RDMA/mlx5: Don't remove cache MRs when a delay is needed

[ Upstream commit 84c2362fb65d69c721fec0974556378cbb36a62b ]

Don't remove MRs from the cache if need to delay the removal.

Fixes: b9358bdbc713 ("RDMA/mlx5: Fix locking in MR cache work queue")
Link: https://lore.kernel.org/r/c3087a90ff362c8796c7eaa2715128743ce36722.1649062436.git.leonro@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 7bb1b9d..85289fd 100644 (file)
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -536,8 +536,10 @@ static void __cache_work_func(struct mlx5_cache_ent *ent)
                spin_lock_irq(&ent->lock);
                if (ent->disabled)
                        goto out;
-               if (need_delay)
+               if (need_delay) {
                        queue_delayed_work(cache->wq, &ent->dwork, 300 * HZ);
+                       goto out;
+               }
                remove_cache_mr_locked(ent);
                queue_adjust_cache_locked(ent);
        }