i40e: Fix the EMPR interrupt received handling

We shouldn't trigger another EMPR when we receive an EMPR event.
This patch handles EMPR event reception with a different state
so that we can do the right thing for NVM.

Change-ID: I9cac70b3658600f016a65beb6fb157e1c1f9adf9
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e.h

@@ -140,6 +140,7 @@ enum i40e_state_t {
 	__I40E_CORE_RESET_REQUESTED,
 	__I40E_GLOBAL_RESET_REQUESTED,
 	__I40E_EMP_RESET_REQUESTED,
+	__I40E_EMP_RESET_INTR_RECEIVED,
 	__I40E_FILTER_OVERFLOW_PROMISC,
 	__I40E_SUSPENDED,
 	__I40E_PTP_TX_IN_PROGRESS,

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

@@ -3171,7 +3171,7 @@ static irqreturn_t i40e_intr(int irq, void *data)
 			pf->globr_count++;
 		} else if (val == I40E_RESET_EMPR) {
 			pf->empr_count++;
-			set_bit(__I40E_EMP_RESET_REQUESTED, &pf->state);
+			set_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state);
 		}
 	}
 
@@ -6179,10 +6179,8 @@ static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
 	}
 
 	/* re-verify the eeprom if we just had an EMP reset */
-	if (test_bit(__I40E_EMP_RESET_REQUESTED, &pf->state)) {
-		clear_bit(__I40E_EMP_RESET_REQUESTED, &pf->state);
+	if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state))
 		i40e_verify_eeprom(pf);
-	}
 
 	i40e_clear_pxe_mode(hw);
 	ret = i40e_get_capabilities(pf);