From: Aharon Landau <aharonl@xxxxxxxxxx>
[ 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@xxxxxxxxxx
Signed-off-by: Aharon Landau <aharonl@xxxxxxxxxx>
Reviewed-by: Shay Drory <shayd@xxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/mr.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index d3b2d02a4872..d40a1460ef97 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -632,6 +632,7 @@ 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++;
--
2.35.1
