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: f8c2524744b2 ("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>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 0c123d571b4cf52a0eb3b833208156766b5de6be..fe5546bb41537f0af0c4bcfe9054ccceaa42bbb2 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -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)