[PATCH 51/80] drm/i915: Disable waitboosting for a saturated engine

[Chris Wilson]

If the user floods the GPU with so many requests that the engine stalls
waiting for free space, don't automatically promote the GPU to maximum
frequencies. If the GPU really is saturated with work, it will migrate
to high clocks by itself, otherwise it is merely a user flooding us with
busy-work.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 0c3bfc3d20ed..04835c835853 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2308,7 +2308,7 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes)
 	if (WARN_ON(&target->link == &engine->request_list))
 		return -ENOSPC;
 
-	ret = __i915_wait_request(target, true, NULL, NULL);
+	ret = __i915_wait_request(target, true, NULL, NO_WAITBOOST);
 	if (ret)
 		return ret;
 
-- 
2.8.1