diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index c30a12ef6daf..3b946e1c7614 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -2941,7 +2941,7 @@ static int semaphore_passed(struct intel_engine_cs *engine) if (signaller->hangcheck.deadlock >= I915_NUM_ENGINES) return -1; - if (i915_seqno_passed(signaller->get_seqno(signaller, false), seqno)) + if (i915_seqno_passed(signaller->get_seqno(signaller), seqno)) return 1; /* cursory check for an unkickable deadlock */ @@ -3100,8 +3100,18 @@ static void i915_hangcheck_elapsed(struct work_struct *work) semaphore_clear_deadlocks(dev_priv); - seqno = engine->get_seqno(engine, false); + /* We don't strictly need an irq-barrier here, as we are not + * serving an interrupt request, be paranoid in case the + * barrier has side-effects (such as preventing a broken + * cacheline snoop) and so be sure that we can see the seqno + * advance. If the seqno should stick, due to a stale + * cacheline, we would erroneously declare the GPU hung. + */ + if (engine->irq_seqno_barrier) + engine->irq_seqno_barrier(engine); + acthd = intel_ring_get_active_head(engine); + seqno = engine->get_seqno(engine); if (engine->hangcheck.seqno == seqno) { if (ring_idle(engine, seqno)) { |