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>
---
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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