[PATCH Review 1/1] drm/amd/pm: use pm mutex to protect ecc info table

[Stanley . Yang]

Change-Id: I6afe0332cbb20528648c38665264930d6b091c2f
Signed-off-by: Stanley.Yang <stanley.y...@amd.com>
---
 drivers/gpu/drm/amd/pm/amdgpu_dpm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c 
b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index 9a892d6d1d7a..89fbee568be4 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -643,11 +643,16 @@ int amdgpu_dpm_get_ecc_info(struct amdgpu_device *adev,
                            void *umc_ecc)
 {
        struct smu_context *smu = adev->powerplay.pp_handle;
+       int ret = 0;
 
        if (!is_support_sw_smu(adev))
                return -EOPNOTSUPP;
 
-       return smu_get_ecc_info(smu, umc_ecc);
+       mutex_lock(&adev->pm.mutex);
+       ret = smu_get_ecc_info(smu, umc_ecc);
+       mutex_unlock(&adev->pm.mutex);
+
+       return ret;
 }
 
 struct amd_vce_state *amdgpu_dpm_get_vce_clock_state(struct amdgpu_device 
*adev,
-- 
2.17.1