ixgbe: set driver_max_VFs should be done before enabling SRIOV

commit 43dc4e01 Limit number of reported VFs to device specific value It doesn't work and always returns -EBUSY because VFs ware already enabled.

ixgbe_enable_sriov()

         pci_enable_sriov()
                 sriov_enable()
                 {
                 ... ..
                 iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE;
                 pci_cfg_access_lock(dev);
                 ... ...
                 }

pci_sriov_set_totalvfs()
{
... ...
if (dev->sriov->ctrl & PCI_SRIOV_CTRL_VFE)

                 return -EBUSY;

...
}

So should set driver_max_VFs with pci_sriov_set_totalvfs() before enable VFs with ixgbe_enable_sriov().

V2: revised for net-next tree.

---
  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index bea2cec..6e6af0d 100644

@@ -7972,8 +7972,8 @@ static int ixgbe_probe(struct pci_dev *pdev, const 

struct pci_device_id *ent)

      /* Mailbox */
      ixgbe_init_mbx_params_pf(hw);
      memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
-    ixgbe_enable_sriov(adapter);
      pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);

+ ixgbe_enable_sriov(adapter);
skip_sriov:

#endif

1.7.1


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