linux-kernel - [PATCH] [net-next] net/mlx5e: fix ip6_dst

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Message-Id: <20260204130057.4107804-1-arnd@kernel.org>
Date: Wed,  4 Feb 2026 14:00:49 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Saeed Mahameed <saeedm@...dia.com>,
	Leon Romanovsky <leon@...nel.org>,
	Tariq Toukan <tariqt@...dia.com>,
	Mark Bloch <mbloch@...dia.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Jianbo Liu <jianbol@...dia.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Cosmin Ratiu <cratiu@...dia.com>,
	Raed Salem <raeds@...dia.com>,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [net-next] net/mlx5e: fix ip6_dst_lookup link failure

From: Arnd Bergmann <arnd@...db.de>

Changing mlx5 to call ip6_dst_lookup() means it now fails to link
when IPv6 is a loadable module but ipsec support is built-in:

ipsec.c:(.text+0x1061): undefined reference to `ip6_dst_lookup'

Add a Kconfig dependency that removes avoids this configuration.

Fixes: e35d7da8dd9e ("net/mlx5e: Use ip6_dst_lookup instead of ipv6_dst_lookup_flow for MAC init")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
index 9cf394c66939..c298efe93f97 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
@@ -154,6 +154,7 @@ config MLX5_EN_IPSEC
 	depends on MLX5_CORE_EN
 	depends on XFRM_OFFLOAD
 	depends on INET_ESP_OFFLOAD || INET6_ESP_OFFLOAD
+	depends on IPV6!=m || MLX5_CORE=m
 	help
 	  Build support for IPsec cryptography-offload acceleration in the NIC.
 
-- 
2.39.5