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drm/vmwgfx: Make vmw_dmabuf_unreference handle NULL objects 

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2012-11-09 12:26:15 +00:00 committed by Dave Airlie
parent 506ff75c92
commit bf6f036848
1 changed files with 6 additions and 3 deletions
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5
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
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@ -699,11 +699,14 @@ static inline struct vmw_surface *vmw_surface_reference(struct vmw_surface *srf)
static inline void vmw_dmabuf_unreference(struct vmw_dma_buffer **buf)
{
struct vmw_dma_buffer *tmp_buf = *buf;
struct ttm_buffer_object *bo = &tmp_buf->base;
*buf = NULL;
if (tmp_buf != NULL) {
struct ttm_buffer_object *bo = &tmp_buf->base;
ttm_bo_unref(&bo);
}
}
static inline struct vmw_dma_buffer *vmw_dmabuf_reference(struct vmw_dma_buffer *buf)
{