i40e: Fix firmware LLDP agent related warning

Make warning meaningful for the user.

Previously the trace:
"Starting FW LLDP agent failed: error: I40E_ERR_ADMIN_QUEUE_ERROR, I40E_AQ_RC_EAGAIN"
was produced when user tried to start Firmware LLDP agent,
just after it was stopped with sequence:
ethtool --set-priv-flags <dev> disable-fw-lldp on
ethtool --set-priv-flags <dev> disable-fw-lldp off
(without any delay between the commands)
At that point the firmware is still processing stop command, the behavior
is expected.

Fixes: c1041d070437 ("i40e: Missing response checks in driver when starting/stopping FW LLDP")
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Imam Hassan Reza Biswas <imam.hassan.reza.biswas@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 3e822ba..d9e26f9 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -5294,6 +5294,10 @@ flags_complete:
                                        dev_warn(&pf->pdev->dev,
                                                 "Device configuration forbids SW from starting the LLDP agent.\n");
                                        return -EINVAL;
+                               case I40E_AQ_RC_EAGAIN:
+                                       dev_warn(&pf->pdev->dev,
+                                                "Stop FW LLDP agent command is still being processed, please try again in a second.\n");
+                                       return -EBUSY;
                                default:
                                        dev_warn(&pf->pdev->dev,
                                                 "Starting FW LLDP agent failed: error: %s, %s\n",