RDMA/mlx5: Change the key being sent for MPV device affiliation

Change the key that we send from IB driver to EN driver regarding the
MPV device affiliation, since at that stage the IB device is not yet
initialized, so its index would be zero for different IB devices and
cause wrong associations between unrelated master and slave devices.

Instead use a unique value from inside the core device which is already
initialized at this stage.

Fixes: 0d29371 ("RDMA/mlx5: Send events from IB driver about device affiliation state")
Signed-off-by: Patrisious Haddad <[email protected]>
Link: https://lore.kernel.org/r/ac7e66357d963fc68d7a419515180212c96d137d.1697705185.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <[email protected]>

Author: PatrisiousHaddad

drivers/infiniband/hw/mlx5/main.c

@@ -3267,7 +3267,7 @@ static bool mlx5_ib_bind_slave_port(struct mlx5_ib_dev *ibdev,
 
 	mlx5_ib_init_cong_debugfs(ibdev, port_num);
 
-	key = ibdev->ib_dev.index;
+	key = mpi->mdev->priv.adev_idx;
 	mlx5_core_mp_event_replay(mpi->mdev,
 				  MLX5_DRIVER_EVENT_AFFILIATION_DONE,
 				  &key);