[Intel-gfx] [PATCH 1/8] drm/i915/breadcrumbs: Reduce missed-breadcrumb false positive rate

[Chris Wilson]

Change the on-cpu check to on-runqueue to catch if the waiter has been
woken (and reset its current_state back to TASK_UNINTERRUPTIBLE to
perform the seqno check) but is sleeping due to being preempted off the
cpu.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/intel_breadcrumbs.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c
index 84bf8d827136..447c5256f63a 100644
--- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
@@ -27,11 +27,7 @@
 
 #include "i915_drv.h"
 
-#ifdef CONFIG_SMP
-#define task_asleep(tsk) ((tsk)->state & TASK_NORMAL && !(tsk)->on_cpu)
-#else
-#define task_asleep(tsk) ((tsk)->state & TASK_NORMAL)
-#endif
+#define task_asleep(tsk) ((tsk)->state & TASK_NORMAL && !(tsk)->on_rq)
 
 static unsigned int __intel_breadcrumbs_wakeup(struct intel_breadcrumbs *b)
 {
-- 
2.20.0.rc1