The execbuf utils may call reference on NULL fence objects.
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Reviewed-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
---
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 8df679f..dfb0b03 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);
--
1.7.4.4
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/dri-devel
