net/ixgbevf: fix promiscuous and allmulti

[ upstream commit 21e471abb548f91190479c75da0c28ebc25dec36 ]

The configuration of allmulti and promiscuous modes conflicts
together. For instance, if we enable promiscuous mode, then enable and
disable allmulti, then the promiscuous mode is wrongly disabled.

Fix this behavior by:
- doing nothing when we set/unset allmulti if promiscuous mode is on
- restorting the proper mode (none or allmulti) when we disable
  promiscuous mode

Fixes: 1f4564e ("net/ixgbevf: enable promiscuous mode")

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Wenjun Wu <wenjun1.wu@intel.com>

drivers/net/ixgbe/ixgbe_ethdev.c

@@ -8718,9 +8718,13 @@ static int
 ixgbevf_dev_promiscuous_disable(struct rte_eth_dev *dev)
 {
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int mode = IXGBEVF_XCAST_MODE_NONE;
 	int ret;
 
-	switch (hw->mac.ops.update_xcast_mode(hw, IXGBEVF_XCAST_MODE_NONE)) {
+	if (dev->data->all_multicast)
+		mode = IXGBEVF_XCAST_MODE_ALLMULTI;
+
+	switch (hw->mac.ops.update_xcast_mode(hw, mode)) {
 	case IXGBE_SUCCESS:
 		ret = 0;
 		break;
@@ -8742,6 +8746,9 @@ ixgbevf_dev_allmulticast_enable(struct rte_eth_dev *dev)
 	int ret;
 	int mode = IXGBEVF_XCAST_MODE_ALLMULTI;
 
+	if (dev->data->promiscuous)
+		return 0;
+
 	switch (hw->mac.ops.update_xcast_mode(hw, mode)) {
 	case IXGBE_SUCCESS:
 		ret = 0;
@@ -8763,6 +8770,9 @@ ixgbevf_dev_allmulticast_disable(struct rte_eth_dev *dev)
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	int ret;
 
+	if (dev->data->promiscuous)
+		return 0;
+
 	switch (hw->mac.ops.update_xcast_mode(hw, IXGBEVF_XCAST_MODE_MULTI)) {
 	case IXGBE_SUCCESS:
 		ret = 0;