diff options
| author | Leon Romanovsky <leonro@mellanox.com> | 2020-11-17 10:01:47 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-11-27 18:38:46 +0300 |
| commit | 2b1f747071c5ce5ad571d80c1541b732cf07f9c1 (patch) | |
| tree | 3c87c912b4298d1c59e400a8b1ead3cfb433b644 /drivers/infiniband/core/restrack.c | |
| parent | b47a98efa97889c5b16d17e77eed3dc4500674eb (diff) | |
| download | linux-2b1f747071c5ce5ad571d80c1541b732cf07f9c1.tar.xz | |
RDMA/core: Allow drivers to disable restrack DB
Driver QP types are special case with no IBTA restrictions. For example,
EFA implemented creation of this QP type as regular one, while mlx5
separated create to two step: create and modify. That separation causes to
the situation where DC QP (mlx5) is always added to the same xarray index
zero.
This change allows to drivers like mlx5 simply disable restrack DB
tracking, but it doesn't disable kref on the memory.
Fixes: 52e0a118a203 ("RDMA/restrack: Track driver QP types in resource tracker")
Link: https://lore.kernel.org/r/20201117070148.1974114-3-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core/restrack.c')
| -rw-r--r-- | drivers/infiniband/core/restrack.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c index a123b22b454a..e0a41c867002 100644 --- a/drivers/infiniband/core/restrack.c +++ b/drivers/infiniband/core/restrack.c @@ -221,11 +221,14 @@ void rdma_restrack_add(struct rdma_restrack_entry *res) { struct ib_device *dev = res_to_dev(res); struct rdma_restrack_root *rt; - int ret; + int ret = 0; if (!dev) return; + if (res->no_track) + goto out; + rt = &dev->res[res->type]; if (res->type == RDMA_RESTRACK_QP) { @@ -253,6 +256,7 @@ void rdma_restrack_add(struct rdma_restrack_entry *res) &rt->next_id, GFP_KERNEL); } +out: if (!ret) res->valid = true; } @@ -325,6 +329,9 @@ void rdma_restrack_del(struct rdma_restrack_entry *res) return; } + if (res->no_track) + goto out; + dev = res_to_dev(res); if (WARN_ON(!dev)) return; @@ -335,8 +342,9 @@ void rdma_restrack_del(struct rdma_restrack_entry *res) if (res->type == RDMA_RESTRACK_MR || res->type == RDMA_RESTRACK_QP) return; WARN_ON(old != res); - res->valid = false; +out: + res->valid = false; rdma_restrack_put(res); wait_for_completion(&res->comp); } |