i40e: Fix for allowing too many MDD events on VF (a7da7f16) · Commits · 戴 / test

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>

drivers/net/ethernet/intel/i40e/i40e_main.c

+3 −5

Original line number	Diff line number	Diff line
		@@ -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);

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