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    Subject[PATCH 5.11 623/775] drm/sched: Cancel and flush all outstanding jobs before finish.
    Date
    From: Andrey Grodzovsky <andrey.grodzovsky@amd.com>

    commit e582951baabba3e278c97169d0acc1e09b24a72e upstream.

    To avoid any possible use after free.

    Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
    Reviewed-by: Christian König <christian.koenig@amd.com>
    Link: https://patchwork.freedesktop.org/patch/414814/
    CC: stable@vger.kernel.org
    Signed-off-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/gpu/drm/scheduler/sched_main.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/drivers/gpu/drm/scheduler/sched_main.c
    +++ b/drivers/gpu/drm/scheduler/sched_main.c
    @@ -891,6 +891,9 @@ void drm_sched_fini(struct drm_gpu_sched
    if (sched->thread)
    kthread_stop(sched->thread);

    + /* Confirm no work left behind accessing device structures */
    + cancel_delayed_work_sync(&sched->work_tdr);
    +
    sched->ready = false;
    }
    EXPORT_SYMBOL(drm_sched_fini);

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