netdev - [PATCH net-next v2 2/2] mlx4: make sure to always set the port type

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Message-Id: <20200908222114.190718-3-kuba@kernel.org>
Date:   Tue,  8 Sep 2020 15:21:14 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kernel-team@...com, tariqt@...lanox.com,
        ogerlitz@...lanox.com, yishaih@...lanox.com, saeedm@...lanox.com,
        leonro@...dia.com, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next v2 2/2] mlx4: make sure to always set the port type

Even tho mlx4_core registers the devlink ports, it's mlx4_en
and mlx4_ib which set their type. In situations where one of
the two is not built yet the machine has ports of given type
we see the devlink warning from devlink_port_type_warn() trigger.

Having ports of a type not supported by the kernel may seem
surprising, but it does occur in practice - when the unsupported
port is not plugged in to a switch anyway users are more than happy
not to see it (and potentially allocate any resources to it).

Set the type in mlx4_core if type-specific driver is not built.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 drivers/net/ethernet/mellanox/mlx4/main.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 258c7a96f269..70cf24ba71e4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -3031,6 +3031,17 @@ static int mlx4_init_port_info(struct mlx4_dev *dev, int port)
 	if (err)
 		return err;
 
+	/* Ethernet and IB drivers will normally set the port type,
+	 * but if they are not built set the type now to prevent
+	 * devlink_port_type_warn() from firing.
+	 */
+	if (!IS_ENABLED(CONFIG_MLX4_EN) &&
+	    dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
+		devlink_port_type_eth_set(&info->devlink_port, NULL);
+	else if (!IS_ENABLED(CONFIG_MLX4_INFINIBAND) &&
+		 dev->caps.port_type[port] == MLX4_PORT_TYPE_IB)
+		devlink_port_type_ib_set(&info->devlink_port, NULL);
+
 	info->dev = dev;
 	info->port = port;
 	if (!mlx4_is_slave(dev)) {
-- 
2.26.2