bnxt: use tc_cls_can_offload_and_chain0()

Make use of tc_cls_can_offload_and_chain0() to set extack msg in case
ethtool tc offload flag is not set or chain unsupported.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -7778,7 +7778,8 @@ static int bnxt_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 {
 	struct bnxt *bp = cb_priv;
 
-	if (!bnxt_tc_flower_enabled(bp) || !tc_can_offload(bp->dev))
+	if (!bnxt_tc_flower_enabled(bp) ||
+	    !tc_cls_can_offload_and_chain0(bp->dev, type_data))
 		return -EOPNOTSUPP;
 
 	switch (type) {

drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c

@@ -1474,9 +1474,6 @@ int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
 {
 	int rc = 0;
 
-	if (cls_flower->common.chain_index)
-		return -EOPNOTSUPP;
-
 	switch (cls_flower->command) {
 	case TC_CLSFLOWER_REPLACE:
 		rc = bnxt_tc_add_flow(bp, src_fid, cls_flower);

drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c

@@ -124,7 +124,8 @@ static int bnxt_vf_rep_setup_tc_block_cb(enum tc_setup_type type,
 	struct bnxt *bp = vf_rep->bp;
 	int vf_fid = bp->pf.vf[vf_rep->vf_idx].fw_fid;
 
-	if (!bnxt_tc_flower_enabled(vf_rep->bp) || !tc_can_offload(bp->dev))
+	if (!bnxt_tc_flower_enabled(vf_rep->bp) ||
+	    !tc_cls_can_offload_and_chain0(bp->dev, type_data))
 		return -EOPNOTSUPP;
 
 	switch (type) {