drm/amdgpu: Fix potential fence use-after-free v2
[ Upstream commit 2e54154b ] fence Decrements the reference count before exiting. Avoid Race Vulnerabilities for fence use-after-free. v2 (chk): actually fix the use after free and not just move it. Signed-off-by: shanzhulig <shanzhulig@gmail.com> Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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