[Intel-gfx] [PATCH 2/3] drm/i915: protect ringbuffer sarea update behind !MODESET

[Daniel Vetter]

Avoids surprises when userspace races open/closes against this.

Cc: Stéphane Marchesin <marcheu at chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index ba686d75ff32..ae6d234b8c12 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1513,7 +1513,8 @@ static int ring_wait_for_space(struct intel_ring_buffer *ring, int n)
 			return 0;
 		}
 
-		if (dev->primary->master) {
+		if (!drm_core_check_feature(dev, DRIVER_MODESET) &&
+		    dev->primary->master) {
 			struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 			if (master_priv->sarea_priv)
 				master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
-- 
1.8.5.2