[PATCH v6 06/10] drm/qxl: properly pin/unpin shadow

---
  drivers/gpu/drm/qxl/qxl_display.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 60331e31861a..d25fd3acc891 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c

@@ -802,12 +802,14 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
  		}
  		if (user_bo->shadow != qdev->dumb_shadow_bo) {
  			if (user_bo->shadow) {
+				qxl_bo_unpin(user_bo->shadow);
  				drm_gem_object_put
  					(&user_bo->shadow->tbo.base);
  				user_bo->shadow = NULL;
  			}
  			drm_gem_object_get(&qdev->dumb_shadow_bo->tbo.base);
  			user_bo->shadow = qdev->dumb_shadow_bo;
+			qxl_bo_pin(user_bo->shadow);
  		}
  	}
  

@@ -833,6 +835,7 @@ static void qxl_plane_cleanup_fb(struct drm_plane *plane,
  	qxl_bo_unpin(user_bo);
  
  	if (old_state->fb != plane->state->fb && user_bo->shadow) {
+		qxl_bo_unpin(user_bo->shadow);
  		drm_gem_object_put(&user_bo->shadow->tbo.base);
  		user_bo->shadow = NULL;
  	}

@@ -1230,6 +1233,7 @@ int qxl_modeset_init(struct qxl_device *qdev)
  void qxl_modeset_fini(struct qxl_device *qdev)
  {
  	if (qdev->dumb_shadow_bo) {
+		qxl_bo_unpin(qdev->dumb_shadow_bo);
  		drm_gem_object_put(&qdev->dumb_shadow_bo->tbo.base);
  		qdev->dumb_shadow_bo = NULL;
  	}