net/mlx5e: Restore destroying state bit after profile cleanup

[ Upstream commit 5629f8859dca7ef74d7314b60de6a957f23166c0 ]

Profile rollback can fail in mlx5e_netdev_change_profile() and we will
end up with invalid mlx5e_priv memset to 0, we must maintain the
'destroying' bit in order to gracefully shutdown even if the
profile/priv are not valid.

This patch maintains the previous state of the 'destroying' state of
mlx5e_priv after priv cleanup, to allow the remove flow to cleanup
common resources from mlx5_core to avoid FW fatal errors as seen below:

$ devlink dev eswitch set pci/0000:00:03.0 mode switchdev
    Error: mlx5_core: Failed setting eswitch to offloads.
dmesg: mlx5_core 0000:00:03.0 enp0s3np0: failed to rollback to orig profile, ...

$ devlink dev reload pci/0000:00:03.0

mlx5_core 0000:00:03.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)
mlx5_core 0000:00:03.0: poll_health:803:(pid 519): Fatal error 3 detected
mlx5_core 0000:00:03.0: firmware version: 28.41.1000
mlx5_core 0000:00:03.0: 0.000 Gb/s available PCIe bandwidth (Unknown x255 link)
mlx5_core 0000:00:03.0: mlx5_function_enable:1200:(pid 519): enable hca failed
mlx5_core 0000:00:03.0: mlx5_function_enable:1200:(pid 519): enable hca failed
mlx5_core 0000:00:03.0: mlx5_health_try_recover:340:(pid 141): handling bad device here
mlx5_core 0000:00:03.0: mlx5_handle_bad_state:285:(pid 141): Expected to see disabled NIC but it is full driver
mlx5_core 0000:00:03.0: mlx5_error_sw_reset:236:(pid 141): start
mlx5_core 0000:00:03.0: NIC IFC still 0 after 4000ms.

Fixes: c4d7eb57687f ("net/mxl5e: Add change profile method")
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260108212657.25090-5-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 5085bc8965dffe3d2075ab9d69cb633c1b42b531..5736ed61e6eba145a5b228c47382358e5bd8d50b 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -6000,6 +6000,7 @@ err_free_cpumask:
 
 void mlx5e_priv_cleanup(struct mlx5e_priv *priv)
 {
+       bool destroying = test_bit(MLX5E_STATE_DESTROYING, &priv->state);
        int i;
 
        /* bail if change profile failed and also rollback failed */
@@ -6026,6 +6027,8 @@ void mlx5e_priv_cleanup(struct mlx5e_priv *priv)
        }
 
        memset(priv, 0, sizeof(*priv));
+       if (destroying) /* restore destroying bit, to allow unload */
+               set_bit(MLX5E_STATE_DESTROYING, &priv->state);
 }
 
 static unsigned int mlx5e_get_max_num_txqs(struct mlx5_core_dev *mdev,