[net-next v2 01/11] i40e: Fix for allowing too many MDD events on VF

[Jeff Kirsher]

From: Carolyn Wyborny <carolyn.wybo...@intel.com>

This patch changes the driver behavior when detecting a VF MDD event.
It now disables the VF after one event, which indicates a hw detected
problem in the VF.  Before this change, the PF would allow a couple of
events before doing the reset.

Signed-off-by: Carolyn Wyborny <carolyn.wybo...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c 
b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 65c2b9d2652b..b52a9d5644b8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9767,6 +9767,9 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf)
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "TX driver issue detected on 
VF %d\n",
                                 i);
+                       dev_info(&pf->pdev->dev,
+                                "Use PF Control I/F to re-enable the VF\n");
+                       set_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
                }
 
                reg = rd32(hw, I40E_VP_MDET_RX(i));
@@ -9775,11 +9778,6 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf)
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "RX driver issue detected on 
VF %d\n",
                                 i);
-               }
-
-               if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
-                       dev_info(&pf->pdev->dev,
-                                "Too many MDD events on VF %d, disabled\n", i);
                        dev_info(&pf->pdev->dev,
                                 "Use PF Control I/F to re-enable the VF\n");
                        set_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
-- 
2.20.1