netdev - [net-next 13/15] net/mlx5e: rep: Improve reg

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Date:   Thu, 11 Mar 2021 14:37:21 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
        Roi Dayan <roid@...dia.com>
Subject: [net-next 13/15] net/mlx5e: rep: Improve reg_cX conditions

From: Saeed Mahameed <saeedm@...dia.com>

There is no point of calculating reg_c1 or overriding reg_c0 if we are
going to abort the function.

Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
index 065126370acd..fcae3c0a4e9f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
@@ -621,11 +621,7 @@ bool mlx5e_rep_tc_update_skb(struct mlx5_cqe64 *cqe,
 	int err;
 
 	reg_c0 = (be32_to_cpu(cqe->sop_drop_qpn) & MLX5E_TC_FLOW_ID_MASK);
-	if (reg_c0 == MLX5_FS_DEFAULT_FLOW_TAG)
-		reg_c0 = 0;
-	reg_c1 = be32_to_cpu(cqe->ft_metadata);
-
-	if (!reg_c0)
+	if (!reg_c0 || reg_c0 == MLX5_FS_DEFAULT_FLOW_TAG)
 		return true;
 
 	/* If reg_c0 is not equal to the default flow tag then skb->mark
@@ -633,6 +629,8 @@ bool mlx5e_rep_tc_update_skb(struct mlx5_cqe64 *cqe,
 	 */
 	skb->mark = 0;
 
+	reg_c1 = be32_to_cpu(cqe->ft_metadata);
+
 	priv = netdev_priv(skb->dev);
 	esw = priv->mdev->priv.eswitch;
 
-- 
2.29.2