drm/amdgpu/si_dma: remove unused variable in si_dma_stop()

After commit 571c05365892 ("drm/amdgpu: switch sdma buffer function
tear down to a helper"), the variable 'ring' is not used anymore, it
can be removed.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/si_dma.c b/drivers/gpu/drm/amd/amdgpu/si_dma.c
index 4d5e718..abca8b5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/si_dma.c
+++ b/drivers/gpu/drm/amd/amdgpu/si_dma.c
@@ -112,14 +112,12 @@ static void si_dma_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
 
 static void si_dma_stop(struct amdgpu_device *adev)
 {
-       struct amdgpu_ring *ring;
        u32 rb_cntl;
        unsigned i;
 
        amdgpu_sdma_unset_buffer_funcs_helper(adev);
 
        for (i = 0; i < adev->sdma.num_instances; i++) {
-               ring = &adev->sdma.instance[i].ring;
                /* dma0 */
                rb_cntl = RREG32(DMA_RB_CNTL + sdma_offsets[i]);
                rb_cntl &= ~DMA_RB_ENABLE;