i40e: Force register writes to mitigate sync issues with iwarp VF driver

Orabug: 24568124

This patch is a fix for the bug i.e. unable to create iwarp device
in VF. This is a sync issue and the iwarp device open is called even
before the PCI register writes are done.

Forcing the PCI register writes to happen just before it exits the
function.

Change-ID: I60c6a2c709da89e845f2764cc50ce8b7373c8c44
Signed-off-by: Avinash Dayanand <avinash.dayanand@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 70df973b5eb48b19ba29105ecfecb3e50efe3c6d)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_client.c b/drivers/net/ethernet/intel/i40e/i40e_client.c
index 0e6585eb1290b554eeb663f2dd967b65bb0539d1..0bf90b34c6d1f67695f4b6f4700e74babc78edca 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_client.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_client.c
@@ -793,7 +793,8 @@ static int i40e_client_setup_qvlist(struct i40e_info *ldev,
                        wr32(hw, I40E_PFINT_AEQCTL, reg);
                }
        }
-
+       /* Mitigate sync problems with iwarp VF driver */
+       i40e_flush(hw);
        return 0;
 err:
        kfree(ldev->qvlist_info);