iavf: use tc_cls_can_offload_and_chain0() instead of chain check

Looks like the iavf code actually experienced a race condition, when a
developer took code before the check for chain 0 was put to helper.
So use tc_cls_can_offload_and_chain0() helper instead of direct check and
move the check to _cb() so this is similar to i40e code.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 62fe56d..76361bd 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -3061,9 +3061,6 @@ static int iavf_delete_clsflower(struct iavf_adapter *adapter,
 static int iavf_setup_tc_cls_flower(struct iavf_adapter *adapter,
                                    struct flow_cls_offload *cls_flower)
 {
-       if (cls_flower->common.chain_index)
-               return -EOPNOTSUPP;
-
        switch (cls_flower->command) {
        case FLOW_CLS_REPLACE:
                return iavf_configure_clsflower(adapter, cls_flower);
@@ -3087,6 +3084,11 @@ static int iavf_setup_tc_cls_flower(struct iavf_adapter *adapter,
 static int iavf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
                                  void *cb_priv)
 {
+       struct iavf_adapter *adapter = cb_priv;
+
+       if (!tc_cls_can_offload_and_chain0(adapter->netdev, type_data))
+               return -EOPNOTSUPP;
+
        switch (type) {
        case TC_SETUP_CLSFLOWER:
                return iavf_setup_tc_cls_flower(cb_priv, type_data);