ehea: Avoid changing vlan flags

This patch avoids disabling the vlan flags using ethtool.

Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/ehea/ehea_ethtool.c b/drivers/net/ehea/ehea_ethtool.c
index 1f37ee6b2a26..d6cf502906cf 100644
--- a/drivers/net/ehea/ehea_ethtool.c
+++ b/drivers/net/ehea/ehea_ethtool.c
@@ -263,6 +263,13 @@ static void ehea_get_ethtool_stats(struct net_device *dev,
 
 static int ehea_set_flags(struct net_device *dev, u32 data)
 {
+        /* Avoid changing the VLAN flags */
+        if ((data & (ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN)) !=
+            (ethtool_op_get_flags(dev) & (ETH_FLAG_RXVLAN |
+                                          ETH_FLAG_TXVLAN))){
+                return -EINVAL;
+        }
+
         return ethtool_op_set_flags(dev, data, ETH_FLAG_LRO
                                         | ETH_FLAG_TXVLAN
                                         | ETH_FLAG_RXVLAN);