drm/amd/amdgpu/amdgpucs: fix refcount leak of a dmafence obj
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.238 by commit 72d77ddb2224ebc00648f4f78f8a9a259dccbdf7. For more details please see the references link.