i40e: Fix a bug where Rx would stop after some time

Move the setting of flow control because this should be done at a pf level not
a vsi level. Also add a sleep and restart an to fix a bug where Rx would stop
after some stress.

Change-ID: I9a93d8c2ff27c39339eb00bc4ec1225e43900be0
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 20 insertions, 4 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index f7464e87d521..ff6d94d4d1e0 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -4479,12 +4479,8 @@ static void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
 static int i40e_up_complete(struct i40e_vsi *vsi)
 {
         struct i40e_pf *pf = vsi->back;
-        u8 set_fc_aq_fail = 0;
         int err;
 
-        /* force flow control off */
-        i40e_set_fc(&pf->hw, &set_fc_aq_fail, true);
-
         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                 i40e_vsi_configure_msix(vsi);
         else
@@ -5958,6 +5954,7 @@ static void i40e_send_version(struct i40e_pf *pf)
 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
 {
         struct i40e_hw *hw = &pf->hw;
+        u8 set_fc_aq_fail = 0;
         i40e_status ret;
         u32 v;
 
@@ -6038,6 +6035,11 @@ static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
         if (ret)
                 dev_info(&pf->pdev->dev, "set phy mask fail, aq_err %d\n", ret);
 
+        /* make sure our flow control settings are restored */
+        ret = i40e_set_fc(&pf->hw, &set_fc_aq_fail, true);
+        if (ret)
+                dev_info(&pf->pdev->dev, "set fc fail, aq_err %d\n", ret);
+
         /* Rebuild the VSIs and VEBs that existed before reset.
          * They are still in our local switch element arrays, so only
          * need to rebuild the switch model in the HW.
@@ -6092,6 +6094,13 @@ static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
                 }
         }
 
+        msleep(75);
+        ret = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
+        if (ret) {
+                dev_info(&pf->pdev->dev, "link restart failed, aq_err=%d\n",
+                         pf->hw.aq.asq_last_status);
+        }
+
         /* reinit the misc interrupt */
         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                 ret = i40e_setup_misc_vector(pf);
@@ -9169,6 +9178,13 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         if (err)
                 dev_info(&pf->pdev->dev, "set phy mask fail, aq_err %d\n", err);
 
+        msleep(75);
+        err = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
+        if (err) {
+                dev_info(&pf->pdev->dev, "link restart failed, aq_err=%d\n",
+                         pf->hw.aq.asq_last_status);
+        }
+
         /* The main driver is (mostly) up and happy. We need to set this state
          * before setting up the misc vector or we get a race and the vector
          * ends up disabled forever.