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[rdma-rc,v1,2/3] RDMA/mlx5: Add a missing update of cache->last_add

Message ID c99f076fce4b44829d434936bbcd3b5fc4c95020.1649062436.git.leonro@nvidia.com (mailing list archive)
State Accepted
Delegated to: Jason Gunthorpe
Headers show
Series Fixes for v5.17 | expand

Commit Message

Leon Romanovsky April 4, 2022, 8:58 a.m. UTC 
From: Aharon Landau <aharonl@nvidia.com>

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")
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/hw/mlx5/mr.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 45b0680377ec..32ef67e9a6a7 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -627,6 +627,7 @@  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++;