[Intel-gfx] [PATCH] drm/i915/gt: Don't flush the tasklet if not setup

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> 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 at chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>

Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

> ---
>  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