From: Shay Drory <shayd@nvidia.com>
Date: Thu, 31 Dec 2020 15:04:08 +0200
Subject: net/mlx5: Disable devlink reload for lag devices
Patch-mainline: v5.12-rc1
Git-commit: edac23c2b3d3ac64cfcd351087295893671adbf5
References: jsc#SLE-8464

Devlink reload can't be allowed on lag devices since reloading one lag
device will cause traffic on the bond to get stucked.
Users who wish to reload a lag device, need to remove the device from
the bond, and only then reload it.

Fixes: 4383cfcc65e7 ("net/mlx5: Add devlink reload")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -101,6 +101,10 @@ static int mlx5_devlink_reload_up(struct
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
 
+	if (mlx5_lag_is_active(dev)) {
+		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported in Lag mode\n");
+		return -EOPNOTSUPP;
+	}
 	return mlx5_load_one(dev, false);
 }