From: Alan Brady <alan.brady@intel.com>
Date: Wed, 27 Dec 2017 08:19:19 -0500
Subject: i40e: fix FW_LLDP flag on init
Patch-mainline: v4.16-rc1
Git-commit: 64e1dcbb581d31e411e10fa95d8963fb89d34bf2
References: bsc#1111981 FATE#326312

Using ethtool --set-priv-flags disable-fw-lldp <on/off> is persistent
across reboots/reloads so we need some mechanism in the driver to detect
if it's on or off on init so we can set the ethtool private flag
appropriately.  Without this, every time the driver is reloaded the flag
will default to off regardless of whether it's on or off in FW.

We detect this by first attempting to program DCB and if AQ fails
returning I40E_AQ_RC_EPERM, we know that LLDP is disabled in FW.

Signed-off-by: Alan Brady <alan.brady@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6351,6 +6351,9 @@ static int i40e_init_pf_dcb(struct i40e_
 			dev_dbg(&pf->pdev->dev,
 				"DCBX offload is supported for this PF.\n");
 		}
+	} else if (pf->hw.aq.asq_last_status == I40E_AQ_RC_EPERM) {
+		dev_info(&pf->pdev->dev, "FW LLDP disabled for this PF.\n");
+		pf->flags |= I40E_FLAG_DISABLE_FW_LLDP;
 	} else {
 		dev_info(&pf->pdev->dev,
 			 "Query for DCB configuration failed, err %s aq_err %s\n",