net/mlx5: Fix memory leak in bad flow of mlx5_alloc_irq_vectors

Fix a memory leak where in case that pci_alloc_irq_vectors failed,
priv->irq_info was not released.

Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Alaa Hleihel <alaa@mellanox.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 95e188d0883e1faa5d93f92b668975d266d36600..a4c82fa71aec4221e0652f7b58559b76bf380cbc 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -319,6 +319,7 @@ static int mlx5_alloc_irq_vectors(struct mlx5_core_dev *dev)
        struct mlx5_eq_table *table = &priv->eq_table;
        int num_eqs = 1 << MLX5_CAP_GEN(dev, log_max_eq);
        int nvec;
+       int err;
 
        nvec = MLX5_CAP_GEN(dev, num_ports) * num_online_cpus() +
               MLX5_EQ_VEC_COMP_BASE;
@@ -328,21 +329,23 @@ static int mlx5_alloc_irq_vectors(struct mlx5_core_dev *dev)
 
        priv->irq_info = kcalloc(nvec, sizeof(*priv->irq_info), GFP_KERNEL);
        if (!priv->irq_info)
-               goto err_free_msix;
+               return -ENOMEM;
 
        nvec = pci_alloc_irq_vectors(dev->pdev,
                        MLX5_EQ_VEC_COMP_BASE + 1, nvec,
                        PCI_IRQ_MSIX);
-       if (nvec < 0)
-               return nvec;
+       if (nvec < 0) {
+               err = nvec;
+               goto err_free_irq_info;
+       }
 
        table->num_comp_vectors = nvec - MLX5_EQ_VEC_COMP_BASE;
 
        return 0;
 
-err_free_msix:
+err_free_irq_info:
        kfree(priv->irq_info);
-       return -ENOMEM;
+       return err;
 }
 
 static void mlx5_free_irq_vectors(struct mlx5_core_dev *dev)