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    Subject[PATCH 5.4 032/177] drm/amdgpu/vcn2.0: add cancel_delayed_work_sync before power gate
    Date
    From: James Zhu <James.Zhu@amd.com>

    commit 0c6013377b4027e69d8f3e63b6bf556b6cb87802 upstream.

    Add cancel_delayed_work_sync before set power gating state
    to avoid race condition issue when power gating.

    Signed-off-by: James Zhu <James.Zhu@amd.com>
    Reviewed-by: Leo Liu <leo.liu@amd.com>
    Acked-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
    +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
    @@ -293,6 +293,8 @@ static int vcn_v2_0_hw_fini(void *handle
    struct amdgpu_ring *ring = &adev->vcn.inst->ring_dec;
    int i;

    + cancel_delayed_work_sync(&adev->vcn.idle_work);
    +
    if ((adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) ||
    (adev->vcn.cur_state != AMD_PG_STATE_GATE &&
    RREG32_SOC15(VCN, 0, mmUVD_STATUS)))

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