netdev - [net 7/9] net/mlx5e: kTLS, Call WARN

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Date:   Thu, 25 Jul 2019 20:36:48 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net 7/9] net/mlx5e: kTLS, Call WARN_ONCE on netdev mismatch

From: Tariq Toukan <tariqt@...lanox.com>

A netdev mismatch in the processed TLS SKB should not occur,
and indicates a kernel bug.
Add WARN_ONCE to spot such cases.

Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Suggested-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
index ea032f54197e..3766545ce259 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
@@ -412,7 +412,7 @@ struct sk_buff *mlx5e_ktls_handle_tx_skb(struct net_device *netdev,
 		goto out;
 
 	tls_ctx = tls_get_ctx(skb->sk);
-	if (unlikely(tls_ctx->netdev != netdev))
+	if (unlikely(WARN_ON_ONCE(tls_ctx->netdev != netdev)))
 		goto err_out;
 
 	priv_tx = mlx5e_get_ktls_tx_priv_ctx(tls_ctx);
-- 
2.21.0