From: Harshitha Ramamurthy <harshitha.ramamurthy@intel.com>
Date: Thu, 28 Feb 2019 09:52:55 -0800
Subject: i40e: fix misleading message about promisc setting on un-trusted VF
Patch-mainline: v5.2-rc1
Git-commit: 1e8468275284a22c403fcf8a7fe82140a270d461
References: jsc#SLE-4797

A refactor of the i40e_vc_config_promiscuous_mode_msg function moved
the check for un-trusted VF into another function. We have to lie to
an un-trusted VF that its request to set promiscuous mode is
successful even when it is not because we don't want the VF to find
out its trust status this way. With the refactor, we were running into
a case where even though we were not setting promiscuous mode for an
un-trusted VF, we still printed a misleading message that it was
successful.

This patch fixes that by ensuring that a success message is printed
on the host side only when the promiscuous mode change has been
successful.

Signed-off-by: Harshitha Ramamurthy <harshitha.ramamurthy@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_virtchnl_pf.c |   28 ++++++++++++---------
 1 file changed, 16 insertions(+), 12 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1135,15 +1135,6 @@ static i40e_status i40e_config_vf_promis
 	if (!i40e_vc_isvalid_vsi_id(vf, vsi_id) || !vsi)
 		return I40E_ERR_PARAM;
 
-	if (!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps) &&
-	    (allmulti || alluni)) {
-		dev_err(&pf->pdev->dev,
-			"Unprivileged VF %d is attempting to configure promiscuous mode\n",
-			vf->vf_id);
-		/* Lie to the VF on purpose. */
-		return 0;
-	}
-
 	if (vf->port_vlan_id) {
 		aq_ret = i40e_aq_set_vsi_mc_promisc_on_vlan(hw, vsi->seid,
 							    allmulti,
@@ -2020,8 +2011,21 @@ static int i40e_vc_config_promiscuous_mo
 	bool allmulti = false;
 	bool alluni = false;
 
-	if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states))
-		return I40E_ERR_PARAM;
+	if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
+		aq_ret = I40E_ERR_PARAM;
+		goto err_out;
+	}
+	if (!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) {
+		dev_err(&pf->pdev->dev,
+			"Unprivileged VF %d is attempting to configure promiscuous mode\n",
+			vf->vf_id);
+
+		/* Lie to the VF on purpose, because this is an error we can
+		 * ignore. Unprivileged VF is not a virtual channel error.
+		 */
+		aq_ret = 0;
+		goto err_out;
+	}
 
 	/* Multicast promiscuous handling*/
 	if (info->flags & FLAG_VF_MULTICAST_PROMISC)
@@ -2055,7 +2059,7 @@ static int i40e_vc_config_promiscuous_mo
 			clear_bit(I40E_VF_STATE_UC_PROMISC, &vf->vf_states);
 		}
 	}
-
+err_out:
 	/* send the response to the VF */
 	return i40e_vc_send_resp_to_vf(vf,
 				       VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,