diff options
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_fence.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c index 5065a140fdf8..5f60be76166e 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c @@ -177,6 +177,9 @@ out_unlock: struct vmw_fence_obj *vmw_fence_obj_reference(struct vmw_fence_obj *fence) { + if (unlikely(fence == NULL)) + return NULL; + kref_get(&fence->kref); return fence; } @@ -191,8 +194,12 @@ struct vmw_fence_obj *vmw_fence_obj_reference(struct vmw_fence_obj *fence) void vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p) { struct vmw_fence_obj *fence = *fence_p; - struct vmw_fence_manager *fman = fence->fman; + struct vmw_fence_manager *fman; + + if (unlikely(fence == NULL)) + return; + fman = fence->fman; *fence_p = NULL; spin_lock_irq(&fman->lock); BUG_ON(atomic_read(&fence->kref.refcount) == 0); |