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i40e: change behavior on PF in response to MDD event

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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: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Carolyn Wyborny 2019-02-28 09:52:48 -08:00 committed by Jeff Kirsher
parent a7da7f1626
commit a1df906c5b
1 changed files with 2 additions and 10 deletions
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12
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -9696,7 +9696,6 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf)
{ {
struct i40e_hw *hw = &pf->hw; struct i40e_hw *hw = &pf->hw;
bool mdd_detected = false; bool mdd_detected = false;
bool pf_mdd_detected = false;
struct i40e_vf *vf; struct i40e_vf *vf;
u32 reg; u32 reg;
int i; int i;
@ -9742,19 +9741,12 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf)
reg = rd32(hw, I40E_PF_MDET_TX); reg = rd32(hw, I40E_PF_MDET_TX);
if (reg & I40E_PF_MDET_TX_VALID_MASK) { if (reg & I40E_PF_MDET_TX_VALID_MASK) {
wr32(hw, I40E_PF_MDET_TX, 0xFFFF); wr32(hw, I40E_PF_MDET_TX, 0xFFFF);
dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n"); dev_dbg(&pf->pdev->dev, "TX driver issue detected on PF\n");
pf_mdd_detected = true;
} }
reg = rd32(hw, I40E_PF_MDET_RX); reg = rd32(hw, I40E_PF_MDET_RX);
if (reg & I40E_PF_MDET_RX_VALID_MASK) { if (reg & I40E_PF_MDET_RX_VALID_MASK) {
wr32(hw, I40E_PF_MDET_RX, 0xFFFF); wr32(hw, I40E_PF_MDET_RX, 0xFFFF);
dev_info(&pf->pdev->dev, "RX driver issue detected, PF reset issued\n"); dev_dbg(&pf->pdev->dev, "RX driver issue detected on PF\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);
} }
} }