net: sparx5: flower: only do lookup if fragment flags are set

The fragment lookup should only be performed, when
at least one of the fragment flags are set.

This change was deliberately not included in commit
68aba00483c7 ("net: sparx5: flower: fix fragment flags handling")
as it's only needed for future proffing the code, since
"mask" is currently only set in conjunction with the
fragment flags.
(The 3rd flag FLOW_DIS_ENCAPSULATION is only used with "key")

Only compile tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Daniel Machon <daniel.machon@microchip.com>
Tested-by: Daniel Machon <daniel.machon@microchip.com>
Link: https://lore.kernel.org/r/20240424121632.459022-2-ast@fiberby.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
index 663571fe7b2dd18efa5a2d8bf1df7a056825c59e..ca9e69d39439e9030bf718acf59b4015cb0ca474 100644 (file)
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
@@ -165,7 +165,7 @@ sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
 
        flow_rule_match_control(st->frule, &mt);
 
-       if (mt.mask->flags) {
+       if (mt.mask->flags & (FLOW_DIS_IS_FRAGMENT | FLOW_DIS_FIRST_FRAG)) {
                u8 is_frag_key = !!(mt.key->flags & FLOW_DIS_IS_FRAGMENT);
                u8 is_frag_mask = !!(mt.mask->flags & FLOW_DIS_IS_FRAGMENT);
                u8 is_frag_idx = (is_frag_key << 1) | is_frag_mask;