From: Carolyn Wyborny <carolyn.wyborny@intel.com>
Date: Thu, 28 Feb 2019 09:52:47 -0800
Subject: i40e: Fix for allowing too many MDD events on VF
Patch-mainline: v5.2-rc1
Git-commit: a7da7f16267b96cfd0bf753e1733080ef71e6b66
References: jsc#SLE-4797

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.wyborny@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9832,6 +9832,9 @@ static void i40e_handle_mdd_event(struct
 			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));
@@ -9840,11 +9843,6 @@ static void i40e_handle_mdd_event(struct
 			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);