i40evf: resend FW request if no response

Sometimes the firmware will not indicate an error but fail to pass a
message between the VF and the PF driver. If this happens, just resend
the request.

This fixes an initialization failure if many VFs are instantiated at the
same time and the VF module is autoloaded.

Change-ID: Idd1ad8da2fd5137859244685c355941427d317d7
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 7138ab483625ec24c9617a2902ba1f771926aea0..8082a9fa5d10b4658e0a7a9a09f2a76e090663a1 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -2018,6 +2018,10 @@ static void i40evf_init_task(struct work_struct *work)
                if (err) {
                        dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
                                err);
+                       if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
+                               dev_info(&pdev->dev, "Resending request\n");
+                               err = i40evf_send_api_ver(adapter);
+                       }
                        goto err;
                }
                err = i40evf_send_vf_config_msg(adapter);