diff --git a/linux-core/via_dmablit.c b/linux-core/via_dmablit.c
index cbb73711..1fb902cb 100644
--- a/linux-core/via_dmablit.c
+++ b/linux-core/via_dmablit.c
@@ -217,7 +217,9 @@ via_fire_dmablit(drm_device_t *dev, drm_via_sg_info_t *vsg, int engine)
 	VIA_WRITE(VIA_PCI_DMA_MR0  + engine*0x04, VIA_DMA_MR_CM | VIA_DMA_MR_TDIE);
 	VIA_WRITE(VIA_PCI_DMA_BCR0 + engine*0x10, 0);
 	VIA_WRITE(VIA_PCI_DMA_DPR0 + engine*0x10, vsg->chain_start);
+	DRM_WRITEMEMORYBARRIER();
 	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_DE | VIA_DMA_CSR_TS);
+	VIA_READ(VIA_PCI_DMA_CSR0 + engine*0x04);
 }
 
 /*
diff --git a/shared-core/via_dma.c b/shared-core/via_dma.c
index c6e7aa77..90dbb6a2 100644
--- a/shared-core/via_dma.c
+++ b/shared-core/via_dma.c
@@ -489,6 +489,7 @@ static int via_hook_segment(drm_via_private_t *dev_priv,
 			VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
 			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
 			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
+			VIA_READ(VIA_REG_TRANSPACE);
 		} 
 	}
 	return paused;
@@ -572,8 +573,9 @@ static void via_cmdbuf_start(drm_via_private_t * dev_priv)
 
 	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
 	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
-
+	DRM_WRITEMEMORYBARRIER();
 	VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
+	VIA_READ(VIA_REG_TRANSPACE);
 }
 
 static void via_pad_cache(drm_via_private_t *dev_priv, int qwords)