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    Subject[PATCH 5.17 227/343] RDMA/mlx5: Add a missing update of cache->last_add
    Date
    From: Aharon Landau <aharonl@nvidia.com>

    [ 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>
    ---
    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


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