1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 22bd6c2c2740..410a975a8eec 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -772,7 +772,7 @@ int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring)
         int r;
 
         radeon_scratch_free(rdev, rdev->fence_drv[ring].scratch_reg);
-        if (rdev->wb.use_event) {
+        if (rdev->wb.use_event || !radeon_ring_supports_scratch_reg(rdev, &rdev->ring[ring])) {
                 rdev->fence_drv[ring].scratch_reg = 0;
                 index = R600_WB_EVENT_OFFSET + ring * 4;
         } else {