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RDMA/mlx5: Fix UMR cleanup on error flow of driver init

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[ Upstream commit 9b7d4be967 ]

The cited commit removed from the cleanup flow of umr the checks
if the resources were created. This could lead to null-ptr-deref
in case that we had failure in mlx5_ib_stage_ib_reg_init stage.

Fix it by adding new state to the umr that can say if the resources
were created or not and check it in the umr cleanup flow before
destroying the resources.

Fixes: 04876c12c1 ("RDMA/mlx5: Move init and cleanup of UMR to umr.c")
Reviewed-by: Michael Guralnik <michaelgur@nvidia.com>
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Link: https://lore.kernel.org/r/4cfa61386cf202e9ce330e8d228ce3b25a36326e.1661763459.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maor Gottlieb 2022-08-29 12:02:29 +03:00 committed by Greg Kroah-Hartman
parent d8f7bff9a4
commit f26649e59b
2 changed files with 4 additions and 0 deletions
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1
drivers/infiniband/hw/mlx5/mlx5_ib.h
View file

@ -718,6 +718,7 @@ struct mlx5_ib_umr_context {
};
enum {
MLX5_UMR_STATE_UNINIT,
MLX5_UMR_STATE_ACTIVE,
MLX5_UMR_STATE_RECOVER,
MLX5_UMR_STATE_ERR,

3
drivers/infiniband/hw/mlx5/umr.c
View file

@ -177,6 +177,7 @@ int mlx5r_umr_resource_init(struct mlx5_ib_dev *dev)
sema_init(&dev->umrc.sem, MAX_UMR_WR);
mutex_init(&dev->umrc.lock);
dev->umrc.state = MLX5_UMR_STATE_ACTIVE;
return 0;
@ -191,6 +192,8 @@ int mlx5r_umr_resource_init(struct mlx5_ib_dev *dev)
void mlx5r_umr_resource_cleanup(struct mlx5_ib_dev *dev)
{
if (dev->umrc.state == MLX5_UMR_STATE_UNINIT)
return;
ib_destroy_qp(dev->umrc.qp);
ib_free_cq(dev->umrc.cq);
ib_dealloc_pd(dev->umrc.pd);