netdev - [net 03/11] net/mlx5: Fix memory leak in bad flow of mlx5_alloc_irq

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Date:   Fri, 12 Jan 2018 02:37:15 +0200
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Alaa Hleihel <alaa@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net 03/11] net/mlx5: Fix memory leak in bad flow of mlx5_alloc_irq_vectors

From: Alaa Hleihel <alaa@...lanox.com>

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@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/main.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 95e188d0883e..a4c82fa71aec 100644
--- 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)
-- 
2.13.0