drm/syncobj: flatten dma_fence_chains on transfer

["Zhang, Jesse(Jie)" <Jesse.Zhang@xxxxxxx>]

[AMD Official Use Only - General]

Fix sync syncobj issue by enable the signaling of the base fence.

 

 

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c

index d5db818f1c76..971ad97a2f54 100644

--- a/drivers/gpu/drm/drm_syncobj.c

+++ b/drivers/gpu/drm/drm_syncobj.c

@@ -887,6 +887,7 @@ static int drm_syncobj_flatten_chain(struct dma_fence **f)

                goto free_fences;

 

        dma_fence_put(*f);

+       dma_fence_enable_sw_signaling(&array->base);

        *f = array->fences[0];

        return 0;