committed by Saeed Mahameed
parent 73dd3a4839
commit b665d98edc
1 changed files with 4 additions and 11 deletions
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15
drivers/net/ethernet/mellanox/mlx5/core/main.c
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@ -612,7 +612,6 @@ static int mlx5_irq_set_affinity_hint(struct mlx5_core_dev *mdev, int i)
struct mlx5_priv *priv = &mdev->priv;
struct msix_entry *msix = priv->msix_arr;
int irq = msix[i + MLX5_EQ_VEC_COMP_BASE].vector;
int err;
if (!zalloc_cpumask_var(&priv->irq_info[i].mask, GFP_KERNEL)) {
mlx5_core_warn(mdev, "zalloc_cpumask_var failed");
@ -622,18 +621,12 @@ static int mlx5_irq_set_affinity_hint(struct mlx5_core_dev *mdev, int i)
cpumask_set_cpu(cpumask_local_spread(i, priv->numa_node),
priv->irq_info[i].mask);
err = irq_set_affinity_hint(irq, priv->irq_info[i].mask);
if (err) {
mlx5_core_warn(mdev, "irq_set_affinity_hint failed,irq 0x%.4x",
irq);
goto err_clear_mask;
}
#ifdef CONFIG_SMP
if (irq_set_affinity_hint(irq, priv->irq_info[i].mask))
mlx5_core_warn(mdev, "irq_set_affinity_hint failed, irq 0x%.4x", irq);
#endif
return 0;
err_clear_mask:
free_cpumask_var(priv->irq_info[i].mask);
return err;
}
static void mlx5_irq_clear_affinity_hint(struct mlx5_core_dev *mdev, int i)