netdev - [PATCH net-next v3 4/5] net/mlx5: Separate reload devlink ops for multiport device

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Date:   Thu,  7 Oct 2021 09:55:18 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        Ido Schimmel <idosch@...dia.com>,
        Ingo Molnar <mingo@...hat.com>, Jiri Pirko <jiri@...dia.com>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        mlxsw@...dia.com, Moshe Shemesh <moshe@...dia.com>,
        netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Shay Drory <shayd@...dia.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tariq Toukan <tariqt@...dia.com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>
Subject: [PATCH net-next v3 4/5] net/mlx5: Separate reload devlink ops for multiport device

From: Leon Romanovsky <leonro@...dia.com>

Mulitport slave device doesn't support devlink reload, so instead of
complicating initialization flow with devlink_reload_enable() which
will be removed in next patch, set specialized devlink ops callbacks
for reload operations.

This fixes an error when reload counters exposed (and equal zero) for
the mode that is not supported at all.

Fixes: d89ddaae1766 ("net/mlx5: Disable devlink reload for multi port slave device")
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index 22c4afbc77dc..2eefed353e0a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -799,6 +799,7 @@ static void mlx5_devlink_traps_unregister(struct devlink *devlink)
 
 int mlx5_devlink_register(struct devlink *devlink)
 {
+	struct mlx5_core_dev *dev = devlink_priv(devlink);
 	int err;
 
 	err = devlink_params_register(devlink, mlx5_devlink_params,
@@ -816,7 +817,9 @@ int mlx5_devlink_register(struct devlink *devlink)
 	if (err)
 		goto traps_reg_err;
 
-	devlink_set_reload_ops(devlink, &mlx5_devlink_reload_ops);
+	if (!mlx5_core_is_mp_slave(dev))
+		devlink_set_reload_ops(devlink, &mlx5_devlink_reload_ops);
+
 	return 0;
 
 traps_reg_err:
-- 
2.31.1