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net/mlx5: Prevent flow steering mode changes in switchdev mode

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Changing flow steering modes is not allowed when eswitch is in switchdev
mode. This fix ensures that any steering mode change, including to
firmware steering, is correctly blocked while eswitch mode is switchdev.

Fixes: e890acd5ff ("net/mlx5: Add devlink flow_steering_mode parameter")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/20250825143435.598584-9-mbloch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Moshe Shemesh 2025-08-25 17:34:31 +03:00 committed by Jakub Kicinski
parent 26e42ec771
commit cf9a8627b9
1 changed files with 7 additions and 8 deletions
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15
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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@ -3734,6 +3734,13 @@ static int mlx5_fs_mode_validate(struct devlink *devlink, u32 id,
char *value = val.vstr;
u8 eswitch_mode;
eswitch_mode = mlx5_eswitch_mode(dev);
if (eswitch_mode == MLX5_ESWITCH_OFFLOADS) {
NL_SET_ERR_MSG_FMT_MOD(extack,
"Changing fs mode is not supported when eswitch offloads enabled.");
return -EOPNOTSUPP;
}
if (!strcmp(value, "dmfs"))
return 0;
@ -3759,14 +3766,6 @@ static int mlx5_fs_mode_validate(struct devlink *devlink, u32 id,
return -EINVAL;
}
eswitch_mode = mlx5_eswitch_mode(dev);
if (eswitch_mode == MLX5_ESWITCH_OFFLOADS) {
NL_SET_ERR_MSG_FMT_MOD(extack,
"Moving to %s is not supported when eswitch offloads enabled.",
value);
return -EOPNOTSUPP;
}
return 0;
}