1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3d5d6b908148..6e2661e86d18 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -996,6 +996,10 @@ hsw_vebox_irq_enable(struct intel_engine_cs *engine)
         struct drm_i915_private *dev_priv = engine->i915;
 
         I915_WRITE_IMR(engine, ~engine->irq_enable_mask);
+
+        /* Flush/delay to ensure the RING_IMR is active before the GT IMR */
+        POSTING_READ_FW(RING_IMR(engine->mmio_base));
+
         gen6_unmask_pm_irq(dev_priv, engine->irq_enable_mask);
 }