drm/amdgpu: fix ref count leak in amdgpu_display_crtc_set_config
in amdgpu_display_crtc_set_config, the call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning. Signed-off-by: NNavid Emamdoost <navid.emamdoost@gmail.com> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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