Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> If the tasklet is not being used, don't try and flush it.
>
> Fixes: 594893870044 ("drm/i915/gt: Add a safety submission flush in the heartbeat")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> index 31049e0bdb57..045179c65c44 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> @@ -1094,6 +1094,9 @@ void intel_engine_flush_submission(struct intel_engine_cs *engine)
> {
> struct tasklet_struct *t = &engine->execlists.tasklet;
>
> + if (!t->func)
> + return;
> +
> /* Synchronise and wait for the tasklet on another CPU */
> tasklet_kill(t);
>
> --
> 2.20.1
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