RDMA/mlx5: Uncacheable mkey has neither rb_key or cache_ent

[ Upstream commit 0611a8e8b475fc5230b9a24d29c8397aaab20b63 ]

As some mkeys can't be modified with UMR due to some UMR limitations,
like the size of translation that can be updated, not all user mkeys can
be cached.

Fixes: dd1b913fb0d0 ("RDMA/mlx5: Cache all user cacheable mkeys on dereg MR flow")
Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Link: https://lore.kernel.org/r/f2742dd934ed73b2d32c66afb8e91b823063880c.1712140377.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index bbe79b86c71789c0e18647fc881e775e752d89e5..989968ba74153477c56db5679546d17c92f17803 100644 (file)
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -643,7 +643,7 @@ struct mlx5_ib_mkey {
        unsigned int ndescs;
        struct wait_queue_head wait;
        refcount_t usecount;
-       /* User Mkey must hold either a rb_key or a cache_ent. */
+       /* Cacheable user Mkey must hold either a rb_key or a cache_ent. */
        struct mlx5r_cache_rb_key rb_key;
        struct mlx5_cache_ent *cache_ent;
 };