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    Subject[PATCH 5.9 400/757] IB/mlx4: Adjust delayed work when a dup is observed
    Date
    From: Håkon Bugge <haakon.bugge@oracle.com>

    [ Upstream commit 785167a114855c5aa75efca97000e405c2cc85bf ]

    When scheduling delayed work to clean up the cache, if the entry already
    has been scheduled for deletion, we adjust the delay.

    Fixes: 3cf69cc8dbeb ("IB/mlx4: Add CM paravirtualization")
    Link: https://lore.kernel.org/r/20200803061941.1139994-7-haakon.bugge@oracle.com
    Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
    Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/infiniband/hw/mlx4/cm.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/infiniband/hw/mlx4/cm.c b/drivers/infiniband/hw/mlx4/cm.c
    index b591861934b3c..81d6a3460b55d 100644
    --- a/drivers/infiniband/hw/mlx4/cm.c
    +++ b/drivers/infiniband/hw/mlx4/cm.c
    @@ -280,6 +280,9 @@ static void schedule_delayed(struct ib_device *ibdev, struct id_map_entry *id)
    if (!sriov->is_going_down && !id->scheduled_delete) {
    id->scheduled_delete = 1;
    schedule_delayed_work(&id->timeout, CM_CLEANUP_CACHE_TIMEOUT);
    + } else if (id->scheduled_delete) {
    + /* Adjust timeout if already scheduled */
    + mod_delayed_work(system_wq, &id->timeout, CM_CLEANUP_CACHE_TIMEOUT);
    }
    spin_unlock_irqrestore(&sriov->going_down_lock, flags);
    spin_unlock(&sriov->id_map_lock);
    --
    2.25.1


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