net/mlx5: E-Switch, Hold mutex when querying drop counter in legacy mode
Consider scenario below, CPU 1 is at risk to query already destroyed
drop counters. Need to apply the same state mutex when disabling vport.
+-------------------------------+-------------------------------------+
| CPU 0 | CPU 1 |
+-------------------------------+-------------------------------------+
| mlx5_device_disable_sriov | mlx5e_get_vf_stats |
| mlx5_eswitch_disable | mlx5_eswitch_get_vport_stats |
| esw_disable_vport | mlx5_eswitch_query_vport_drop_stats |
| mlx5_fc_destroy(drop_counter) | mlx5_fc_query(drop_counter) |
+-------------------------------+-------------------------------------+
Fixes: b8a0dbe3a90b ("net/mlx5e: E-switch, Add steering drop counters")
Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
1 file changed