netdev - [net-next 03/15] i40evf: Allow turning off offloads when the VF has VLAN set

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Date:   Fri, 26 Jan 2018 13:24:47 -0800
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Paweł Jabłoński 
        <pawel.jablonski@...el.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 03/15] i40evf: Allow turning off offloads when the VF has VLAN set

From: Paweł Jabłoński <pawel.jablonski@...el.com>

This patch adds back the capability to turn off offloads when VF has
VLAN set. The commit 0a3b4f702fb1 ("i40evf: enable support for VF VLAN
tag stripping control") adds the i40evf_set_features function and
changes the 'turn off' flow for offloads. This patch adds that
capability back by moving checking the VLAN option for VF to the
next statement.

Signed-off-by: Paweł Jabłoński <pawel.jablonski@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40evf/i40evf_main.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 8934f784e96f..d59bf060196b 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -2344,13 +2344,19 @@ static int i40evf_set_features(struct net_device *netdev,
 {
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 
-	if (!VLAN_ALLOWED(adapter))
+	/* Don't allow changing VLAN_RX flag when VLAN is set for VF
+	 * and return an error in this case
+	 */
+	if (VLAN_ALLOWED(adapter)) {
+		if (features & NETIF_F_HW_VLAN_CTAG_RX)
+			adapter->aq_required |=
+				I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
+		else
+			adapter->aq_required |=
+				I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;
+	} else if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX) {
 		return -EINVAL;
-
-	if (features & NETIF_F_HW_VLAN_CTAG_RX)
-		adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
-	else
-		adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;
+	}
 
 	return 0;
 }
-- 
2.14.3