diff --git a/shared-core/radeon_cp.c b/shared-core/radeon_cp.c
index 9dc871ca..2c0549e5 100644
--- a/shared-core/radeon_cp.c
+++ b/shared-core/radeon_cp.c
@@ -1395,8 +1395,11 @@ void radeon_gart_flush(struct drm_device *dev)
 		RADEON_READ_IGPGART(dev_priv, RADEON_IGPGART_FLUSH);
 		RADEON_WRITE_IGPGART(RADEON_IGPGART_FLUSH, 0x0);
 	} else if (dev_priv->flags & RADEON_IS_PCIE) {
-
-
+		u32 tmp = RADEON_READ_PCIE(dev_priv, RADEON_PCIE_TX_GART_CNTL);
+		tmp |= RADEON_PCIE_TX_GART_INVALIDATE_TLB;
+		RADEON_WRITE_PCIE(RADEON_PCIE_TX_GART_CNTL, tmp);
+		tmp &= ~RADEON_PCIE_TX_GART_INVALIDATE_TLB;
+		RADEON_WRITE_PCIE(RADEON_PCIE_TX_GART_CNTL, tmp);
 	} else {