diff options
Diffstat (limited to 'drivers/gpu/drm/qxl/qxl_object.c')
| -rw-r--r-- | drivers/gpu/drm/qxl/qxl_object.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 024c8dd3174c..4928fa602944 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -36,6 +36,7 @@ static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo) qdev = (struct qxl_device *)bo->gem_base.dev->dev_private; qxl_surface_evict(qdev, bo, false); + WARN_ON_ONCE(bo->map_count > 0); mutex_lock(&qdev->gem.mutex); list_del_init(&bo->list); mutex_unlock(&qdev->gem.mutex); @@ -131,6 +132,7 @@ int qxl_bo_kmap(struct qxl_bo *bo, void **ptr) if (bo->kptr) { if (ptr) *ptr = bo->kptr; + bo->map_count++; return 0; } r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap); @@ -139,6 +141,7 @@ int qxl_bo_kmap(struct qxl_bo *bo, void **ptr) bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); if (ptr) *ptr = bo->kptr; + bo->map_count = 1; return 0; } @@ -180,6 +183,9 @@ void qxl_bo_kunmap(struct qxl_bo *bo) { if (bo->kptr == NULL) return; + bo->map_count--; + if (bo->map_count > 0) + return; bo->kptr = NULL; ttm_bo_kunmap(&bo->kmap); } |