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[5.12,419/700] RDMA/mlx5: Dont add slave port to unaffiliated list

Message ID 20210712061020.969219583@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman July 12, 2021, 6:08 a.m. UTC 
From: Leon Romanovsky <leonro@nvidia.com>

[ Upstream commit 7ce6095e3bff8e20ce018b050960b527e298f7df ]

The mlx5_ib_bind_slave_port() doesn't remove multiport device from the
unaffiliated list, but mlx5_ib_unbind_slave_port() did it. This unbalanced
flow caused to the situation where mlx5_ib_unaffiliated_port_list was
changed during iteration.

Fixes: 32f69e4be269 ("{net, IB}/mlx5: Manage port association for multiport RoCE")
Link: https://lore.kernel.org/r/2726e6603b1e6ecfe76aa5a12a063af72173bcf7.1622477058.git.leonro@nvidia.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/infiniband/hw/mlx5/main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 59ffbbdda317..21b230096cc1 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -3393,8 +3393,6 @@  static void mlx5_ib_unbind_slave_port(struct mlx5_ib_dev *ibdev,
 
 	port->mp.mpi = NULL;
 
-	list_add_tail(&mpi->list, &mlx5_ib_unaffiliated_port_list);
-
 	spin_unlock(&port->mp.mpi_lock);
 
 	err = mlx5_nic_vport_unaffiliate_multiport(mpi->mdev);
@@ -3542,6 +3540,8 @@  static void mlx5_ib_cleanup_multiport_master(struct mlx5_ib_dev *dev)
 			} else {
 				mlx5_ib_dbg(dev, "unbinding port_num: %d\n", i + 1);
 				mlx5_ib_unbind_slave_port(dev, dev->port[i].mp.mpi);
+				list_add_tail(&dev->port[i].mp.mpi->list,
+					      &mlx5_ib_unaffiliated_port_list);
 			}
 		}
 	}