Use flow_rule_is_supp_control_flags()

Check the mask, not the key, for unsupported control flags.

Only compile-tested, no access to HW

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
---
 drivers/net/ethernet/netronome/nfp/flower/offload.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index 0aceef9fe5826..8e0a890381b60 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -527,10 +527,10 @@ nfp_flower_calculate_key_layers(struct nfp_app *app,
 		struct flow_match_control ctl;
 
 		flow_rule_match_control(rule, &ctl);
-		if (ctl.key->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS) {
-			NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on unknown control flag");
+
+		if (!flow_rule_is_supp_control_flags(NFP_FLOWER_SUPPORTED_CTLFLAGS,
+						     ctl.mask->flags, extack))
 			return -EOPNOTSUPP;
-		}
 	}
 
 	ret_key_ls->key_layer = key_layer;
-- 
2.43.0