diff options
| author | Matan Barak <matanb@mellanox.com> | 2014-12-14 16:18:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-15 11:34:53 -0500 |
| commit | da315679e80635021e98de1306ff4eee0759ba57 (patch) | |
| tree | 35ce69487bed726b3225d9bd320dd80d50e6a328 /drivers/net | |
| parent | 67e2c3883828b39548cee2091b36656787775d95 (diff) | |
net/mlx4_core: Fixed memory leak and incorrect refcount in mlx4_load_one
The current mlx4_load_one has a memory leak as it always allocates
dev_cap, but frees it only on error.
In addition, even if VFs exist when mlx4_load_one is called,
we still need to notify probed VFs that we're loading (by
incrementing pf_loading).
Fixes: a0eacca948d2 ('net/mlx4_core: Refactor mlx4_load_one')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/main.c | 61 |
1 files changed, 33 insertions, 28 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index e25436b24ce7..c2ef266ad7c1 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -2488,41 +2488,42 @@ static u64 mlx4_enable_sriov(struct mlx4_dev *dev, struct pci_dev *pdev, u8 total_vfs, int existing_vfs) { u64 dev_flags = dev->flags; + int err = 0; - dev->dev_vfs = kzalloc( - total_vfs * sizeof(*dev->dev_vfs), - GFP_KERNEL); + atomic_inc(&pf_loading); + if (dev->flags & MLX4_FLAG_SRIOV) { + if (existing_vfs != total_vfs) { + mlx4_err(dev, "SR-IOV was already enabled, but with num_vfs (%d) different than requested (%d)\n", + existing_vfs, total_vfs); + total_vfs = existing_vfs; + } + } + + dev->dev_vfs = kzalloc(total_vfs * sizeof(*dev->dev_vfs), GFP_KERNEL); if (NULL == dev->dev_vfs) { mlx4_err(dev, "Failed to allocate memory for VFs\n"); goto disable_sriov; - } else if (!(dev->flags & MLX4_FLAG_SRIOV)) { - int err = 0; - - atomic_inc(&pf_loading); - if (existing_vfs) { - if (existing_vfs != total_vfs) - mlx4_err(dev, "SR-IOV was already enabled, but with num_vfs (%d) different than requested (%d)\n", - existing_vfs, total_vfs); - } else { - mlx4_warn(dev, "Enabling SR-IOV with %d VFs\n", total_vfs); - err = pci_enable_sriov(pdev, total_vfs); - } - if (err) { - mlx4_err(dev, "Failed to enable SR-IOV, continuing without SR-IOV (err = %d)\n", - err); - atomic_dec(&pf_loading); - goto disable_sriov; - } else { - mlx4_warn(dev, "Running in master mode\n"); - dev_flags |= MLX4_FLAG_SRIOV | - MLX4_FLAG_MASTER; - dev_flags &= ~MLX4_FLAG_SLAVE; - dev->num_vfs = total_vfs; - } + } + + if (!(dev->flags & MLX4_FLAG_SRIOV)) { + mlx4_warn(dev, "Enabling SR-IOV with %d VFs\n", total_vfs); + err = pci_enable_sriov(pdev, total_vfs); + } + if (err) { + mlx4_err(dev, "Failed to enable SR-IOV, continuing without SR-IOV (err = %d)\n", + err); + goto disable_sriov; + } else { + mlx4_warn(dev, "Running in master mode\n"); + dev_flags |= MLX4_FLAG_SRIOV | + MLX4_FLAG_MASTER; + dev_flags &= ~MLX4_FLAG_SLAVE; + dev->num_vfs = total_vfs; } return dev_flags; disable_sriov: + atomic_dec(&pf_loading); dev->num_vfs = 0; kfree(dev->dev_vfs); return dev_flags & ~MLX4_FLAG_MASTER; @@ -2606,8 +2607,10 @@ static int mlx4_load_one(struct pci_dev *pdev, int pci_dev_data, } if (total_vfs) { - existing_vfs = pci_num_vf(pdev); dev->flags = MLX4_FLAG_MASTER; + existing_vfs = pci_num_vf(pdev); + if (existing_vfs) + dev->flags |= MLX4_FLAG_SRIOV; dev->num_vfs = total_vfs; } } @@ -2643,6 +2646,7 @@ slave_start: } if (mlx4_is_master(dev)) { + /* when we hit the goto slave_start below, dev_cap already initialized */ if (!dev_cap) { dev_cap = kzalloc(sizeof(*dev_cap), GFP_KERNEL); @@ -2849,6 +2853,7 @@ slave_start: if (mlx4_is_master(dev) && dev->num_vfs) atomic_dec(&pf_loading); + kfree(dev_cap); return 0; err_port: |