[PATCH 5.10 109/663] net/mlx5: Disallow RoCE on multi port slave device

[Greg Kroah-Hartman]

From: Shay Drory <sh...@nvidia.com>

[ Upstream commit c70f8597fcc1399ef6d5b5ce648a31d887d5dba2 ]

In dual port mode, setting roce enabled/disable for the slave device
have no effect. e.g.: the slave device roce status remain unchanged.
Therefore disable it and add an error message.
Enable or disable roce of the master device affect both master and slave
devices.

Fixes: cc9defcbb8fa ("net/mlx5: Handle "enable_roce" devlink param")
Signed-off-by: Shay Drory <sh...@nvidia.com>
Reviewed-by: Moshe Shemesh <mo...@nvidia.com>
Signed-off-by: Saeed Mahameed <sae...@nvidia.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c 
b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index a28f95df2901d..7ffc94c4979b2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -282,6 +282,10 @@ static int mlx5_devlink_enable_roce_validate(struct 
devlink *devlink, u32 id,
                NL_SET_ERR_MSG_MOD(extack, "Device doesn't support RoCE");
                return -EOPNOTSUPP;
        }
+       if (mlx5_core_is_mp_slave(dev)) {
+               NL_SET_ERR_MSG_MOD(extack, "Multi port slave device can't 
configure RoCE");
+               return -EOPNOTSUPP;
+       }
 
        return 0;
 }
-- 
2.27.0