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RDMA/mlx5: Check reg_create() create for errors

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The reg_create() can fail.  Check for errors before dereferencing it.

Fixes: dd1b913fb0 ("RDMA/mlx5: Cache all user cacheable mkeys on dereg MR flow")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/Y+ERYy4wN0LsKsm+@kili
Reviewed-by: Devesh Sharma <devesh.s.sharma@oracle.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Dan Carpenter
2023-02-06 17:40:35 +03:00
committed by Leon Romanovsky
parent 68e416255b
commit 8e6e49ccf1
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/hw/mlx5/mr.c
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@@ -1166,6 +1166,8 @@ static struct mlx5_ib_mr *alloc_cacheable_mr(struct ib_pd *pd,
mutex_lock(&dev->slow_path_mutex);
mr = reg_create(pd, umem, iova, access_flags, page_size, false);
mutex_unlock(&dev->slow_path_mutex);
if (IS_ERR(mr))
return mr;
mr->mmkey.rb_key = rb_key;
return mr;
}