[PATCH] RFT:icl

[Chris Wilson]

---
 drivers/gpu/drm/i915/intel_lrc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 22b57b8926fc..b3facc18374f 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -454,8 +454,10 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
 	}
 
 	/* we need to manually load the submit queue */
-	if (execlists->ctrl_reg)
+	if (execlists->ctrl_reg) {
+		wmb();
 		writel(EL_CTRL_LOAD, execlists->ctrl_reg);
+	}
 
 	execlists_clear_active(execlists, EXECLISTS_ACTIVE_HWACK);
 }
-- 
2.19.1