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>

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 2b65cdc..5912fdf 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/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,

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 2260cc1..652cb4e 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/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);