netdev - [net-next V2 02/14] net/mlx5e: aRFS, Warn if aRFS table does not exist for aRFS rule

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Date: Mon, 21 Aug 2023 10:57:27 -0700
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>,
	netdev@...r.kernel.org,
	Tariq Toukan <tariqt@...dia.com>,
	Adham Faris <afaris@...dia.com>
Subject: [net-next V2 02/14] net/mlx5e: aRFS, Warn if aRFS table does not exist for aRFS rule

From: Adham Faris <afaris@...dia.com>

aRFS tables should be allocated and exist in advance. Driver shouldn't
reach a point where it tries to add aRFS rule to table that does not
exist.

Add warning if driver encounters such situation.

Signed-off-by: Adham Faris <afaris@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
index 67d8b198a014..e8b0acf7d454 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
@@ -519,6 +519,8 @@ static struct mlx5_flow_handle *arfs_add_rule(struct mlx5e_priv *priv,
 		 ntohs(tuple->etype));
 	arfs_table = arfs_get_table(arfs, tuple->ip_proto, tuple->etype);
 	if (!arfs_table) {
+		WARN_ONCE(1, "arfs table does not exist for etype %u and ip_proto %u\n",
+			  tuple->etype, tuple->ip_proto);
 		err = -EINVAL;
 		goto out;
 	}
-- 
2.41.0