ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths

When I was adding the code for enabling VLAN promiscuous mode with SR-IOV
enabled I had inadvertently left the VLNCTRL.VFE bit unchanged as I has
assumed there was code in another path that was setting it when we enabled
SR-IOV.  This wasn't the case and as a result we were just disabling VLAN
filtering for all the VFs apparently.

Also the previous patches were always clearing CFIEN which was always set
to 0 by the hardware anyway so I am dropping the redundant bit clearing.

Fixes: 16369564915a ("ixgbe: Add support for VLAN promiscuous with SR-IOV")
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 5418c69..e0fdef8 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -4100,6 +4100,8 @@ static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
        struct ixgbe_hw *hw = &adapter->hw;
        u32 vlnctrl, i;
 
+       vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
+
        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
@@ -4112,8 +4114,7 @@ static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
                /* fall through */
        case ixgbe_mac_82598EB:
                /* legacy case, we can just disable VLAN filtering */
-               vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
-               vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
+               vlnctrl &= ~IXGBE_VLNCTRL_VFE;
                IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
                return;
        }
@@ -4125,6 +4126,10 @@ static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
        /* Set flag so we don't redo unnecessary work */
        adapter->flags2 |= IXGBE_FLAG2_VLAN_PROMISC;
 
+       /* For VMDq and SR-IOV we must leave VLAN filtering enabled */
+       vlnctrl |= IXGBE_VLNCTRL_VFE;
+       IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
+
        /* Add PF to all active pools */
        for (i = IXGBE_VLVF_ENTRIES; --i;) {
                u32 reg_offset = IXGBE_VLVFB(i * 2 + VMDQ_P(0) / 32);
@@ -4191,6 +4196,11 @@ static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
        struct ixgbe_hw *hw = &adapter->hw;
        u32 vlnctrl, i;
 
+       /* Set VLAN filtering to enabled */
+       vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
+       vlnctrl |= IXGBE_VLNCTRL_VFE;
+       IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
+
        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
@@ -4202,10 +4212,6 @@ static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
                        break;
                /* fall through */
        case ixgbe_mac_82598EB:
-               vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
-               vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
-               vlnctrl |= IXGBE_VLNCTRL_VFE;
-               IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
                return;
        }