[PATCH 4.9 049/116] drm/amdgpu: fix init save/restore list in gfx_v8.0

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Rex Zhu <Rex.Zhu@xxxxxxx>

commit 202e0b227b906cb80a2791f21216a55d9468d61b upstream.

set valid data to mmRLC_SRM_INDEX_CNTL_ADDRx/DATAx.

Signed-off-by: Rex Zhu <Rex.Zhu@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -3947,8 +3947,12 @@ static int gfx_v8_0_init_save_restore_li
 	temp = mmRLC_SRM_INDEX_CNTL_ADDR_0;
 	data = mmRLC_SRM_INDEX_CNTL_DATA_0;
 	for (i = 0; i < sizeof(unique_indices) / sizeof(int); i++) {
-		amdgpu_mm_wreg(adev, temp + i, unique_indices[i] & 0x3FFFF, false);
-		amdgpu_mm_wreg(adev, data + i, unique_indices[i] >> 20, false);
+		if (unique_indices[i] != 0) {
+			amdgpu_mm_wreg(adev, temp + i,
+					unique_indices[i] & 0x3FFFF, false);
+			amdgpu_mm_wreg(adev, data + i,
+					unique_indices[i] >> 20, false);
+		}
 	}
 	kfree(register_list_format);