Commit e1a5ddc5 authored by Amir Vadai's avatar Amir Vadai Committed by David S. Miller

net/mlx4_core: Defer VF initialization till PF is fully initialized

Fix in commit [1] is not sufficient since a deferred VF initialization
could happen after pci_enable_sriov() is finished, but before the PF is
fully initialized.
Need to prevent VFs from initializing till the PF is fully ready and
comm channel is operational.

[1] - 97989356 "net/mlx4_core: mlx4_init_slave() shouldn't access comm
      channel before PF is ready"

CC: Stuart Hayes <Stuart_Hayes@Dell.com>
Signed-off-by: default avatarAmir Vadai <amirv@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 77d149c4
......@@ -2369,10 +2369,10 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data)
} else {
atomic_inc(&pf_loading);
err = pci_enable_sriov(pdev, total_vfs);
atomic_dec(&pf_loading);
if (err) {
mlx4_err(dev, "Failed to enable SR-IOV, continuing without SR-IOV (err = %d).\n",
err);
atomic_dec(&pf_loading);
err = 0;
} else {
mlx4_warn(dev, "Running in master mode\n");
......@@ -2532,6 +2532,9 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data)
priv->removed = 0;
if (mlx4_is_master(dev) && dev->num_vfs)
atomic_dec(&pf_loading);
return 0;
err_port:
......@@ -2582,6 +2585,9 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data)
if (!mlx4_is_slave(dev))
mlx4_free_ownership(dev);
if (mlx4_is_master(dev) && dev->num_vfs)
atomic_dec(&pf_loading);
kfree(priv->dev.dev_vfs);
err_free_dev:
......@@ -2675,6 +2681,7 @@ static void __mlx4_remove_one(struct pci_dev *pdev)
if (dev->flags & MLX4_FLAG_SRIOV) {
mlx4_warn(dev, "Disabling SR-IOV\n");
pci_disable_sriov(pdev);
dev->num_vfs = 0;
}
if (!mlx4_is_slave(dev))
......
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