linux-kernel - [PATCH net-next 1/2] net: sparx5: flower: cleanup sparx5_tc_flower_handler_control

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Date: Tue, 23 Apr 2024 10:27:26 +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,
	Jacob Keller <jacob.e.keller@...el.com>
Subject: [PATCH net-next 1/2] net: sparx5: flower: cleanup sparx5_tc_flower_handler_control_usage()

Define extack locally, to reduce line lengths and future users.

Only perform fragment handling, when at least one fragment flag is set.

Remove goto, as it's only used once, and the error message is specific
to that context.

Only compile tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
---
 .../ethernet/microchip/sparx5/sparx5_tc_flower.c    | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
index 663571fe7b2d..d846edd77a01 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
@@ -159,13 +159,14 @@ sparx5_tc_flower_handler_basic_usage(struct vcap_tc_flower_parse_usage *st)
 static int
 sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
 {
+	struct netlink_ext_ack *extack = st->fco->common.extack;
 	struct flow_match_control mt;
 	u32 value, mask;
 	int err = 0;
 
 	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;
@@ -190,17 +191,15 @@ sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
 		err = vcap_rule_add_key_u32(st->vrule,
 					    VCAP_KF_L3_FRAGMENT_TYPE,
 					    value, mask);
-		if (err)
-			goto out;
+		if (err) {
+			NL_SET_ERR_MSG_MOD(extack, "ip_frag parse error");
+			return err;
+		}
 	}
 
 	st->used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL);
 
 	return err;
-
-out:
-	NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_frag parse error");
-	return err;
 }
 
 static int
-- 
2.43.0