From: Aharon Landau <aharonl@nvidia.com>
Date: Mon, 4 Apr 2022 08:58:04 +0000 (+0300)
Subject: RDMA/mlx5: Add a missing update of cache->last_add
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=34b8ba1cb3372dad71557f963e777d4d03f2d3bd;p=linux.git

RDMA/mlx5: Add a missing update of cache->last_add

[ Upstream commit 1d735eeee63a0beb65180ca0224f239cc0c9f804 ]

Update cache->last_add when returning an MR to the cache so that the cache
work won't remove it.

Fixes: b9358bdbc713 ("RDMA/mlx5: Fix locking in MR cache work queue")
Link: https://lore.kernel.org/r/c99f076fce4b44829d434936bbcd3b5fc4c95020.1649062436.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 85289fddc2ae0..cf203f879d340 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -635,6 +635,7 @@ static void mlx5_mr_cache_free(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
 {
 	struct mlx5_cache_ent *ent = mr->cache_ent;
 
+	WRITE_ONCE(dev->cache.last_add, jiffies);
 	spin_lock_irq(&ent->lock);
 	list_add_tail(&mr->list, &ent->head);
 	ent->available_mrs++;