linux-kernel - [PATCH net-next v2 1/4] net: sparx5: flower: only do lookup if fragment flags are set

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Message-ID: <20240424121632.459022-2-ast@fiberby.net>
Date: Wed, 24 Apr 2024 12:16:22 +0000
From: Asbjørn Sloth Tønnesen <ast@...erby.net>
To: netdev@...r.kernel.org
Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	Daniel Machon <daniel.machon@...rochip.com>,
	UNGLinuxDriver@...rochip.com,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	linux-kernel@...r.kernel.org,
	Jiri Pirko <jiri@...nulli.us>,
	Simon Horman <horms@...nel.org>
Subject: [PATCH net-next v2 1/4] 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@...erby.net>
---
 drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
index 663571fe7b2d..ca9e69d39439 100644
--- 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;
-- 
2.43.0