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net/mlx4_core: Add extra check for total vfs for SRIOV

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Add extra check for total vfs for SRIOV to check if that value is
bigger than total vfs in pci SRIOV capabalities. Fix a check and
print of the number of maximum vfs that hw can handle. Fix a check
and print of the number of maximum vfs per port that driver can handle.

Signed-off-by: Carol L Soto <clsoto@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Carol Soto 2015-07-06 09:20:19 -05:00 committed by David S. Miller
parent d912557b34
commit 0beb44b065
1 changed files with 14 additions and 6 deletions
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20
drivers/net/ethernet/mellanox/mlx4/main.c
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@ -2907,6 +2907,8 @@ static u64 mlx4_enable_sriov(struct mlx4_dev *dev, struct pci_dev *pdev,
{
u64 dev_flags = dev->flags;
int err = 0;
int fw_enabled_sriov_vfs = min(pci_sriov_get_totalvfs(pdev),
MLX4_MAX_NUM_VF);
if (reset_flow) {
dev->dev_vfs = kcalloc(total_vfs, sizeof(*dev->dev_vfs),
@ -2932,6 +2934,12 @@ static u64 mlx4_enable_sriov(struct mlx4_dev *dev, struct pci_dev *pdev,
}
if (!(dev->flags & MLX4_FLAG_SRIOV)) {
if (total_vfs > fw_enabled_sriov_vfs) {
mlx4_err(dev, "requested vfs (%d) > available vfs (%d). Continuing without SR_IOV\n",
total_vfs, fw_enabled_sriov_vfs);
err = -ENOMEM;
goto disable_sriov;
}
mlx4_warn(dev, "Enabling SR-IOV with %d VFs\n", total_vfs);
err = pci_enable_sriov(pdev, total_vfs);
}
@ -3413,20 +3421,20 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data,
goto err_disable_pdev;
}
}
if (total_vfs >= MLX4_MAX_NUM_VF) {
if (total_vfs > MLX4_MAX_NUM_VF) {
dev_err(&pdev->dev,
"Requested more VF's (%d) than allowed (%d)\n",
total_vfs, MLX4_MAX_NUM_VF - 1);
"Requested more VF's (%d) than allowed by hw (%d)\n",
total_vfs, MLX4_MAX_NUM_VF);
err = -EINVAL;
goto err_disable_pdev;
}
for (i = 0; i < MLX4_MAX_PORTS; i++) {
if (nvfs[i] + nvfs[2] >= MLX4_MAX_NUM_VF_P_PORT) {
if (nvfs[i] + nvfs[2] > MLX4_MAX_NUM_VF_P_PORT) {
dev_err(&pdev->dev,
"Requested more VF's (%d) for port (%d) than allowed (%d)\n",
"Requested more VF's (%d) for port (%d) than allowed by driver (%d)\n",
nvfs[i] + nvfs[2], i + 1,
MLX4_MAX_NUM_VF_P_PORT - 1);
MLX4_MAX_NUM_VF_P_PORT);
err = -EINVAL;
goto err_disable_pdev;
}