diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 748265a..b7271a1 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -1915,11 +1915,13 @@ static void combios_parse_mmio_table(struct drm_device *dev, uint16_t offset)
 			case 0:
 				val = RBIOS32(offset);
 				offset += 4;
+				(void)RREG32(addr);
 				WREG32(addr, val);
 				break;
 			case 1:
 				val = RBIOS32(offset);
 				offset += 4;
+				(void)RREG32(addr);
 				WREG32(addr, val);
 				break;
 			case 2: