diff options
| author | Yishai Hadas <yishaih@mellanox.com> | 2019-07-23 09:57:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-06 20:05:27 +0300 |
| commit | 7d9a437e1c735349df47012c95a026ceab56a9f7 (patch) | |
| tree | cf29e0cf294a9a4b43c6371830efe172944b478a | |
| parent | 3b68fe223f861e54f1bb3a30b104d96cc8ca4ccd (diff) | |
| download | linux-7d9a437e1c735349df47012c95a026ceab56a9f7.tar.xz | |
IB/mlx5: Use direct mkey destroy command upon UMR unreg failure
commit afd1417404fba6dbfa6c0a8e5763bd348da682e4 upstream.
Use a direct firmware command to destroy the mkey in case the unreg UMR
operation has failed.
This prevents a case that a mkey will leak out from the cache post a
failure to be destroyed by a UMR WR.
In case the MR cache limit didn't reach a call to add another entry to the
cache instead of the destroyed one is issued.
In addition, replaced a warn message to WARN_ON() as this flow is fatal
and can't happen unless some bug around.
Link: https://lore.kernel.org/r/20190723065733.4899-4-leon@kernel.org
Cc: <stable@vger.kernel.org> # 4.10
Fixes: 49780d42dfc9 ("IB/mlx5: Expose MR cache for mlx5_ib")
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 2c2742b0237a..903f4c1028fc 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -538,14 +538,17 @@ void mlx5_mr_cache_free(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) int c; c = order2idx(dev, mr->order); - if (c < 0 || c >= MAX_MR_CACHE_ENTRIES) { - mlx5_ib_warn(dev, "order %d, cache index %d\n", mr->order, c); + WARN_ON(c < 0 || c >= MAX_MR_CACHE_ENTRIES); + + if (unreg_umr(dev, mr)) { + mr->allocated_from_cache = false; + destroy_mkey(dev, mr); + ent = &cache->ent[c]; + if (ent->cur < ent->limit) + queue_work(cache->wq, &ent->work); return; } - if (unreg_umr(dev, mr)) - return; - ent = &cache->ent[c]; spin_lock_irq(&ent->lock); list_add_tail(&mr->list, &ent->head); |