e1000e: keep Rx/Tx HW_VLAN_CTAG in sync

The bit in the e1000 driver that mentions explicitly that the hardware
has no support for separate RX/TX VLAN accel toggling rings true for
e1000e as well, and thus both NETIF_F_HW_VLAN_CTAG_RX and
NETIF_F_HW_VLAN_CTAG_TX need to be kept in sync.

Revert a portion of commit 889ad456660461 ("e1000e: keep VLAN interfaces
functional after rxvlan off") since keeping the bits in sync resolves
the original issue.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 73f7452..2b2e2f8 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -154,16 +154,6 @@ void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val)
        writel(val, hw->hw_addr + reg);
 }
 
-static bool e1000e_vlan_used(struct e1000_adapter *adapter)
-{
-       u16 vid;
-
-       for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
-               return true;
-
-       return false;
-}
-
 /**
  * e1000_regdump - register printout routine
  * @hw: pointer to the HW structure
@@ -3453,8 +3443,7 @@ static void e1000e_set_rx_mode(struct net_device *netdev)
 
        ew32(RCTL, rctl);
 
-       if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX ||
-           e1000e_vlan_used(adapter))
+       if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
                e1000e_vlan_strip_enable(adapter);
        else
                e1000e_vlan_strip_disable(adapter);
@@ -6926,6 +6915,14 @@ static netdev_features_t e1000_fix_features(struct net_device *netdev,
        if ((hw->mac.type >= e1000_pch2lan) && (netdev->mtu > ETH_DATA_LEN))
                features &= ~NETIF_F_RXFCS;
 
+       /* Since there is no support for separate Rx/Tx vlan accel
+        * enable/disable make sure Tx flag is always in same state as Rx.
+        */
+       if (features & NETIF_F_HW_VLAN_CTAG_RX)
+               features |= NETIF_F_HW_VLAN_CTAG_TX;
+       else
+               features &= ~NETIF_F_HW_VLAN_CTAG_TX;
+
        return features;
 }