• Bhaktipriya Shridhar's avatar
    [media] sn9c20x: Remove deprecated create_singlethread_workqueue · edf096be
    Bhaktipriya Shridhar authored
    The workqueue "work_thread" is involved in JPEG quality update.
    It has a single work item(&sd->work) and hence doesn't require ordering.
    Also, it is not being used on a memory reclaim path. Hence, the
    singlethreaded workqueue has been replaced with the use of system_wq.
    
    System workqueues have been able to handle high level of concurrency
    for a long time now and hence it's not required to have a singlethreaded
    workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue
    created with create_singlethread_workqueue(), system_wq allows multiple
    work items to overlap executions even on the same CPU; however, a
    per-cpu workqueue doesn't have any CPU locality or global ordering
    guarantee unless the target CPU is explicitly specified and thus the
    increase of local concurrency shouldn't make any difference.
    
    Work item has been flushed in sd_stop0() to ensure that there are no
    pending tasks while disconnecting the driver.
    Signed-off-by: default avatarBhaktipriya Shridhar <bhaktipriya96@gmail.com>
    Acked-by: default avatarTejun Heo <tj@kernel.org>
    Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
    edf096be
sn9c20x.c 69.6 KB