RDMA/mlx5: Always remove MRs from the cache before destroying them
The cache bucket tracks the total number of MRs that exists, both inside and outside of the cache. Removing a MR from the cache (by setting cache_ent to NULL) without updating total_mrs will cause the tracking to leak and be inflated. Further fix the rereg_mr path to always destroy the MR. reg_create will always overwrite all the MR data in mlx5_ib_mr, so the MR must be completely destroyed, in all cases, before this function can be called. Detach the MR from the cache and unconditionally destroy it to avoid leaking HW mkeys. Fixes: afd14174 ("IB/mlx5: Use direct mkey destroy command upon UMR unreg failure") Fixes: 56e11d62 ("IB/mlx5: Added support for re-registration of MRs") Link: https://lore.kernel.org/r/20200310082238.239865-8-leon@kernel.org Signed-off-by:Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
parent
b91e1751
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