> -----Original Message-----
> From: linux-pci-ow...@vger.kernel.org [mailto:linux-pci-
> ow...@vger.kernel.org] On Behalf Of Yinghai Lu
>
> Found kernel try to load mlx4 drivers for VFs before PF's is really loaded
> when the drivers are built-in, and kernel command line include
> probe_vfs=63, num_vfs=63.
>
> It turns that it also happen for hotadd path even drivers are compiled as
> modules and if they loaded. Esp some VF share the same driver with PF.
>
> calling path:
> device driver probe
> ==> pci_enable_sriov
> ==> virtfn_add
> ==> pci_dev_add
> ==> pci_bus_device_add
> when pci_bus_device_add is called, the VF's driver will be attached.
> and at that time PF's driver does not finish yet.
>
> Need to move out pci_bus_device_add from virtfn_add and call it later. Fix
> the problem for two path, 1. hotadd path: use device_schedule_callback.
> 2. for booting path, use initcall to call that for all VF's.
>
...
>
> Index: linux-2.6/drivers/net/ethernet/emulex/benet/be_main.c
> ==========================================================
> =========
> --- linux-2.6.orig/drivers/net/ethernet/emulex/benet/be_main.c
> +++ linux-2.6/drivers/net/ethernet/emulex/benet/be_main.c
> @@ -4119,6 +4119,7 @@ static int lancer_recover_func(struct be
> if (status)
> goto err;
>
> + pci_bus_add_device_vfs(adapter->pdev);
> if (netif_running(adapter->netdev)) {
> status = be_open(adapter->netdev);
> if (status)
> @@ -4335,6 +4336,8 @@ static int be_probe(struct pci_dev *pdev
> dev_info(&pdev->dev, "%s: %s %s port %c\n", nic_name(pdev),
> func_name(adapter), mc_name(adapter), port_name);
>
> + pci_bus_add_device_vfs(pdev);
> +
> return 0;
>
> unsetup:
> @@ -4406,6 +4409,7 @@ static int be_resume(struct pci_dev *pde
> rtnl_unlock();
> }
>
> + pci_bus_add_device_vfs(adapter->pdev);
> schedule_delayed_work(&adapter->func_recovery_work,
> msecs_to_jiffies(1000));
> netif_device_attach(netdev);
I fixed this issue in be2net with the following patch (commit b4c1df93)
http://marc.info/?l=linux-netdev&m=136801459808765&w=2
-Sathya
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