Commit a1df906c authored by Carolyn Wyborny's avatar Carolyn Wyborny Committed by Jeff Kirsher
Browse files

i40e: change behavior on PF in response to MDD event 



TX MDD events reported on the PF are the result of the
PF misconfiguring a descriptor and not because of "bad actions"
by anything else.  No need to reset now because if it
results in a Tx hang, the Tx hang check will take care of it.

Signed-off-by: default avatarCarolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent a7da7f16

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

+2 −10
Original line number Diff line number Diff line
@@ -9696,7 +9696,6 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf) 
{

	struct i40e_hw *hw = &pf->hw;

	bool mdd_detected = false;

	bool pf_mdd_detected = false;

	struct i40e_vf *vf;

	u32 reg;

	int i;
@@ -9742,19 +9741,12 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf) 
		reg = rd32(hw, I40E_PF_MDET_TX);

		if (reg & I40E_PF_MDET_TX_VALID_MASK) {

			wr32(hw, I40E_PF_MDET_TX, 0xFFFF);

			dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n");

			pf_mdd_detected = true;

			dev_dbg(&pf->pdev->dev, "TX driver issue detected on PF\n");

		}

		reg = rd32(hw, I40E_PF_MDET_RX);

		if (reg & I40E_PF_MDET_RX_VALID_MASK) {

			wr32(hw, I40E_PF_MDET_RX, 0xFFFF);

			dev_info(&pf->pdev->dev, "RX driver issue detected, PF reset issued\n");

			pf_mdd_detected = true;

		}

		/* Queue belongs to the PF, initiate a reset */

		if (pf_mdd_detected) {

			set_bit(__I40E_PF_RESET_REQUESTED, pf->state);

			i40e_service_event_schedule(pf);

			dev_dbg(&pf->pdev->dev, "RX driver issue detected on PF\n");

		}

	}

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