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The dma_fence_set_error() function allows to set an error code on a dma_fence object before it is signaled. Document some of the potential error codes drivers should use and especially what they mean. Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240826122541.85663-2-christian.koenig@amd.com